Practice Start Test

Chemical Coordination and Integration

NEET Biology · 79 questions · Page 2 of 8 · Click an option or "Show Solution" to reveal answer

Q11
Which one of the following is not a second messenger in hormone action?
A Calcium
B Sodium
C cAMP
D cGMP
Correct Answer
Option B
Solution

(b) Calcium, cAMP and cGMP act as second messengers. Sodium has no role in hormonal action.

Q12
A steroid hormone which regulates glucose metabolism is
A corticosterone
B 11-deoxycorticosterone
C cortisone
D cortisol
Correct Answer
Option D
Solution

(d) Cortisol is secreted by adrenal cortex and plays an important role in carbohydrate metabolism.

Q13
Which one of the following hormones though synthesised elsewhere is stored and released by the master gland?
A Luteinizing hormone
B Prolactin
C Melanocyte stimulating hormone
D Antidiuretic hormone
Correct Answer
Option D
Solution

(d) ADH and oxytocin are produced by hypothalamus and stored in posterior pituitary.

Q14
Which one of the following pairs of hormones can easily pass through the cell membrane and bind to a receptor inside?
A Insulin, glucagon
B Thyroxin, insulin
C Somatostatin, oxytocin
D Cortisol, testosterone
Correct Answer
Option D
Solution

(d) Cortisol and testosterone are steroid hormones which are lipid soluble and pass through the cell membrane.

Q15
Select the correct statement.
A Glucagon is associated with hyperglycemia.
B Insulin acts on liver cells and adipocytes.
C Insulin is associated with hypoglycemia.
D Glucocorticoids stimulate gluconeogenesis.
Correct Answer
Option D
Solution

(d) Glucocorticoids stimulate gluconeogenesis, increasing blood sugar level.

Q16
Mainly which type of hormones control the menstrual cycle in human beings?
A FSH
B LH
C FSH, LH, estrogen
D Progesterone
Correct Answer
Option C
Solution

(c) FSH, LH, and estrogens control the menstrual cycle in human beings.

Q17
Melanin protects us from
A U.V. rays
B visible rays
C infrared rays
D X-rays
Correct Answer
Option A
Solution

(a) Melanin mainly protects the skin from harmful effects of UV-rays.

Q18
Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?
A Insulin - Diabetes insipidus
B Relaxin - Gigantism
C Prolactin - Cretinism
D Parathyroid hormone - Tetany
Correct Answer
Option D
Solution

(d) Deficiency of parathyroid hormone causes tetany with sustained contraction of muscles.

Q19
Which of the following hormones is not a secretion product of human placenta?
A Human chorionic gonadotropin
B Prolactin
C Estrogen
D Progesterone
Correct Answer
Option B
Solution

(b) Prolactin is secreted from anterior pituitary, not the placenta.

Q20
The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone :
A calcitonin
B prolactin
C adrenaline
D melatonin
Correct Answer
Option D
Solution

(d) Melatonin is a hormone produced by pineal gland that regulates the 24 hour sleep-wake cycle.

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