Free Coordination and Control MCQs with Answers
1,687 Coordination and Control MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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- A. Glucagon
- B. Calcitonin
- C. Nor-epinephrine
- D. Thyroxin
Explanation: Glucagon is released by cells when the blood glucose level is low. The sympathetic nervous system also stimulates Its secretion.
Correct answer: Glucagon- A. Cortisol
- B. Aldosterone
- C. Corticosterone
- D. Androgen
Explanation: Cortisol: A hormone produced by the adrenal glands. It helps regulate metabolism, control blood sugar levels, modulate the immune system's…
Correct answer: Cortisol- A. Sterility
- B. Male like characters in female
- C. Over androgen production
- D. High steroid level in blood
Explanation: Sterility because it is not a direct result of a tumor in the adrenal cortex.
Correct answer: Sterility- A. All parts of body
- B. Skin and gut
- C. Brain and muscles
- D. Skin and muscles
Explanation: Skin and gut. Epinephrine and norepinephrine can have differing effects on the blood vessels supplying these areas.
Correct answer: Skin and gut- A. Cushing's disease
- B. Addison's disease
- C. Diabetes
- D. Cretinism
Explanation: Destruction of the adrenal cortex such as, occurs in Addison's disease, will lead to general metabolic disturbance, in particular weakness…
Correct answer: Addison's disease- A. Protein
- B. Fats
- C. Glycogen
- D. Starch
Explanation: Based on the explanations provided, the correct answer to the question is option C) Glycogen.
Correct answer: Glycogen- A. Thyroid Gland
- B. Adrenal medulla
- C. Pituitary Gland
- D. Thymus gland
Explanation: Epinephrine and norepinephrine are the hormones of adrenal medulla during emergency conditions.
Correct answer: Adrenal medulla- A. Pancreas
- B. Gut
- C. Hypothalamus
- D. Testes
Explanation: Based on the explanations provided, the correct answer to the question is option D) Testes.
Correct answer: Testes- A. Testosterone
- B. FSH
- C. Oxytocin
- D. ICSH
Explanation: Follicle-stimulating hormone (FSH) secreted by the anterior pituitary in response to gonadotropin-releasing hormone (GoRH) released by the…
Correct answer: FSH- A. Before birth
- B. After puberty
- C. After birth
- D. Before puberty
Explanation: ln fetus, the testosterone hormone initiates the development of primary sex organs but at puberty its secretion helps in the development…
Correct answer: Before birth- A. Testosterone
- B. FSH
- C. LTH
- D. STH
Explanation: After the initiation of development, the sex organs in the foetus produce them, and their level rises fairly consistently until puberty.
Correct answer: Testosterone- A. Developing follicle
- B. Maturing follicle
- C. Follicle under FSH
- D. Ruptured follicle
Explanation: Estrogen is produced from developing follicles under the action of FSH. Ruptured follicles are responsible for progesterone production.
Correct answer: Ruptured follicle- A. Before birth
- B. After puberty
- C. After birth
- D. Before puberty
Explanation: After puberty, the supply of LH (ICSH) is constant and therefore the l evel of testosterone remains constant.
Correct answer: After puberty- A. Estrogen
- B. Testosterone
- C. Progesterone
- D. Both A and B
Explanation: Deficiency of estrogen causes sterility in females while deficiency of testosterone causes sterility in males.
Correct answer: Both A and B- A. ADH
- B. Insulin
- C. Oxytocin
- D. Aldosterone
Explanation: Positive feedback system the output enhances the original stimulus. A good exapmle of a positive feedback system is child birth.During…
Correct answer: Oxytocin- A. Target site
- B. Feedback mechanism
- C. Effector's response
- D. Precursor activation
Explanation: Most hormones are regulated by feedback mechanisms. A feedback mechanism is a loop in which a product feeds back to control its own…
Correct answer: Feedback mechanism- A. Labour contractions
- B. Insulin production
- C. Body temperature
- D. Thyroxin release
Explanation: Strech-receptive neurons in the cervix respond to this extension by signaling the hypothalamus, which response by triggering the release…
Correct answer: Labour contractions- A. TSH
- B. Oxytocin
- C. ACTH
- D. Both A and C
Explanation: Negative feedback mechanism is crucial for maintenance of hemeotasis. Many hormones such as TSH, ACTH etc.
Correct answer: Both A and C- A. Deficiency of thyroxin
- B. Deficiency of STH
- C. Excess of thyroxin
- D. Deficiency of insulin
Explanation: Dwarfism, also known as short stature, can result from a deficiency of growth hormone (STH).
Correct answer: Deficiency of STH- A. Stimulate pituitary gland
- B. Stimulate adrenal medulla
- C. Stimulate adrenal cortex
- D. Stimulate thyroid gland
Explanation: Adrenocorticotropic hormone ACTH is released by the pitutary gland and it stimulates the adrenal cortex to release cortisol, which is a…
Correct answer: Stimulate adrenal cortex