medical MCQs – Page 349

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

6961. The supraoptic nucleus of the hypothalamus is believed to control secretion of which of the following hormones ?
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A. Growth hormone

B. Oxytocin

C. Adreno corticotrophic hormone

D. Antidiuretic hormone

6962. Reverse T3 is__________________?
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A. Isomerisation product of T3 and active

B. Reverse of T3

C. Synthetic derivative

D. Isomerisation product of T3 and inactive

6963. Which of the following hormones act via cAMP ?
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A. Adrenalin

B. Vasopressin

C. Parathormone

D. Insulin

6964. What effect does hyperventilation have on the oxygen binding affinity of hemoglobin ?
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A. P50 increase and the oxygen affinity decreases

B. P 50 decreases and the oxygen affinity increases

C. P50 and oxygen affinity decrease

D. P 50 and oxygen affinity increase

6965. Hypoxia is characterized by ___________?
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A. All of the above

B. Favorable response to 100% oxygen

C. Low arterial PO2

D. Intense chemoreceptor response

6966. Hormone released during increased stress is_____________?
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A. Somatostatin

B. Thyroxine

C. Growth hormone

D. Cortisol

6967. A phaeochromocytoma is a tumour of the____________?
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A. None of the above

B. Parathyroids

C. Adrenal cortex

D. Pituitary

6968. Pepsinogen is activated by ___________________ ?
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A. Enterokinase

B. Chymotrypsin

C. Trypsin

D. Low pH

6969. Menopausal hormonal relations are______________?
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A. Lh/FSH increase

B. Gonadotropins increase , estrogens decrease

C. Estrogens and gonadotropins decrease

D. Both increase

6970. A diet deficient in calcium will result in_____________?
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A. Production of parathyroid hormone and bone resorption

B. Increased ability to cross link fibrin

C. Production of Calcitonin and a low blood calcium level

D. Stimulation of the thyroid gland

6971. Glucocorticoids have all the following actions except_______________?
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A. Anti insulin action in peripheral tissues

B. Increase in protein catabolism

C. Decrease in glucose uptake by the heart

D. Increase in blood glucose level

6972. Oxygen affinity is increased by all except_________________?
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A. Increased HbF

B. Hypothermia

C. Hypoxia

D. Alkalosis

6973. Thyroxine causes all the following except______________?
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A. Increased basal metabolism

B. Increased oxygen consumption

C. Decreased cell metabolism

D. Increased pulmonary ventilation

6974. Epinephrine is most closely related in structure to ____________________?
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A. Tyrosine

B. Glycerol

C. Methionine

D. Niacin

6975. Oxygen affinity decreases in_________________?
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A. HbF

B. Hypoxia

C. Increased pH

D. Hypothermia

6976. Glucocorticoids decrease inflammatory reaction by reducing_______________?
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A. Fibroblastic activity

B. Activity of histamine

C. Release of histamine

D. Neutrophils

6977. Bile acids are derived from_____________?
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A. Cholesterol

B. Bile salts

C. A & B

D. Bile pigments

6978. The most important function of hydrochloric acid in the stomach is_______________?
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A. Neutralization of chyme

B. Stimulation of pancreatic secretion

C. Activation of pepsinogen

D. Destruction of bacteria

6979. The effect which is seen due to decrease in serum calcium concentration is_______________?
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A. Depression of Nervous system

B. Increase the renal absorption

C. Relaxation of muscle

D. Excitability of the muscle

6980. Most potent stimulus for secretin is______________?
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A. Fat

B. Dilattion of intestine

C. Protein

D. Acid chyme

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