Description : Which of the following tissues contain significant collagen useful for placing sutures to allow the prolonged tension necessary to maintain tissue approximation? a. Dermis b. Intestinal submucosa c. Muscular fascia d. Blood vessel wall
Last Answer : Answer: a, b, c, d It takes at least three weeks for collagen to undergo sufficient remodeling and cross linking to attain moderate strength. Since most skin sutures are removed at one to ... , Scarpa's fascia, and blood vessel wall represent a partial list of tissues with high collagen content
Description : Choose the drug which alters surface receptors on platelet membrane to inhibit aggregation, release reaction and to improve platelet survival in extracorporeal circulation: A. Dipyridamole B. Ticlopidine C. Aspirin D. Heparin
Last Answer : B. Ticlopidine
Description : Which of the following substances, not normally present in the circulation, trigger the initiating events in the hemostatic process? a. Thrombin b. Platelet factor 3 c. Tissue factor d. Collagen
Last Answer : Answer: c, d The initiating agents for hemostasis involve two substances that are not normally present in the circulation-collagen and tissue factor. Tissue factor is released from ... phospholipid surface to form the so-called prothrombinase complex which catalyzes the formation of thrombin
Description : Which of the following statement(s) is/are true concerning pharmacologic agents used to accelerate wound healing? a. A number of these agents are now currently approved for use in ... healing in chronic wounds d. Growth hormone functions by promoting fibroblast proliferation and collagen synthesis
Last Answer : Answer: b, c Currently there are no approved clinical agents that accelerate normal healing. Although a number of clinical trials are in progress, no agents are currently ... hormone administration significantly accelerates donor site healing, presumably due to its effects in minimizing catabolism
Description : Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at ... flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C
Last Answer : (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C
Description : Choose the correct statement about ticlopidine: A. It blocks GPIIb/IIIa receptors on platelet membrane B. It prevents ADP mediated platelet adenylylcyclase inhibition C. It inhibits thromboxane A2 synthesis in platelets D. It does not prolong bleeding time
Last Answer : B. It prevents ADP mediated platelet adenylylcyclase inhibition
Description : Hemostasis and the cessation of bleeding require which of the following processes? A. Adherence of platelets to exposed subendothelial glycoproteins and collagen with subsequent aggregation of platelets and ... conversion of fibrinogen to fibrin. D. Cross-linking of fibrin by factor XIII.
Last Answer : Answer: ABCD DISCUSSION: Hemostasis requires the interaction of platelets with the exposed subendothelial structures at the site of injury followed by aggregation of more platelets in that area. ... form a stable clot that incorporates the platelet plug and fibrin thrombus into a stable clot
Description : In 3rd generation dentin bonding agents, HEMA (Hydroxyethylmethacrylate) is 1. a hydrophilic monomer that wets the dentinal surface 2. a hydrophilic resin that forms a hybrid layer by chemically reacting the intertubular dentin. 3. a hydrophilic ... a. 1,2 b. 1,4 c. 2,3 d. 1,3 e. 3,4
Last Answer : b. 1,4
Description : .Which is most likely to be exposed on the surface of a gram-negative bacterium? A.Pore protein (porin) B.Protein involved in energy generation C.Lipoteichoic acid D.Phospholipids
Last Answer : A.Pore protein (porin)
Description : Which is most likely to be exposed on the surface of a gram-negative bacterium? A- Pore protein (porin) B- Protein involved in energy generation C- .Lipoteichoic acid D- Phospholipids
Last Answer : Pore protein (porin)
Description : Which of the following statement(s) is/are true concerning cell membrane receptors? a. The largest family of cell surface receptors are the G-protein-linked receptors b. Activities of the ... through the use adenylate cyclase d. Tyrosine kinase receptors are considered G-protein-linked receptors
Last Answer : Answer: a, c All water-soluble regulatory molecules bind to the cell surface receptor proteins. Binding of the appropriate ligand evokes an intracellular signal which usually regulates ... are adenylate cyclase, which converts ATP to cAMP, and the polyphosphoinositide-specific phospholipase C
