Cytotoxic T cells a) lyse cells infected with virus. Cytotoxic T cells play a role in graft rejection.

Cytotoxic T cells
a) lyse cells infected with virus.
Cytotoxic T cells play a role in graft rejection.
b) are important in producing circulating antibodies.
B cells are lymphocytes important in producing circulating antibodies.
c) attack foreign invaders (antigens) directly.
Helper T cells are lymphocytes that attack antigens directly.
d) decrease B cell activity to a level at which the immune system is
compatible with life.
Suppressor T cells are lymphocytes that decrease B-cell activity to a
level at which the immune system is compatible with life.
by

1 Answer

Answer :

a) lyse cells infected with virus.
Cytotoxic T cells play a role in graft rejection.
by

Related questions

Which of the following responses identifies a role of T lymphocytes? a) Transplant rejection Transplant rejection and graft-versus-host disease are cellular response roles of T cells.

Description : Which of the following responses identifies a role of T lymphocytes? a) Transplant rejection Transplant rejection and graft-versus-host disease are cellular response roles of T cells. ... ) Bacterial phagocytosis and lysis Bacterial phagocytosis and lysis are humoral response roles of Blymphocytes.

Last Answer : a) Transplant rejection Transplant rejection and graft-versus-host disease are cellular response roles of T cells.

The following are true : a. the HLA proteins are found within the cytoplasm of the cells b. HLA class I antigens are expressed on all cells with nuclei c. HLA class II antigens presents the virus infected cells to cytotoxic T lymphocytes d. HLA genes are found on chromosome 6 e. HLA tissue typing is carried out in all forms of transplantation to prevent rejection

Description : The following are true : a. the HLA proteins are found within the cytoplasm of the cells b. HLA class I antigens are expressed on all cells with nuclei c. HLA class II antigens presents ... on chromosome 6 e. HLA tissue typing is carried out in all forms of transplantation to prevent rejection

Last Answer : HLA class I antigens are expressed on all cells with nuclei

The nurse providing education regarding sexually transmitted diseases includes which of the following statements regarding herpes virus 2 (herpes genitalis)? a) In pregnant women with active herpes virus, babies delivered vaginally may become infected with the virus. Therefore, a cesarean delivery may be performed if the virus recurs near the time of delivery.

Description : The nurse providing education regarding sexually transmitted diseases includes which of the following statements regarding herpes virus 2 (herpes genitalis)? a) In pregnant women with active herpes virus, babies ... very difficult to kill. Usually, the virus is killed at room temperature by drying.

Last Answer : a) In pregnant women with active herpes virus, babies delivered vaginally may become infected with the virus. Therefore, a cesarean delivery may be performed if the virus recurs near the time of delivery.

The herpes simplex virus (HSV-1), which produces a cold sore (fever blister), has an incubation period of a) 2-12 days. HSV-1 is transmitted primarily by direct contact with infected secretions. b) 0-3 months. The time period 0-3 months exceeds the incubation period. c) 20-30 days. The time period 20-30 days exceeds the incubation period. d) 3-6 months. The time period 3-6 months exceeds the incubation period.

Description : The herpes simplex virus (HSV-1), which produces a cold sore (fever blister), has an incubation period of a) 2-12 days. HSV-1 is transmitted primarily by direct contact with infected secretions. b) ... the incubation period. d) 3-6 months. The time period 3-6 months exceeds the incubation period.

Last Answer : a) 2-12 days. HSV-1 is transmitted primarily by direct contact with infected secretions.

In higher vertebrates, the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self- cells, then it leads to (a) autoimmune disease (b) active immunity (c) allergic response (d) graft rejection.

Description : In higher vertebrates, the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self- cells, then it leads to (a) autoimmune disease (b) active immunity (c) allergic response (d) graft rejection.

