The 24-hours (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone:
1. melatonin
2. calcitonin
3. prolactin
4. adrenaline
Select the correct matching of a hormone, its source and its function:
Hormone | Source | Function | |
1. | Norepineph rine |
Adrenal medulla | Increases heartbeat, rate of respiration and alertness |
2. | Glucagon | Beta-cells of Islets of Langerhans |
Stimulates glycogenolysis |
3. | Prolactin | Posterior pituitary |
Regulates growth of mammary glands and milk formation in females |
4. | Vasopressin | Posterior pituitary |
Increases loss of water through urine |
Endocrine gland | Hormone | Functions | |
1. | Placenta | estrogen | initiates secretion of milk |
2. | Corpus luteum | estrogen | essential for the maintenance of endometrium |
3. | Leydig cells | androgen | initiates the production of sperm |
4. | Ovary | FSH | stimulates follicular development and the secretion of estrogens |
1. | Increases blood glucose levels by stimulating glucagon production |
2. | Decreases blood glucose levels by forming glycogen |
3. | Increases blood glucose level by promoting cellular uptake of glucose |
4. | Increases blood glucose levels by hydrolysis of glycogen |
Which hormone causes dilation of blood vessels, increased oxygen consumption, and glucogenesis?
1. ACTH
2. Insulin
3. Adrenalin
4. Glucagon
Which of the following is an accumulation and release centre of neurohormones?
1. | Posterior pituitary lobe |
2. | Intermediate lobe of the pituitary |
3. | Hypothalamus |
4. | Anterior pituitary lobe |
Which one of the following is not a second messenger in hormone action?
1. cGMP
2. Calcium
3. Sodium
4. cAMP
A steroid hormone which regulates glucose metabolism is:
1. cortisol
2. corticosterone
3. 11-deoxycorticosterone
4. cortisone
Which one of the following does not act as a neurotransmitter?
1. Acetylcholine
2. Epinephrine
3. Nor epinephrine
4. Cortisone