Description : Match the following. (A) Inhibitor of (i) Ricin catalytic activity (B) Possess peptide (ii) Malonate bonds (C) Cell wall material (iii)Chitin in fungi (D) Secondary (iv) Collagen metabolite Choose the correct option from the following: (A) ... iv) (ii) (c) (iii) (iv) (i) (ii) (d) (ii) (iii) (i) (iv)
Last Answer : (A) Inhibitor of (i) Ricin catalytic activity
Description : A protein having both structural and enzymatic traits is (A) Myosin (B) Collagen (C) Trypsin (D) Actin
Last Answer : Answer : A
Description : Which of the following protein is rich in cysteine? (A) Elastine (B) Collagen (C) Fibrin (D) Keratin
Last Answer : Answer : D
Description : The most abundant protein in bones is (A) Collagen type I (B) Collagen type II (C) Collagen type III (D) Non-collagen proteins
Description : A protein rich in hydroxyproline is (A) Prolamin (B) Procollagen (C) Collagen (D) Proinsulin
Last Answer : Answer : C
Description : The most abundant protein in mammals is (A) Albumin (B) Haemoglobin (C) Collagen (D) Elastin
Description : A protein rich in cysteine is (A) Collagen (B) Keratin (C) Haemoglobin (D) Gelatin
Last Answer : Answer : B
Description : Factors that decrease collagen synthesis include all of the following except: A. Protein depletion. B. Infection. C. Anemia. D. Advanced age. E. Hypoxia.
Last Answer : Answer: C DISCUSSION: Collagen synthesis, an integral part of wound healing, is affected by many local and systemic factors. Protein depletion impairs fibroplasia. Hypoproteinemia leads to diminution of ... more than any other factor, wound infection is associated with the risk of wound failure
Description : Which one is the most abundant protein in the animal world? (a) Trypsin (b) Haemoglobin (c) Collagen (d) Insulin
Last Answer : (c) Collagen
Description : Which one of the following is the most abundant protein in the animals? (a) Haemoglobin (b) Collagen (c) Lectin (d) Insulin
Last Answer : (b) Collagen
Description : Collagen is (a) fibrous protein (b) globular protein (c) lipid (d) carbohydrate.
Last Answer : (a) fibrous protein
Description : Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of (A) Collagen (B) Tannin (C) Molasses (D) Carbohydrate
Last Answer : (A) Collagen
Description : The most abundant protein in the body is Options: 1) Albumin 2) Globulin 3) Collagen 4) Fibrinogen
Last Answer : Correct Answer: 3) Collagen
Description : This major protein component of connective tissue in mammals comprises most of the organic matter of skin, tendons, bones, and teeth, and occurs as fibrous inclusions in most other body structures. Is this material: a) elastin b) collagen c) fatty acids d) keratin
Last Answer : ANSWER: B -- collagen
Description : Vessel pitch can be controlled by either the 'bridge or engine room thrust lever' shown in the illustration; but only with one engine on the line whether in 'cruise or maneuver' mode. The cause is most likely a faulty relay _____________. EL-0095 A. #1 B. #2 C. #3 D. #4
Last Answer : Answer: D
Description : A patient with gross fecal contamination and peritonitis from a ruptured sigmoid diverticulum has his midline wound left open to heal by secondary intention. Which of the following statement(s) describes this ... of a wound to form granulation tissue is dependent on the blood supply of the tissue
Last Answer : Answer: b, d Open wounds, whether they be ulcers or open surgical incisions closing by secondary intention, heal with the same sequence of inflammation, matrix deposition, epithelialization ... via bacterial and phagocytic cell products such as proteases, collagenases, elastases, and other enzymes
Description : One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m-1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is (A) 100 (B) 900 (C) 9000 (D) 10000
Last Answer : (D) 10000
Description : A covering of concrete placed on the exposed top of an external wall, is known as (A) Cornice (B) Coping (C) Frieze (D) Linte
Last Answer : Answer: Option B
Description : What will happen if the stretch receptors of the urinary bladder wall are totally removed
Last Answer : What will happen if the stretch receptors of the urinary bladder wall are totally removed A. ... will continue to collect normally in the bladder
Last Answer : What will happen if the stretch receptors of the urinary bladder wall are totally removed A. There ... D. Urine will not collect in the bladder
Description : What will happen if the stretch receptors of the urinary bladder wall are totally removed? (a) Micturition will continue. (b) Urine will continue to collect normally in the bladder. (c) There will be no micturition. (d) Urine will not collect in the bladder.
