medical MCQs – Page 348

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 Review each marked answer and report any item that may be outdated or unclear.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

6941. Which of the following results due to excessive parathormone secretion_______________?
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A. Increased serum calcium

B. Increased excretion of phosphates

C. Increase excretion of calcium

D. Decrease excretion of calcium

6942. Peristalsis involves coordinated contraction and relaxation______________?
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A. None of the above

B. Dorsal and ventral to food bolus

C. Lateral and medial to food bolus

D. Above and below the food bolus

6943. Pancreas produce_____________?
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A. All of the above

B. Pepsinogen

C. Chymotrypsinogen

D. Hydrochloric acid

6944. Aldosterone______________?
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A. Increases reabsorption of sodium

B. Increases exceretion of potassium

C. Increases retention of sodium

D. Both A and B

6945. Oxygen dissociation cure is shifted to the right in all except_____________?
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A. Increase of 2, 3 3 DPG

B. Fall in pH

C. HbF

D. Rise in temperature

6946. Cyanosis or bluish coloration of skin and mucus membrane depends upon______________?
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A. The relative proportion of reduced and oxygenated hemoglobin

B. Thickness of the skin

C. The absolute amount of reduced hemoglobin

D. Fragility of capillaries

6947. Histamine stimulate the secretion of_______________?
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A. HCL by stomach

B. Pancreatic enzymes

C. Amylase by salivary gland

D. Gastrin by stomach

6948. Aldosterone secretion is increased when there is a fall in____________?
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A. Plasma K+

B. Plasma Na+

C. pH of the plasma

D. Angiotensin II level

6949. The best stimulator of respiratory center is____________?
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A. Increase in arterial carbon dioxide level

B. Decrease in arterial carbon dioxide level

C. Increase in arterial oxygen level

D. None of the above

6950. The final sugars in intestinal chyme are____________?
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A. Ribose & xylulos

B. Glucose & fructose

C. Ribose & mannose

D. Xylulose & fructose

6951. Insulin increases the activity of___________?
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A. HMG. CoA reductase

B. HMG- CoA synthase

C. HMG- CoA lyase

D. Thiolase

6952. Carotid body function in an organ work as_______________?
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A. Differential pressure of oxygen in in tissue fluids

B. Differential pressure of oxygen in in hemoglobin synthesis

C. Differential pressure of oxygen in arterial blood

D. Differential pressure of oxygen in venous blood

6953. Limitation of inspiration by vagal lung inflation signals is called the______________?
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A. Bainbridge reflex

B. Dynamic stretch reflex

C. Autonomic reflex

D. Herring Breur reflex

6954. All are seen in Cushing s syndrome except_______________?
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A. Truncal obesity

B. Hypoglycemia

C. Hypertension

D. Poor wound healing

6955. Bile salt repeats its cycle in____________?
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A. 4 times a day

B. 8 times a day

C. 10 times a day in fasting

D. 2 times in between meals

6956. Progesterone production in the ovary is primarily by______________?
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A. Mature follicles

B. Corpora lutea

C. Corpora albicans

D. Stroma

6957. All are actions of CCK except_______________?
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A. Causes GB contraction

B. Increased pancreatic secretion

C. Relax lower esophageal sphincter

D. Increased gastric secretion

6958. Hormones FSH & LH of anterior pituitary gland acts on___________________?
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A. Testis but not ovaries

B. Ovaries but not testis

C. Both Testis and ovaries

D. Adrenal cortex

6959. Adrenal gland has two parts; cortex and medulla. Which of the following is correct______________?
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A. Cortex is under the control of ACTH

B. Both cortex and medulla are under the control of autonomic nervous system

C. Cortex is exocrine and medulla is endocrine

D. All of the above

6960. Alveolar O2 tension is______________?
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A. Not affected by respiratory depression

B. Increased by hyperventilation

C. Decreased by hyperventilation

D. Similar to venous O2 tension

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