Description : The virus of AIDS affects the growth of (1) Haemoglobin (2) RBCs in blood (3) T cells in blood (4) Grey cells in brain
Last Answer : (3) T cells in blood Explanation: Human immunodeficiency virus (HIV) attacks and kills crucial immune system cells, known as T-helper cells. A T cell, or T lymphocyte, is a type of ... role in cell-mediated immunity. They are called T cells because they mature in the thymus from thymocytes.
Description : The virus of AIDS affects the growth of _________ (1) Haemoglobin (2) RBCs in blood (3) T cells in blood (4) Grey cells in brain
Last Answer : T cells in blood
Description : Growth of which organ does the virus of AIDS affects? -Do You Know?
Last Answer : answer:
Description : Growth of which organ does the virus of AIDS affects?
Description : Which of the following hormones is NOT correctly matched with its description? A) thymosin--aids in production of T cells B) thyroxin--needed for growth and development in vertebrates ... by removing glucose into tissues E) epinephrine--released by the adrenal medulla under stressful conditions
Last Answer : D) cortisol--lowers blood glucose level by removing glucose into tissues E) epinephrine--released by the adrenal medulla under stressful conditions
Description : Read the following statements (A-D) `:-` A. RBCs are the most abundant of all the cells in blood B. A healthy adult man has on an average 5 Billions t
Last Answer : Read the following statements (A-D) `:-` A. RBCs are the most abundant of all the cells in blood B. A healthy ... `:-`` A. Four B. Three C. Two D. One
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
Description : Which one of the following is not a benefit of saliva – (1) It facilitates swallowing (2) It increases RBCs in the body (3) It keeps the mouth and teeth clean (4) It aids speech by facilitating movements of lips and tongue
Last Answer : (2) It increases RBCs in the body Explanation: Saliva does not increase the number of red blood cells in the body which is a condition of disease called Polycythemia. It results in an increased level of circulating red blood cells in the bloodstream. 674.
Description : Which one of the following is not a benefit of saliva ? (1) It facilitates swallowing (2) It increases RBCs in the body (3) It keeps the mouth and teeth clean (4) It aids speech by facilitating movements of lips and tongue
Last Answer : It increases RBCs in the body
Description : Weil-Felix reaction is based on sharing of antigens between A.sheep RBCs and EB virus B.mycoplasma and human O group RBCs C.rickettsial antigens and antigens of certain strains of Proteus D.none of these
Last Answer : C.rickettsial antigens and antigens of certain strains of Proteus
Description : What happens to a person who receives the wrong type of blood? A. All the arteries constrict B. All the arteries dialates C. The RBCs agglutinate (Answer) D. The spleen and lymphnodes deteriorate
Last Answer : C. The RBCs agglutinate (Answer)
Description : Which of the following is/are acceptable reasons for the transfusion of red blood cells based on currently available data? A. Rapid, acute blood loss with unstable vital signs but no available ... increase wound healing. D. A hematocrit of 26% in an otherwise stable, asymptomatic patient.
Last Answer : Answer: AB DISCUSSION: Currently accepted guidelines for the transfusion of packed red blood cells include acute ongoing blood loss, as might occur in an injured patient, and the development of ... not be given based solely or predominantly on a numerical value such as a hematocrit of 28%
Description : A person suffering from a disease caused by Plasmodium, experiences recurring chill and fever at the time when (a) the sporozoites released from RBCs are being rapidly killed and broken down ... to enter fresh RBCs (d) the microgametocytes and megagametocytes are being destroyed by the WBCs
Last Answer : (c) the parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs
Description : HIV virus causes------? A. Hepatitis A B. Hepatitis B C. TB D. AIDS (Answer)
Last Answer : D. AIDS (Answer)
Description : AIDS virus is----------- A. Single-stranded RNA (Answer) B. Single-stranded DNA C. Double-stranded RNA D. Double-stranded DNA
Last Answer : A. Single-stranded RNA (Answer)
Description : Which form of drug abuse involves most risk of infection with the HIV (AIDS) virus ? A. Cigarette smoking B. Using alcholo C. Injection of heroine (Answer) D. Taking too much aspirin E. None of these
Last Answer : C. Injection of heroine (Answer)
Description : Mononucleosis is an infection of________ cells by the _____. a. T; cytomegalovirus b. B; Epstein-Barr virus c. Lung; cytomegalovirus d. red blood; Epstein.Barr virus
Last Answer : d. red blood; Epstein.Barr virus
Description : AIDS is caused by the Human Immunodeficiency Virus (HIV) The transmission of HIV infection generally occurs through. (a) eating contaminated food and water (b) transfusion of contaminated blood and blood products (c) inhaling polluted air (d) shaking hand with infected person
Last Answer : Ans:(b)
Last Answer : AIDS (Acquired Immuno Deficiency Syndrome) The bacterium is called HIV (Human Immuno Deficiency Virus). People living with HIV can stay healthy for many days. Due to the gradual loss of immunity in the body of ... virus enters the body, there is a flu-like fever , headache , and a slight body ache.
