Author: qnasb27

Cells normally found in an atheromatous plaque include all the following, except A. smooth muscle cells. B. foam cells. C. macrophages. D. lymphocytes. E. platelets.

Vitamin C deficiency results in A. a decreased number of collagen fibres. B. an increased elastin:collagen ratio. C. formation of defective collagen fibres. D. detachment of ribosomes in fibroblasts. E....

The first-born infant of an Rh-negative 26 year old woman, who had two previous second trimester abortions, has severe haemolysis and circulatory failure. This most likely could have been prevented by...

Raynaud disease characteristically: A. occurs almost entirely in young male cigarette smokers. B. is associated with atherosclerosis. C. occurs primarily in tropical climates. D. is the result of a vasospastic...

Reduction in the neutrophil granulocyte count may be A. Caused by drugs suppressing bone marrow activity. B. A consequence of tissue damage. C. Associated with painful throat ulcers. D. Associated with...

Rejection of a transplanted organ is made less likely by A. Treatment which reduces the blood lymphocyte count. B. Keeping the recipient in a germ-free environment. C. Irradiation of the transplanted organ...

Respiratory alkalosis differs from metabolic alkalosis in that the A. Likelihood of tetany is less. B. Urine is alkaline. C. Arterial blood [HCO3 ] is normal or low. D. Arterial blood PCO2 is reduced....

In investigating a patient’s acid-base status A. Venous rather than arterial blood should be studied. B. Blood samples may be stored for up to 12 hours at room temperature before analysis. C. pH can...

Cerebrospinal fluid A. Is an ultrafiltrate of plasma. B. Is the main source of the brain’s nutrition. C. Has the same pH as arterial blood. D. Has a higher glucose concentration than has plasma. E. Has...

Blood eosinophils A. Have agranular cytoplasm. B. Are about a quarter of all leukocytes. C. Are relatively abundant in the mucosa of the respiratory, urinary and alimentary tracts. D. Release cytokines....

Antigens A. Are usually proteins or polypeptide molecules. B. Can only be recognized by immune system cells previously exposed to that antigen. C. Are normally absorbed from the gut via lymphatics and...

The pH A. Of arterial blood normally ranges from 7.2 to 7.6. B. Units express [H ] in moles/litre. C. Of blood is directly proportional to the PCO2. D. Of blood is directly proportional to [HCO3 ]. E....

The cell membranes in skeletal muscle A. Are impermeable to fat-soluble substances. B. Are more permeable to sodium than to potassium ions. C. Become more permeable to glucose in the presence of insulin....

Blood A. Makes up about 7 per cent of body weight. B. Forms a higher percentage of body weight in fat than in thin people. C. Volume can be calculated by multiplying plasma volume by the haematocrit (expressed...

The specific gravity (relative density) of A. Red cells is less than that of plasma. B. Plasma is due more to its protein than to its electrolyte content. C. Plasma decreases as extracellular fluid and...

Lymphocytes A. Constitute 1–2 per cent of circulating white cells. B. Are motile. C. Can transform into plasma cells. D. Decrease in number following removal of the adult thymus gland. E. Decrease in...

Which of the following does not inhibit platelet activation? a. Ecto-ADPase b. Prostacyclins c. Nitric oxide d. ADP

Which of the following is true about von Willebrand factor? a. It cross links platelet to each other b. It is functional in large multimeric form c. Plasma VWF is derived from platelets d. It carries factor...

In TTP, anemia is due to: a. Autoimmunity b. Hypersplenism c. Bleeding d. Platelet aggregates (microangiopathy)

Which of the following is not a first line therapy in ITP? a. IVIg b. Anti-D c. Rituximab d. Steroids