Last Answer : (a) autoimmune disease

Human immunodeficiency virus destroys (A) Cytotoxic T cells (B) Helper T cells (C) B cells (D) Plasma cells

Description : Human immunodeficiency virus destroys (A) Cytotoxic T cells (B) Helper T cells (C) B cells (D) Plasma cells

Last Answer : Answer : B

Which of the following terms refers to a graft derived from one part of a patient’s body and used on another part of that same patient’s body? a) Autograft Autografts of full-thickness and pedicle flaps are commonly used for reconstructive surgery, months or years after the initial injury.

Description : Which of the following terms refers to a graft derived from one part of a patient's body and used on another part of that same patient's body? a) Autograft Autografts of full-thickness and pedicle ... A heterograft is a graft obtained from an animal of a species other than that of the recipient.

Last Answer : a) Autograft Autografts of full-thickness and pedicle flaps are commonly used for reconstructive surgery, months or years after the initial injury.

Which of the following types of aneurysms results in bleeding into the layers of the arterial wall? a) Dissecting Dissection results from a rupture in the intimal layer, resulting in bleeding between the intimal and medial layers of the arterial wall. b) Saccular Saccular aneurysms collect blood in the weakened outpouching. c) False In a false aneurysm, the mass is actually a pulsating hematoma. d) Anastomotic An anastomotic aneurysm occurs as a result of infection at arterial suture or graft sites.

Description : Which of the following types of aneurysms results in bleeding into the layers of the arterial wall? a) Dissecting Dissection results from a rupture in the intimal layer, resulting in bleeding ... Anastomotic An anastomotic aneurysm occurs as a result of infection at arterial suture or graft sites.

Last Answer : a) Dissecting Dissection results from a rupture in the intimal layer, resulting in bleeding between the intimal and medial layers of the arterial wall.

Of the following types of cells, which are believed to play a significant role in cutaneous immune system reactions? a) Langerhans’ cells Langerhans’ cells are common to the epidermis and are accessory cells of the afferent immune system process.

Description : Of the following types of cells, which are believed to play a significant role in cutaneous immune system reactions? a) Langerhans' cells Langerhans' cells are common to the epidermis and are ... and skin. d) Phagocytes Phagocytes are white blood cells that engulf and destroy foreign materials.

Last Answer : a) Langerhans’ cells Langerhans’ cells are common to the epidermis and are accessory cells of the afferent immune system process.

Rejection of a transplanted kidney within 24 hours after transplant is termed a) hyperacute rejection. Hyperacute rejection may require removal of the transplanted kidney.

Description : Rejection of a transplanted kidney within 24 hours after transplant is termed a) hyperacute rejection. Hyperacute rejection may require removal of the transplanted kidney. b) acute rejection. Acute ... term simple is not used in the categorization of types of rejection of kidney transplants.

Last Answer : a) hyperacute rejection. Hyperacute rejection may require removal of the transplanted kidney.

The role of the M cell is toA- .trap virus in mucus and prevent entry B- induce apoptosis in virus-infected small intestinal epithelia cells C- pass bacteria or virus to underlying macrophages for processing and presentation of antigen D- they use their cilia to propel mucus out of the small intestine

Description : The role of the M cell is to A- .trap virus in mucus and prevent entry B- induce apoptosis in virus-infected small intestinal epithelia cells C- pass bacteria or virus to underlying macrophages for ... and presentation of antigen D- they use their cilia to propel mucus out of the small intestine

Last Answer : pass bacteria or virus to underlying macrophages for processing and presentation of antigen

Which of the following immune responses is responsible for rejection of kidney graft? (a) Cell-mediated immune response (b) Auto-immune response (c) Humoral immune response (d) Inflammatory immune response

Description : Which of the following immune responses is responsible for rejection of kidney graft? (a) Cell-mediated immune response (b) Auto-immune response (c) Humoral immune response (d) Inflammatory immune response

Last Answer : (a) Cell-mediated immune response

In which of the following cell mediated immunity (CMI) participates? A.Delayed hypersensitivity reaction B.Graft versus host reaction C.Allograft rejection D.All of the above

