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.
Last updated
257 questions · page 9 of 13
- A. Pituitary
- B. Adrenal gland
- C. Thyroid
- D. Parathyroid
- E. Pancreas
Explanation: The adrenal glands are often referred to as the "glands of emergency" because they play a crucial role in the body's stress response.
Correct answer: Adrenal gland- A. Trypsin
- B. Pepsin
- C. Chymotrypsin
- D. Amylase
- E. Lipase
Explanation: Secretin is a hormone that primarily stimulates the pancreas to release digestive enzymes such as trypsin, chymotrypsin, amylase, and…
Correct answer: Pepsin- A. To increase the rate of breathing
- B. To increase the heart rate
- C. To increase the level of calcium in blood
- D. Both A and B
Explanation: Adrenaline is released in a fight or flight situation. In flight or fight conditions, both the breathing rate and the heart rate increase…
Correct answer: Both A and B- A. Cushing's syndrome
- B. Addison's disease
- C. Diabetes Mellitus
- D. Goiter
- E. Epilepsy
Explanation: Addison's disease is the result of insufficient production of hormones from the adrenal glands, particularly cortisol and aldosterone.
Correct answer: Addison's disease- A. Pituitary gland
- B. Pancreas
- C. Thyroid gland
- D. Thymus gland
- E. Adrenal gland
Explanation: In humans, prolactin is produced both in the front portion of the pituitary gland (anterior pituitary gland) and in a range of sites…
Correct answer: Pituitary gland- A. LH hormone
- B. Inhibition hormone
- C. FSH hormone
- D. Testosterone hormone
Explanation: Follicle-stimulating hormone (FSH), the hormone responsible for starting follicle (egg) development, causes the level of estrogen, the…
Correct answer: FSH hormone- A. Effector
- B. Receptor
- C. Adopter
- D. Stimuli
Explanation: Sensory neurons, also known as afferent neurons, are neurons in the nervous system that convert a specific type of stimulus, via their…
Correct answer: Receptor- A. Iodopsin glands
- B. Thyroid gland
- C. Rhodopsin glands
- D. Pituitary glands
Explanation: Pituitary gland (also known as hypophysis) is a small, pea-sized gland located at the base of our brain below your hypothalamus.
Correct answer: Pituitary glands- A. fetal adrenal gland
- B. fetal thalamus
- C. fetal hypothalamus
- D. fetal bartholins gland
Explanation: The major corticosteroids aldosterone and cortisol are secreted from the adrenal cortex under the regulation of the renin-angiotensin…
Correct answer: fetal adrenal gland- A. Hypothalamus
- B. Pituitary gland
- C. Thyroid
- D. Thalamus
Explanation: The endocrine system is responsible for producing GnRH. Nerve cells (neurons) in your brain's hypothalamus gland make and release GnRH…
Correct answer: Hypothalamus- A. Posterior lobe of pituitary gland
- B. Anterior lobe of pituitary gland
- C. Anterior lobe of thyroid
- D. Exterior lobe of pituitary gland
Explanation: The hypothalamus and the pituitary gland, which are located in the brain, help control the thyroid gland.
Correct answer: Anterior lobe of pituitary gland- A. Posterior lobe
- B. Both the lobes
- C. None of these
- D. Anterior lobe
Explanation: Thyroid-stimulating hormone is produced and released by the anterior lobe of the pituitary gland.
Correct answer: Anterior lobe- A. Grave's disease
- B. Hyperthyroidism
- C. Hypothyroidism
- D. Goitre
Explanation: Undersecretion of thyroxine leads to hypothyroidism, which causes a variety of symptoms such as fatigue, weight gain, and cold…
Correct answer: Hypothyroidism- A. Increase in Ca levels
- B. Increase in B-12 levels
- C. Decreased Ca levels
- D. Decreased B-12 levels
Explanation: Parathyroid hormone is responsible for maintaining Ca levels in the body.
Correct answer: Decreased Ca levels- A. Uterine contraction
- B. Growth of the body
- C. Blood pressure
- D. Production of thyroid hormone
Explanation: STH (Somatotrophic Hormone) also known as the growth hormone is secreted by the anterior pituitary gland has a direct effect on the growth…
Correct answer: Growth of the body- A. Calcium
- B. Carbondioxide
- C. Oxygen
- D. Vitamin D
Explanation: Parathormone acts on kidneys and releases the active form of vitamin D. When it acts on bones, it release calcium.
Correct answer: Vitamin D- A. Glucagon
- B. Estrogen
- C. Insulin
- D. Progesterone
Explanation: Glucagon is a hormone produced by the pancreas that increases blood glucose levels by promoting the breakdown of Glycogen (stored glucose)…
Correct answer: Glucagon- A. Carbohydrates
- B. Proteins
- C. Lipids
- D. Nucleic Acids
Explanation: Insulin and glucagon are both peptide (protein) hormones secreted by the beta and alpha cells of pancreas respectively.
Correct answer: Proteins- A. Release factor
- B. Inhibitor
- C. Accelerator
- D. Tropic or trophic hormones
Explanation: Hormones secreted by the anterior pituitary that control the secretion of hormones from other endocrine glands are known as tropic or…
Correct answer: Tropic or trophic hormones- A. Glucocorticoid
- B. Insulin
- C. Glucagon
- D. Aldosterone
Explanation: The correct answer is Glucagon. It is a peptide hormone secreted by the alpha cells of the Islets of Langerhans in the pancreas.
Correct answer: Glucagon