Last Answer : (a) Micturition will continue.
Description : SRP receptors involved in protein export are present on (A) Ribosomes (B) Endoplasmic reticulum (C) Golgi appartus (D) Cell membrane
Description : Astimulatory G-protein transduces the signals from (A) α1-and β1-adrenergic receptors (B) α2-and β2-adrenergic receptors (C) α1-and α2-adrenergic receptors (D) β1-and β2-adrenergic receptors
Description : Binding of thyroxine to its receptors (A) Activates Adenylate cyclase (B) Activates guanylate cyclase (C) Activates a stimulatory G-protein (D) Increases transcription
Description : The only correct statement about hormone receptors is (A) Receptors for protein hormones are present in cytosol (B) Receptors for steroid hormones are membrane bound (C) Hormone-receptor binding is irreversible (D) Receptors can undergo down regulation and up regulatoin
Description : Most hormone receptors are localized on the cell membrane and transduce hormone binding into altered levels of intracellular messengers. A limited number of intracellular receptors do exist. Which of ... protein serves as an inhibitor protein blocking the DNA-binding domain of the steroid receptor
Last Answer : Answer: a, d Although most hormone and other messenger receptors are extracellular, intracellular receptors have been identified. The hormone messengers involved for these receptors are primarily ... DNA-binding domain of the receptor. Activation involves the dissociation of the inhibitor protein
Description : a1 – receptors are coupled with _______ G protein. (a) Gs (b) Gi (c) Gq (d) Go
Last Answer : Ans: C
Description : The following are true about the aqueous: a. the protein content of aqueous is about 1/5 that of the plasma b. the main type of protein found in the aqueous is transferrin c. Ig G is found in the aqueous d. stimulation of 2 receptors reduces aqueous production
Last Answer : stimulation of 2 receptors reduces aqueous production
Description : With regard to membrane receptors for hormones: a. they are often glycoproteins b. they are important for hormones made up of steroid c. those for insulin exhibit an intrinsic protein kinase activity d. glucagon uses calcium as a second messenger
Last Answer : they are often glycoproteins
Description : Acquired immunity usually involves protein receptors on B and T cells that recognize discrete regions of the antigen called _____. a. haptens b. epitopes c. antibodies d. protein receptors
Last Answer : b. epitopes
Description : Which one of the following drugs does NOT act through G-Protein coupled receptors? (A) Epinephrine (B) Insulin (C) Dopamine (D) TSH
Last Answer : (B) Insulin
Description : The following statement about histamine is not correct: A. It is the sole mediator of immediate hypersensitivity reaction B. It plays no role in delayed hypersensitivity reaction C. It serves as a neurotransmitter in the brain D. All types of histamine receptors are G protein coupled receptors
Last Answer : A. It is the sole mediator of immediate hypersensitivity reaction
Description : Agonist induced autophosphorylation, internalization and down regulation is a distinctive feature of: A. G-protein coupled receptors B. Intrinsic ion channel containing receptors C. Tyrosine protein kinase receptors D. Receptors regulating gene expression
Last Answer : C. Tyrosine protein kinase receptors
Description : The following are true about atherosclerosis: C A. it often occurs in the heart chamber B. foamy macrophages are not seen in the lesion C. smooth muscle cells proliferation in the intima of vessel D. no deposition of lipid occurs in wall of blood vessel
Last Answer : smooth muscle cells proliferation in the intima of vessel
Description : Bordered pits are found in (a) sieve cells (b) vessel wall (c) companion cells (d) sieve tube wall.
Last Answer : (b) vessel wall
Description : Bordered pits are found in (a) sieve cells (b) vessel wall (c) companion cells (d) sieve tube wall
Description : Which of the following terms refers to a muscular, cramp-like pain in the extremities consistently reproduced with the same degree of exercise and relieved by rest? a) Intermittent claudication Intermittent ... or dilated vessel. d) Ischemia Ischemia is a term used to denote deficient blood supply.
Last Answer : a) Intermittent claudication Intermittent claudication is a sign of peripheral arterial insufficiency.