Description : In which of the following cell mediated immunity (CMI) participates? A.Delayed hypersensitivity reaction B.Graft versus host reaction C.Allograft rejection D.All of the above

Last Answer : D.All of the above

In which of the following cell mediated immunity (CMI) participates? A.Delayed hypersensitivity reaction B.Graft versus host reaction C.Allograft rejection D.All of the above

Description : In which of the following cell mediated immunity (CMI) participates? A.Delayed hypersensitivity reaction B.Graft versus host reaction C.Allograft rejection D.All of the above

Last Answer : .All of the above

At which stage of HIV infection does one usually show symptoms of AIDS? (a) Within 15 days of sexual contact with an infected person (b) When the infected retro virus enters host cells (c) When HIV damages large number of helper T  - lymphocytes (d) When the viral DNA is produced by reverse transcriptase

Description : At which stage of HIV infection does one usually show symptoms of AIDS? (a) Within 15 days of sexual contact with an infected person (b) When the infected retro virus enters host cells (c) ... large number of helper T  - lymphocytes (d) When the viral DNA is produced by reverse transcriptase

Last Answer : (c) When HIV damages large number of helper T  - lymphocytes

Regarding interferon: a. it is a virus specific molecules b. it acts by neutralizing exotoxin c. it enhances the histocompatibility antigen on cell surface and thereby activate the T cells d. it exerts its effect by integrating itself with the DNA of virus infected cells

Description : Regarding interferon: a. it is a virus specific molecules b. it acts by neutralizing exotoxin c. it enhances the histocompatibility antigen on cell surface and thereby activate the T cells d. it exerts its effect by integrating itself with the DNA of virus infected cells

Last Answer : it enhances the histocompatibility antigen on cell surface and thereby activate the T cells

Which of the following is correct for CD8 T cells? A- CD8 T cells only recognize virus-infected cells B- CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells C- In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only D- CD8 T cells can kill individual virus-infected cells in a contact dependent fashion

Description : Which of the following is correct for CD8 T cells? A- CD8 T cells only recognize virus-infected cells B- CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells ... selection only D- CD8 T cells can kill individual virus-infected cells in a contact dependent fashion

Last Answer : CD8 T cells can kill individual virus-infected cells in a contact dependent fashion

Which of the following reflect the pathophysiology of cutaneous signs of HIV disease? a) Immune function deterioration Cutaneous signs may be the first manifestations of HIV, appearing in more than 90 per cent of HIV infected patients as the immune function deteriorates. Common complaints include pruritis, folliculitis, and chronic actinic dermatitis.

Description : Which of the following reflect the pathophysiology of cutaneous signs of HIV disease? a) Immune function deterioration Cutaneous signs may be the first manifestations of HIV, appearing in more ... Decrease in normal skin flora Cutaneous signs of HIV disease appear as immune function deteriorates.

Last Answer : a) Immune function deterioration Cutaneous signs may be the first manifestations of HIV, appearing in more than 90 per cent of HIV infected patients as the immune function deteriorates. Common complaints include pruritis, folliculitis, and chronic actinic dermatitis.

When caring for a patient receiving autolytic debridement therapy, the nurse a) advises the patient about the foul odor that will occur during therapy. During autolytic debridement therapy a foul odor will be produced by the breakdown of cellular debris. This odor does not indicate that the wound is infected.

Description : When caring for a patient receiving autolytic debridement therapy, the nurse a) advises the patient about the foul odor that will occur during therapy. During autolytic debridement ... Pancrease. Commercially available enzymatic debriding agents include Accuzyme, Clooagenase, Granulex, and Zymase.

Last Answer : a) advises the patient about the foul odor that will occur during therapy. During autolytic debridement therapy a foul odor will be produced by the breakdown of cellular debris. This odor does not indicate that the wound is infected.