Description : When assisting the patient to interpret a negative HIV test result, the nurse informs the patient that the results mean a) his body has not produced antibodies to the AIDS virus. A negative test ... When antibodies to the AIDS virus are detected in the blood, the test is interpreted as positive.
Last Answer : a) his body has not produced antibodies to the AIDS virus. A negative test result indicates that antibodies to the AIDS virus are not present in the blood at the time the blood sample for the test is drawn.
Description : Cells formed in bone marrow include (a) RBCs (b) RBCs and leucocytes (c) leucocytes (d) lymphocytes
Last Answer : b) RBCs and leucocytes
Description : Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature? (1) They do not need to reproduce. (2) They are somatic cells. (3) They do not metabolise. (4) All their internal ... Only (1) (b) (1), (3) and (4) (c) (2) and (3) (d) Only (4)
Last Answer : (d) Only (4)
Description : Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature ? (a) They do not need to reproduce (b) They are somatic cells (c) They do not metabolize (d) All their internal space ... (a) (2) (a), (c) and (d) (3) (b) and (c) (4) only (d)
Last Answer : (4) only (d)
Description : The following statement(s) is/are true concerning HIV infection. a. Initial screening with ELISA is highly sensitive but can be associated with a false positive rate of 25% b. ... , carinii pneumonia, CMV pneumonitis, Cryptococcus meningitis, and disseminated infection due to atypical mycobacteria
Last Answer : Answer: b, c, d Acquired immunodeficiency syndrome (AIDS) is a syndrome caused by the human retrovirus (HIV-1) that infects T lymphocytes and causes severe immunosuppression. Individuals who ... to prolong survival when administered early in the course of disease and is considered routine therapy
Description : The AIDS viruses specifically attack which kind of cell? a) B cells b) helper T cells c) killer T cells d) macrophages
Last Answer : ANSWER: B -- HELPER T CELLS
Description : A healthy adult man has, on an average, _______ (in millions) of RBCs mm-3 of blood.
Last Answer : 5 – 5.5
Description : What happens to a person who receives the wrong type of blood? (1) All the arteries constrict (2) All the arteries dialates (3) The RBCs agglutinate (4) The spleen and lymphnodes deteriorate
Last Answer : (3) The RBCs agglutinate Explanation: Red blood cell agglutination indicates clumping of RBC's due to cold agglutinins which are most commonly IgM antibodies. These antibodies cross-link red ... tination is when the particles involved are red blood cells. The agglutin is called hemagglutinin..
Description : Increased RBC's in the blood leads to a condition called - (1) Anemia (2) Haemophilia (3) Polycythemia (4) Leukaemia
Last Answer : (3) Polycythemia Explanation: Polycythemia is an abnormally high concentration of hemoglobin in the blood through an increase in red cell numbers. People with this condition have thicker blood, which ... in the circulation by increasing or decreasing the rate of production by the bone marrow.
Description : People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million. This is because at high altitude ... required amount of O2 to survive (d) there is more UV radiation which enhances RBC production.
