Medical MCQs

5099 MCQs  (Page 449 of 510)

The most significant immediate result of lowered serum calcium is_______________?
A. Weakened heart action
B. Decalcification of bones
C. Decalcification of teeth
D. Hyperirritability of nerves and muscles
Hormone responsible for milk ejection______________?
A. Oxytocin
B. Estrogen
C. Progesterone
D. Prolactin
Aldosterone secretion is increased when there is a fall in____________?
A. Plasma k+
B. Plasma na+
C. Ph of the plasma
D. Angiotensin ii level
Removal of parathyroid gland produces the following changes EXCEPT_________________?
A. Decline plasma calcium level
B. Decrease in plasma phosphate level
C. Neuromuscular hyperexcitability
D. Hypo calcemic tetany
Hormones FSH & LH of anterior pituitary gland acts on___________________?
A. Testis but not ovaries
B. Ovaries but not testis
C. Both testis and ovaries
D. Adrenal cortex
Hyperthyroidism can be caused by____________?
A. Clonidine
B. Amiodarone
C. Hydralazine
D. Penicillamine
Insulin increases the activity of___________?
A. Hmg. coa reductase
B. Hmg- coa lyase
C. Hmg- coa synthase
D. Thiolase
Noradrenaline is differentiated from adrenaline by increasing___________?
A. Heart rate
B. Cardiac output
C. Peripheral resistance
D. All of the above