In the United States, nurses performing invasive procedures need to be up-to-date with their immunizations, particularly a) Hepatitis B. Hepatitis B is transmitted through contact with infected blood or plasma. b) Hepatitis E. Hepatitis E is found mainly in underdeveloped countries with substandard sanitation and water quality. c) Hepatitis A. hepatitis A is transmitted through the oral route from the feces and saliva of an infected person. d) Hepatitis C. At present, immunization against hepatitis C is not available.

Description : In the United States, nurses performing invasive procedures need to be up-to-date with their immunizations, particularly a) Hepatitis B. Hepatitis B is transmitted through contact with infected blood ... infected person. d) Hepatitis C. At present, immunization against hepatitis C is not available.

Last Answer : a) Hepatitis B. Hepatitis B is transmitted through contact with infected blood or plasma.

Cytotoxic T cells release (A) Perforins (B) Interleukins (C) Colony stimulating factors (D) Tumour necrosis factor

Description : Cytotoxic T cells release (A) Perforins (B) Interleukins (C) Colony stimulating factors (D) Tumour necrosis factor

Last Answer : Answer : B

CD 3 complex and p 56lck proteins are present in (A) Cytotoxic T cells (B) Helper T cells (C) Both (A) and (B) (D) None of these

Description : CD 3 complex and p 56lck proteins are present in (A) Cytotoxic T cells (B) Helper T cells (C) Both (A) and (B) (D) None of these

Last Answer : Answer : D

CD 4 is a transmembrane glycoprotein present in (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Description : CD 4 is a transmembrane glycoprotein present in (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Last Answer : Answer : A

CD 8 is a transmembrane glycoprotein present in (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Description : CD 8 is a transmembrane glycoprotein present in (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Last Answer : Answer : C

MHC Class II proteins, in conjunction with antigens, are recognised by (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Description : MHC Class II proteins, in conjunction with antigens, are recognised by (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Last Answer : Answer : B

MHC class I proteins, in conjunction with antigens are recognised by (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Description : MHC class I proteins, in conjunction with antigens are recognised by (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Last Answer : Answer : A

The most abundant T cells are (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Description : The most abundant T cells are (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

Last Answer : Answer : B

What type of immune cell may control IgE-mediated hypersensitivities? a. Suppressor T cells b. Plasma cells c. Cytotoxic T cells d. Neutrophils

Description : What type of immune cell may control IgE-mediated hypersensitivities? a. Suppressor T cells b. Plasma cells c. Cytotoxic T cells d. Neutrophils

Last Answer : a. Suppressor T cells

The early response in asthma is due to activity. a. Cytotoxic T Cell b. Basophil c. TH2 Cell And NI( Cell d. Dendritic Cells

Description : The early response in asthma is due to activity. a. Cytotoxic T Cell b. Basophil c. TH2 Cell And NI( Cell d. Dendritic Cells

Last Answer : c. TH2 Cell And NI( Cell

The cytotoxic T cells have a_____ co-receptor while the helper T cells have a _____ co-receptor. a. CD8. CD4 b. CD4, CD8 c. MHCI, MHCII d. MHCII, MHCI

Description : The cytotoxic T cells have a_____ co-receptor while the helper T cells have a _____ co-receptor. a. CD8. CD4 b. CD4, CD8 c. MHCI, MHCII d. MHCII, MHCI

Last Answer : a. CD8. CD4

Cytotoxic T cells release which 2 toxic proteins as they fight target cells? a. histamine and heparin b. perforin and granzymes c. interleukin and interferon d. lysozymes and cytokines

Description : Cytotoxic T cells release which 2 toxic proteins as they fight target cells? a. histamine and heparin b. perforin and granzymes c. interleukin and interferon d. lysozymes and cytokines

Last Answer : b. perforin and granzymes

Performs and granzymes are found in a. Helper T cells. b. Antigen-presenting cells. c. Cytotoxic T cells. d. B cells.

Description : Performs and granzymes are found in a. Helper T cells. b. Antigen-presenting cells. c. Cytotoxic T cells. d. B cells.

