Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?
(a) Insulin | Glucagon |
(b) Aldosterone | Atrial natriuretic factor |
(c) Relaxin | Inhibin |
(d) Parathormone | Calcitonin |
1. a
2. b
3. c
4. d
Match the source gland with its respective hormone as well as the function.
Source gland |
Hormone | Function | |
(a) | Posterior pituitary |
Vasopressin | Stimulates reabsorption of water in the distal tubules in the nephron |
(b) | Corpus luteum |
Prolactin | Supports pregnancy |
(c) | Thyroid | Thyroxine | Regulates blood calcium level |
(d) | Anterior pituitary |
Oxytocin | Contraction of uterus muscles during childbirth |
1. (a)
2. (b)
3. (c)
4. (d)
Which one of the following is an example of a negative feedback loop in humans?
1. | Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold |
2. | Secretion of tears after falling of sand particles into the eye |
3. | Salivation of the mouth at the sight of delicious food |
4. | secretion of sweat glands and constriction of the skin blood vessels when it is too hot |
Which one of the following does not act as a neurotransmitter?
1. Acetylcholine
2. Epinephrine
3. Nor epinephrine
4. Cortisone
Which of the following hormone secretes a gastric secretion?
1. Entero gastrone
2. Gastrin
3. CCK-PZ
4. Villikinin
Steroid hormones work as:
1. They enter into target cells and bind with specific receptors and activate specific genes to form protein
2. They bind to cell membrane
3. They catalyze the formation of cAMP
4. None of the above
Adrenaline and noradrenaline are hormones that act as:
1. Energy-producing agents
2. Food storage materials
3. Neurotransmitters
4. Energy-storing substances
Calcitonin is a thyroid hormone, which:
1. elevates potassium level in blood
2. lowers calcium level in blood
3. elevates calcium level in blood
4. has no effect on calcium
The contraction of the gall bladder is due to:
1. gastrin
2. secretin
3. cholecystokinin
4. enterogastrone
Glycogenolysis involves:
1. conversion of sugar into glycogen
2. oxidation of sugar
3. conversion of glycogen into sugar
4. conversion of glycogen into fat