Last Answer : (c) atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive
Description : The lymph serves to (a) return the interstitial fluid to the blood (b) return the WBCs and RBCs to the lymph nodes (c) transport CO2 to the lungs (d) transport O2 to the brain
Last Answer : (a) return the interstitial fluid to the blood
Description : Which of the following statements is true for lymph? (a) WBC + serum (b) Blood – RBCs and some proteins (c) RBCs + WBCs + plasma (d) RBCs + proteins + platelets
Last Answer : (b) Blood – RBCs and some proteins
Description : Compared to blood our lymph has (a) plasma without proteins (b) more WBCs and no RBCs (c) more RBCs and less WBCs (d) no plasma
Last Answer : b) more WBCs and no RBCs
Description : Carbonic anhydrase occurs in (a) lymphocytes (b) blood plasma (c) RBCs (d) leucocytes.
Last Answer : (c) RBCs
Description : The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because O in it refers to having (a) overdominance of this type on the genes for A and B types (b) one antibody ... on the RBCs (c) no antigens A and B on RBCs (d) other antigens besides A and B on RBCs
Last Answer : (c) no antigens A and B on RBCs
Description : At high altitude, the RBCs in the human blood will (a) increase in number (b) decrease in number (c) increase in size (d) decrease in size.
Last Answer : (a) increase in number
Description : How the transport of O2 and CO2 by blood happens? (a) With the help of WBCs and blood serum (b) With the help of platelets and corpuscles (c) With the help of RBCs and blood plasma (d) With the help of RBCs and WBCs
Last Answer : (c) With the help of RBCs and blood plasma
Description : What is true about RBCs in humans? (a) They carry about 20-25 percent of CO2. (b) They transport 99.5 percent of O2. (c) They transport about 80 percent oxygen only and the rest 20 percent of it is transported in dissolved state in blood plasma. (d) They do not carry CO2 at all.
Last Answer : (a) They carry about 20-25 percent of CO2.
Description : Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as (a) bicarbonate in blood plasma and RBCs (b) free CO2 in blood plasma (c) 70% carbamino-haemoglobin and 30% as bicarbonate (d) carbamino-haemoglobin in RBCs.
Last Answer : (a) bicarbonate in blood plasma and RBCs
Description : Increased RBC’s in the blood leads to a condition called (1) Anemia (2) Haemophilia (3) Polycythemia (4) Leukaemia
Last Answer : Polycythemia
Last Answer : The RBCs agglutinate
Description : Common cold differs from pneumonia in that (a) pneumonia is a communicable disease whereas the common cold is a nutritional deficiency disease (b) pneumonia can be prevented by a live attenuated ... infects alveoli whereas the common cold affects nose and respiratory passage but not the lungs.
Last Answer : (d) pneumonia pathogen infects alveoli whereas the common cold affects nose and respiratory passage but not the lungs.
Description : The function of hemoglobin is------? A. Transportation of oxygen (Answer) B. Destruction of bacteria C. Prevention of anemia D. Utilization of energy
Last Answer : A. Transportation of oxygen (Answer)
Description : The main constituent of hemoglobin is------? A. Chlorine B. Iron (Answer) C. Calcium D. None of these
Last Answer : B. Iron (Answer)
Description : Defeciency of following vitamin decreases hemoglobin production ? A. Biotin B. Thiamine C. Niacin D. Pyridoxine (Answer) E. None of these
Last Answer : D. Pyridoxine (Answer)
Description : Human immunodeficiency virus destroys (A) Cytotoxic T cells (B) Helper T cells (C) B cells (D) Plasma cells
Last Answer : Answer : B
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
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
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
Description : 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 ... that decrease B-cell activity to a level at which the immune system is compatible with life.
Last Answer : a) lyse cells infected with virus. Cytotoxic T cells play a role in graft rejection.
Description : What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected person? -Science
Last Answer : HIV critically injures the immune system by infecting and eventually killing T-cells. Once the virus has infected a T cell, HIV copies its RNA into double stranded DNA copy by mearis ... the relentless attack of opportunistic pathogens or from the body’s inability to fight off malignancies.