Q. No.Which one of the following is not a second messenger in hormone action?
1. cGMP
2. Calcium
3. Sodium
4. cAMP
1. cGMP
2. Calcium
3. Sodium
4. cAMP
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Which one of the following statements is correct?
| 1. | Neurons regulate endocrine activity, but not vice versa. |
| 2. | Endocrine glands regulate neural activity, and nervous system regulates endocrine glands. |
| 3. | Neither hormones control neural activity nor do the neurons control endocrine activity. |
| 4. | Endocrine glands regulate neural activity, but not vice versa. |
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Which one of the following is an example of negative feedback loop in humans?
1. Secretion of sweat glands and constriction of skin blood vessels when it is too hot.
2. Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold.
3. Secretion of tears after falling of sand particles into the eye.
4. Salivation of mouth at the sight of delicious food.
Select the correct matching of a hormone, its source and function.
|
Hormone |
Source |
Function |
|
|
1. |
Norepinephrine |
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 |
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Given below is an incomplete table about certain hormones, their source glands and one major effect of each on the body in humans. Identify the correct option for the three blanks A, B and C.
|
Glands |
Secretion |
Effect on body |
|
Ovary |
A |
Maintenance of secondary sexual characters |
|
Alpha cells of islets of Langerhans |
B |
Raises blood sugar level |
|
Anterior pituitary |
C |
Oversecretion leads to gigantism |
|
A |
B |
C |
|
|
1. |
Vasopressin |
Glucagon |
Calcitonin |
|
2. |
Oestrogen |
Glucagon |
Growth hormone |
|
3. |
Testosterone |
Insulin |
Vasopressin |
|
4. |
Oestrogen |
Insulin |
Calcitonin |
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The 24 h (diurnal) rhythm of our body such as the sleep wake cycle is regulated by the hormone
1. Melatonin
2. Calcitonin
3. Prolactin
4. Adrenaline
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A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abnormal skin. This is the result of
1. Deficiency of iodine in diet
2. Low secretion of growth hormone
3. Cancer of the thyroid gland
4. Over secretion of pars distalis
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A chemical signal that has both endocrine and neural roles is
| 1. | Melatonin | 2. | Calcitonin |
| 3. | Epinephrine | 4. | Cortisol |
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Which one of the following hormones though synthesized elsewhere, is stored and released by the master gland?
1. Melanocyte stimulating hormone
2. Antidiuretic hormone
3. Luteinizing hormone
4. Prolactin
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The amino acid tryptophan is the precursor for the synthesis of
1. Melatonin and serotonin
2. Thyroxine and triiodothyronine
3. Estrogen and progesterone
4. Cortisol and cortisone
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