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Q. No.A scientist develops a drug that she thinks might inhibit the release of gonadotrophin-releasing hormone (GnRH) from the hypothalamus. Some volunteer female subjects take the drug. Which of the following results obtained from the volunteers would support the scientist hypothesis?
1. Increased levels of oestrogen in the blood
2. Earlier onset on menstruation
3. Follicle development
4. Decreased levels of luteinizing hormone (LH) in the blood
Subtopic: Adenohypophysis & Hypothalamus |
74%
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The secretion of a less than normal amount of the hormone gastrin would have which effect?
1. Stomach pH would decrease
2. Protein digestion in the stomach would decrease
3. Secretion of alkaline mucus in the stomach would increase
4. Carbohydrate digestion in the stomach would increase
1. Stomach pH would decrease
2. Protein digestion in the stomach would decrease
3. Secretion of alkaline mucus in the stomach would increase
4. Carbohydrate digestion in the stomach would increase
Subtopic: Misc. Hormones |
64%
From NCERT
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Some atheletes take steroids in an attempt to enhance their physical performance. This can lead to decreased sperm production and even sterility. What is the most likely explanation for this effect?
1. Increased stimulation of anterior pituitary to produce LH
2. Excessive growth of testicular tissue
3. Suppression of the natural production of thyroxine due to the destruction of thyroid tissue
4. Interference in the proper negative feedback control of testosterone
1. Increased stimulation of anterior pituitary to produce LH
2. Excessive growth of testicular tissue
3. Suppression of the natural production of thyroxine due to the destruction of thyroid tissue
4. Interference in the proper negative feedback control of testosterone
Subtopic: Misc. Hormones |
66%
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If you were outside for a long time on a hot, dry day, without anything to drink, which of the following would happen?
1. The osmotic pressure of your blood would decrease
2. The production of thyroxine by your thyroid gland would increase
3. The secretion of ADH from your pituitary gland would increase
4. The reabsorption of fluids from your kidney tubules would decrease
1. The osmotic pressure of your blood would decrease
2. The production of thyroxine by your thyroid gland would increase
3. The secretion of ADH from your pituitary gland would increase
4. The reabsorption of fluids from your kidney tubules would decrease
Subtopic: Adenohypophysis & Hypothalamus |
76%
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In a hormonal control system, hormone A inhibits the secretion of substance B. If this system works by positive feedback, which of the following would be correct?
1. Levels of B will stabilize at a moderate level
2. Substance B stimulates the production of hormone A
3. Secretion of substance B should stop completely
4. Levels of hormone A should not be affected by the levels of substance B
1. Levels of B will stabilize at a moderate level
2. Substance B stimulates the production of hormone A
3. Secretion of substance B should stop completely
4. Levels of hormone A should not be affected by the levels of substance B
Subtopic: Mechanism of Hormone Action |
58%
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A scientist develops a new drug, and finds that when it is administered in human there is a substantial increase in the volume of urine produced. When he administers ADH/vasopressin at the same time, the volume of urine returns to normal. Which hypothesis best fits these observations? The new drug:
1. Blocks the receptors for ADH on the collecting tubules of the kidney
2. Blocks the release of ADH from the pituitary
3. Mimics the action of ADH
4. Decrease blood pressure
1. Blocks the receptors for ADH on the collecting tubules of the kidney
2. Blocks the release of ADH from the pituitary
3. Mimics the action of ADH
4. Decrease blood pressure
Subtopic: Adenohypophysis & Hypothalamus |
59%
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Steroid hormone :
1. Include testosterone, estrogen and growth hormone
2. Are only produced in the pituitary gland
3. Pass easily through cell membrane to act in the nucleus
4. Stimulate liver cells to convert glucose to glycogen
1. Include testosterone, estrogen and growth hormone
2. Are only produced in the pituitary gland
3. Pass easily through cell membrane to act in the nucleus
4. Stimulate liver cells to convert glucose to glycogen
Subtopic: Mechanism of Hormone Action |
79%
From NCERT
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Read the following statements:
i. Oxytocin is called 'milk ejection hormone'
ii. Epinephrine is methylated nor-epinephrine
iii. The endocrine portion of pancreas consists of Islets of Langerhans (98-99%) whereas, exocrine portion of pancreas consists of pancreatic acini (1-2%).
iv. Thyroid regulates BMR
v. Testosterone exerts a feedback inhibitory effect on LH (ICSH) secretion
How many of the above statements are correct?
1. Four
2. Three
3. Two
4. One
i. Oxytocin is called 'milk ejection hormone'
ii. Epinephrine is methylated nor-epinephrine
iii. The endocrine portion of pancreas consists of Islets of Langerhans (98-99%) whereas, exocrine portion of pancreas consists of pancreatic acini (1-2%).
iv. Thyroid regulates BMR
v. Testosterone exerts a feedback inhibitory effect on LH (ICSH) secretion
How many of the above statements are correct?
1. Four
2. Three
3. Two
4. One
Subtopic: Adenohypophysis & Hypothalamus | Thyroid Gland Part I | Thyroid Gland Part II | Misc. Hormones | Pancreas |
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Identify A, B, C and D in the table :
| Progesterone | Estrogen |
| A | B |
| Mainly produced by ruptured and emptied graafian follicles called Corpus luteum | C |
| Controls the growth and maintenance of endometrium | Controls the appearance and maintenance of secondary sex characters |
| D | Secretion is mainly controlled by FSH |
| Options | A | B | C | D |
| 1. | Secreted by ovary after ovulation | Secreted by ovary prior to and after ovulation | Mainly produced by growing Graafian follicles | Secretion is mainly controlled by LG |
| 2. | Secreted by ovary to ovulation | Secreted by ovary only after ovulation | Mainly produed by ruptured Graafian follicles | Secretion is mainly controlled by ICSH |
| 3. | Secreted by hypothalamus | Secreted by ovary | Mainly produed by uterus | Secretion is mainly controlled by ICSH |
| 4. | Secreted by ovary and pituitary | Secreted by hypothalamus | Mainly produed by uterus | Secretion is mainly controlled by LH |
Subtopic: Misc. Hormones |
76%
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Assertion (A): Endocrine glands are ductless glands.
Reason (R): Hormones of endocrine glands directly enter in the blood circulation.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason (R): Hormones of endocrine glands directly enter in the blood circulation.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Intro to Hormones & Endocrine Glands |
83%
From NCERT
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