Free Chemical Coordination and Hormones MCQs with Answers
257 Chemical Coordination and Hormones MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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257 questions · page 10 of 13
- A. Grave's disease
- B. Goiter
- C. Hyperglycemia
- D. Dwarfism
Explanation: Hyperglycemia is caused by under production of insulin hormone. Option B is correct as iodine deficiency is the most common cause of…
Correct answer: Goiter- A. Parathormone
- B. Adrenaline
- C. Thyroxin
- D. Thiamin
- E. Prolactin
Explanation: Circulating parathyroid hormone targets the distal convoluted tubule and collecting duct, directly increasing calcium reabsorption.
Correct answer: Parathormone- A. Prolactin
- B. LH (Luteinizing Hormone)
- C. FSH (Follicle-Stimulating Hormone)
- D. Oxytocin
Explanation: Oxytocin is the hormone released by the posterior pituitary that stimulates the contraction of uterine(during labor) and mammary gland…
Correct answer: Oxytocin- A. Glucagon
- B. Thyroxine
- C. Epinephrine
- D. Oestrogen
Explanation: Estrogen is a female sex hormone that is steroid in nature.
Correct answer: Oestrogen- A. Secretin
- B. Testosterone
- C. Insulin
- D. Thyroxin
Explanation: Wm. M. Bayliss and Ernest H. Starling discovered secretin, the first hormone, in 1902.
Correct answer: Secretin- A. Ovaries
- B. Testes
- C. Egg
- D. Kidneys
Explanation: The correct answer is ovaries. The ovaries are the female reproductive organs that produce eggs and secrete the hormones estrogen and…
Correct answer: Ovaries- A. Cushing's disease
- B. Addison's disease
- C. Grave's disease
- D. Acromegaly
Explanation: The correct answer is Addison's disease. It is a condition where the adrenal glands are unable to produce sufficient steroid hormones due…
Correct answer: Addison's disease- A. Progesterone
- B. Parathormone
- C. Glucagon
- D. Tetraiodothyronine (T4)
Explanation: The correct answer is glucagon. Glucagon is produced by the pancreas and acts to increase blood glucose levels by promoting the conversion…
Correct answer: Glucagon189. In a human body, the luteinising hormone (LH) acts on I. Ovaries II. Testes III. Mammary glands
- A. I only
- B. III only
- C. I and II
- D. II and III
Explanation: The correct answer is I and II. Luteinizing hormone (LH) plays a critical role in the reproductive systems of both males and females.
Correct answer: I and II- A. A forest fire slowly expand outward, which provide it with even more fuel to burn
- B. During childbirth, oxytoxin creates a stimulus which causes the hypothalmus to release more oxytocin
- C. As more buffalo begin to run in a herd, the overall level of panic increases. This results in even more baffalo running
- D. As blood calcium level increase, parathyroid hormone (PTH) is reduced
Explanation: The release of parathyroid hormone (PTH) in response to decreased blood calcium levels helps increase calcium levels, and the subsequent…
Correct answer: As blood calcium level increase, parathyroid hormone (PTH) is reduced- A. Glucagon
- B. Glucose
- C. Insulin
- D. All of these
Explanation: Glucagon is a hormone that your pancreas makes to help regulate your blood glucose (sugar) levels.
Correct answer: Glucagon- A. Adrenaline
- B. Thyroid stimulating hormone
- C. FSH
- D. Antidiuretic hormone
Explanation: The posterior lobe of the pituitary gland produces two hormones, vasopressin (Antidiuretic hormone) and oxytocin.
Correct answer: Antidiuretic hormone- A. Hypothalamus
- B. Midbrain
- C. Pons
- D. Cerebellum
Explanation: Neurosecretory muscles are present in the hypothalamus of the brain, where they function to produce hormones like ADH, which are then…
Correct answer: Hypothalamus- A. Epinephrine and Nor-epinephrine
- B. GH and ADH
- C. Thyroxin and calcitonin
- D. Glucagon and insulin
Explanation: The main hormones secreted by the endocrine gland in the pancreas are insulin and glucagon, which regulate the level of glucose in the…
Correct answer: Glucagon and insulin- A. Stimulates the pituitary gland to release GH
- B. Stimulates the liver to convert glycogen to glucose
- C. Stimulates the liver to store glucose
- D. Decreases sugar level in blood
Explanation: When the pituitary gland releases human growth hormone (GH), it primarily stimulates the liver to convert glycogen to glucose.
Correct answer: Stimulates the liver to convert glycogen to glucose- A. It promotes glycogenolysis
- B. It inhibits gluconeogenesis
- C. It's under secretion causes glycosuria
- D. It's under secretion causes hypoglycemia
Explanation: Glucagon promotes glycogenolysis in liver cells, its primary target with respect to raising circulating glucose levels.
Correct answer: It promotes glycogenolysis- A. A
- B. B
- C. C
- D. D
Explanation: Row D is mismatched.Vasopressin, also known as antidiuretic hormone (ADH), released from posterior pituitary regulates water balance by…
Correct answer: D- A. A
- B. B
- C. C
- D. D
Explanation: When we drink a sugar drink, pancreas release insulin to facilitate glucose uptake by cells for energy production and storage.
Correct answer: D- A. Adrenaline
- B. Parathormone
- C. Insulin
- D. Aldosterone
Explanation: The steroids that are made almost exclusively in the adrenal glands are cortisol, 11-deoxycortisol, aldosterone, corticosterone, and…
Correct answer: Aldosterone200. Norepinephrine:
- A. Is released by sympathetic fibers
- B. Is released by parasympathetic fibers
- C. Decrease the heart rate
- D. Decrease blood pressure
- E. Released by sympathetic fibers and decreases blood pressure
Explanation: Norepinephrine, also known as noradrenaline, is a neurotransmitter and hormone released by sympathetic fibers of the autonomic nervous…
Correct answer: Is released by sympathetic fibers