Last Answer : c. Cytotoxic T cells.

TH1 cells activatea. B cells. b. Killing of pathogens in macrophages. c. Cytotoxic T cells. d. Humoral immunity.

Description : TH1 cells activate a. B cells. b. Killing of pathogens in macrophages. c. Cytotoxic T cells. d. Humoral immunity.

Last Answer : d. Humoral immunity

Cytotoxic T-cells can be recognized by which of the following cell surface marker? A- CD4 B- CD7 C- CD8 D- CD9

Description : Cytotoxic T-cells can be recognized by which of the following cell surface marker? A- CD4 B- CD7 C- CD8 D- CD9

Last Answer : CD8

CD8 surface antigen is present in A- cytotoxic T cells B- .suppresssor T cells C- both (a) and (b) D- none of these

Description : CD8 surface antigen is present in A- cytotoxic T cells B- .suppresssor T cells C- both (a) and (b) D- none of these

Last Answer : both (a) and (b)

Type I ADR reactions is___________ a) Caused when T-cells bind to a specific antigen b) Caused by tissue injury c) IgE mediated d) Caused by cytotoxic antibodies

Description : Type I ADR reactions is___________ a) Caused when T-cells bind to a specific antigen b) Caused by tissue injury c) IgE mediated d) Caused by cytotoxic antibodies

Last Answer : c) IgE mediated 

Natural killer cells are involved in A- .tumour rejection B- .allograft rejection C- non-specific killing of virus transformed target cells D- all of these

Description : Natural killer cells are involved in A- .tumour rejection B- .allograft rejection C- non-specific killing of virus transformed target cells D- all of these

Last Answer : all of these

Immunosuppressive agents used in preventing transplant rejection primarily affecta. macrophages. b. neutrophils. c. dendritic cells. d. T cells.

Description : Immunosuppressive agents used in preventing transplant rejection primarily affect a. macrophages. b. neutrophils. c. dendritic cells. d. T cells.

Last Answer : d. T cells.

The antibiotic penicillin is obtained from which of the following? (1) synthetic process (2) a bacterium (3) fungus (4) virus infected cells

Description : The antibiotic penicillin is obtained from which of the following? (1) synthetic process (2) a bacterium (3) fungus (4) virus infected cells

Last Answer : (3) fungus Explanation: Penicillins are a group of antibiotics used to treat a large range of bacterial infections. They are derived from Penicillium fungi and can be taken orally or via injection. Penicillin was discovered in 1928 by Scottish scientist Alexander Fleming.

Lysozyme that is present in perspiration, saliva and tears, destroys (a) certain types of bacteria (b) all viruses (c) most virus-infected cells (d) certain fungi.

Description : Lysozyme that is present in perspiration, saliva and tears, destroys (a) certain types of bacteria (b) all viruses (c) most virus-infected cells (d) certain fungi.

Last Answer : (a) certain types of bacteria

With regard to interferons: a. they are produced by B lymphocytes b. IFN-gamma is produced by cells infected with virus c. IFN-gamma increases MCH class I and II expression in antigen presenting cell d. IFN-gamma is produced by fibroblasts

Description : With regard to interferons: a. they are produced by B lymphocytes b. IFN-gamma is produced by cells infected with virus c. IFN-gamma increases MCH class I and II expression in antigen presenting cell d. IFN-gamma is produced by fibroblasts

Last Answer : IFN-gamma is produced by cells infected with virus

____ becomes activated to eliminate "nonself" cells, such as virus- infected cells or cancer cells. a. Humoral immune response b. Cell-mediated immune response c. Complement d. Inflammation

Description : ____ becomes activated to eliminate "nonself" cells, such as virus- infected cells or cancer cells. a. Humoral immune response b. Cell-mediated immune response c. Complement d. Inflammation

Last Answer : b. Cell-mediated immune response

Virus infected cells produce a set of cytokine proteins called _____ that "alert" surrounding cells to the viral threat. a. Interleukin-1 (IL-1) b. Interferon. c. Toll Like Receptors (TLR) d. Acute Phase Proteins

Description : Virus infected cells produce a set of cytokine proteins called _____ that "alert" surrounding cells to the viral threat. a. Interleukin-1 (IL-1) b. Interferon. c. Toll Like Receptors (TLR) d. Acute Phase Proteins

Last Answer : b. Interferon.

