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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1,687 questions · page 58 of 85
- A. OPTION A
- B. OPTION B
- C. OPTION C
- D. OPTION D
Explanation: The correct answers for the three blanks A, B and C are ovary, glucagon and growth hormone respectively.
Correct answer: OPTION A- A. Aldosterone
- B. Both androstenedione and dehydroepiandrosterone
- C. Adrenaline
- D. Cortisol
Explanation: Adrenal glands or (suprarenal glands) are two triangular endocrine glands, each of which covers the superior surface of a kidney.
Correct answer: Adrenaline- A. Glucagon - Beta Cells (Source)
- B. Somatostatin - Delta Cells (Source)
- C. Corpus Luteum - Relaxin (Secretion)
- D. Insulin - Diabetes Mellitus (Disease)
Explanation: Glucagon is secreted by alpha-cells in the Isles of Langerhans, while beta-cells produce insulin.
Correct answer: Glucagon - Beta Cells (Source)1144. Toxic agents present in food which interfere with thyroxine synthesis lead to the development of :
- A. Toxic goiter
- B. Cretinism
- C. Simple goiter
- D. Thyrotoxicosis
Explanation: Iodine is required for production of thyroxine, thus lack of iodine results in hyposecretion of thyroxine.
Correct answer: Simple goiter- A. OPTION A
- B. OPTION B
- C. OPTION C
- D. OPTION D
Explanation: Vasopressin reduces water loss through urine by stimulating resorption of water by the distal tubules of the kidney.
Correct answer: OPTION B- A. Simple goiter
- B. Myxodema
- C. Cretinism
- D. Hypothyroidism
Explanation: Myxoedema is caused by deficiency of thyroid hormone or thyroxine in adults.
Correct answer: Myxodema- A. Thymus and testes
- B. Adrenal and pancreas
- C. Parathyroid and adrenal
- D. Pancreas and parathyroid
Explanation: Parathyroid and adrenal glands are the endocrine glands because they manufacture hormones and secrete them directly into the blood stream…
Correct answer: Parathyroid and adrenal- A. Parotid
- B. Pancreas
- C. Thyroid
- D. Parathyroid
Explanation: Parathormone is secreted by chief cells of the parathyroid that regulates the metabolism of calcium and phosphate.
Correct answer: Parathyroid- A. Glucagon
- B. ACTH
- C. Insulin
- D. Adrenaline
Explanation: Adrenaline is the hormone secreted by adrenal medulla. It prepares the animal to face special conditions created by physical stress.
Correct answer: Adrenaline- A. Anterior pituitary lobe
- B. Posterior pituitary lobe
- C. Intermediate lobe of the pituitary
- D. Hypothalamus
Explanation: The posterior pituitary lobe produces no hormones of its own. The hormones that it secretes are actually produced by the hypothalamus.
Correct answer: Posterior pituitary lobe- A. cAMP
- B. cGMP
- C. Calcium
- D. Sodium
Explanation: Secondary messengers are low weight diffusible molecules that are used to relay signals within a cell.
Correct answer: Sodium- A. Epinephrine
- B. Progesterone
- C. Prostaglandin
- D. Estrogen
Explanation: Epinephrine is synthesized from tyrosine which is a non-essential amino acid possessing a cyclic structure with a straight side chain…
Correct answer: Epinephrine- A. Luteinizing hormone - failure in ovulation
- B. Insulin - Diabetes insipidus
- C. Thyroxine - Tetany
- D. Parathyroid hormone - Diabetes mellitus
Explanation: Ovulation occurs under the influence of the luteinizing hormone and FSH (follicle-stimulating hormone) of the anterior pituitary gland.
Correct answer: Luteinizing hormone - failure in ovulation1154. Acromegaly is caused by:
- A. Excess STH
- B. Excess thyroxine
- C. Thyroxine deficiency
- D. Excess adrenaline
Explanation: Acromegaly is caused by an excess of STH (somatotrophic hormone), which is released by the anterior lobe of the pituitary after…
Correct answer: Excess STH- A. S.A node
- B. B cells of Langerhans
- C. Dorsal root of the spinal nerve
- D. Epithelial cells of the stomach
Explanation: Adrenaline directly affects the SA node.The SA node, also known as the sinoatrial node, is the natural pacemaker of the heart.
Correct answer: S.A node- A. Oxytocin
- B. Prolactin
- C. Oestrogen
- D. Gonadotropin releasing factor
Explanation: The ovary secretes two hormones: Oestrogen before ovulation and progesterone after ovulation.
Correct answer: Oestrogen- A. FSH
- B. LH
- C. FSH, LH, estrogen
- D. Progesterone
Explanation: The menstrual cycle is controlled by several endocrinal parameters. In the beginning of the cycle, FSH (follicle-stimulating hormone) of…
Correct answer: FSH, LH, estrogen1158. Which set is similar?
- A. Corpus luteum - Graafian follicles
- B. Sebum - Sweat
- C. Bundle of His - Pace maker
- D. Vitamin B7 - Niacin
Explanation: After ovulation many of the follicular cells remain in the collapsed Graafian follicle on the surface of the ovary.
Correct answer: Corpus luteum - Graafian follicles- A. Pineal body
- B. Skin
- C. Pituitary gland
- D. Thyroid gland
Explanation: Melatonin is a hormone secreted by the pineal gland and retinas of vertebrates.
Correct answer: Pineal body- A. Bartholins gland
- B. Prostate gland
- C. Anal gland
- D. Liver
Explanation: The anal glands are small paired sacs located on either side of the anus between the external and internal sphincter muscles.
Correct answer: Anal gland