A viral load test detects the A- provirus of HIV in infected cells B- .total amount of virus in the infected host C- number of viruses being released by each infected cell D- .amount of bacteriophage being produced by E. coli cells

Description : A viral load test detects the A- provirus of HIV in infected cells B- .total amount of virus in the infected host C- number of viruses being released by each infected cell D- .amount of bacteriophage being produced by E. coli cells

Last Answer : provirus of HIV in infected cells

The high virus selectivity of acyclovir is due to: A. Its preferential uptake by virus infected cells B. Need of virus specific enzyme for its conversion to the active metabolite C. Its action on virus directed reverse transcriptase which does not occur in noninfected cells D. Both ‘A’ and ‘B’ are correct

Description : The high virus selectivity of acyclovir is due to: A. Its preferential uptake by virus infected cells B. Need of virus specific enzyme for its conversion to the active metabolite C. Its action on ... reverse transcriptase which does not occur in noninfected cells D. Both A' and B' are correct

Last Answer : D. Both ‘A’ and ‘B’ are correct

Interferons are produced by virus infected cells to protect healthy plants from virus infection. Identify the type of barrier it represents.

Description : 6 Interferons are produced by virus infected cells to protect healthy plants from virus infection. Identify the type of barrier it represents. a. cytokine b. physical c. cellular d. physiological

Last Answer : Ans. cytokine

The antibiotic penicillin is obtained from which of the following ? (1) synthetic process (2) a bacterium (3) fungus (4) virus infected cells

Description : The antibiotic penicillin is obtained from which of the following ? (1) synthetic process (2) a bacterium (3) fungus (4) virus infected cells

Last Answer : fungus

A mutant strain of T4 - Bacteriophage, R-II, fails to lyse the E. coli but when two strains R-IIX and R-IIY are mixed then they lyse the E. coli. What may be the possible reason? (a) Bacteriophage transforms in wild. (b) It is not mutated. (c) Both strains have similar cistrons. (d) Both strains have different cistrons.

Description : A mutant strain of T4 - Bacteriophage, R-II, fails to lyse the E. coli but when two strains R-IIX and R-IIY are mixed then they lyse the E. coli. What may be the possible reason? (a) ... . (b) It is not mutated. (c) Both strains have similar cistrons. (d) Both strains have different cistrons.

Last Answer : (d) Both strains have different cistrons.

Acquisition of inducible energy dependent efflux proteins by bacteria serves to: A. Secrete exotoxins B. Enhance virulance C. Lyse host tissue D. Confer antibiotic resistance

Description : Acquisition of inducible energy dependent efflux proteins by bacteria serves to: A. Secrete exotoxins B. Enhance virulance C. Lyse host tissue D. Confer antibiotic resistance

Last Answer : D. Confer antibiotic resistance

Which of the following statements reflects the nursing management of the patient with West Nile Virus infection? There is no treatment for West Nile Virus infection. Patients are supported by fluid replacement, airway management, and standard nursing care support during the time that the patient has meningitis symptoms. a) The incubation period is three to five days. The incubation period (from mosquito bite until onset of symptoms) is between 5–15 days.

Description : Which of the following statements reflects the nursing management of the patient with West Nile Virus infection? There is no treatment for West Nile Virus infection. Patients are supported by fluid replacement ... the virus to animals and humans. There is no human-to-human transmission of virus.

Last Answer : a) The incubation period is three to five days. The incubation period (from mosquito bite until onset of symptoms) is between 5–15 days.