Endocrine System MCQs | Endocrine System Objective Type Questions & Answers

(21) Calcitonin is a hormone of which of following
[A] Adrenal cortex
[B] Thyroid gland
[C] Pituitary gland
[D] Thymus gland
Answer: Thyroid gland
(22) The Glucagon is:
[A] speeds up protein synthesis within cells
[B] decreases the conversion of glycogen into glucose
[C] slows down glucose formation from lactic acid
[D] accelerates the conversion of glycogen into glucose
Answer: accelerates the conversion of glycogen into glucose

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(23) Most hormones of the endocrine system are regulated by a:
[A] Negative feedback mechanism
[B] Positive feedback mechanism
[C] Hormone-receptor complex
[D] Hormone-gene complex
Answer: Negative feedback mechanism
(24) The clusters of cells in the pancreas that produce hormones are the:
[A] Nodules
[B] Islets of Langerhans
[C] Pancreatic medulla
[D] Pancreatic cortex
Answer: Islets of Langerhans
(25) Which hormones of the adrenal glands supplement the sex hormones from the gonads?
[A] Mineralocorticoids, such as aldosterone
[B] Glucocorticoids, such as cortisol
[C] Gnadocorticoids, such as the androgens
[D] Epinephrine and norepinephrine
Answer: Gnadocorticoids, such as the androgens
(26) Which of the following hormones are responsible for the "fight-or-flight" response?
[A] Epinephrine and norepinephrine
[B] Insulin and glucagon
[C] Esrtogen and progesterone
[D] Thyroxin and melatonin
Answer: Epinephrine and norepinephrine
(27) The posterior pituitary stores and releases:
[A] Growth hormone and prolactin
[B] Prolactin and oxytocin
[C] Oxytocin and antidiuretic hormone (ADH)
[D] ADH and growth hormone
Answer: Oxytocin and antidiuretic hormone (ADH)
(28) Which of these is not an endocrine property?
[A] hormones reach targets through the blood
[B] effects are slow and cyclic
[C] rapid acting effects
[D] effects caused by chemicals
Answer: rapid acting effects
(29) Which of these is not an endocrine gland?
[A] Pancreas
[B] Testes
[C] Parathyroid
[D] Salivary gland
Answer: Salivary gland
(30) The pituitary hormone that stimulates the male testes to produce sperm and stimulates the development of the follicle in the female on a monthly cycle is
[A] growth hormone
[B] luteinizing hormone
[C] prolactin
[D] follicle-stimulating hormone
Answer: follicle-stimulating hormone
31 How do hormones from the thyroid and parathyroid regulate the calcium concentration of the blood?
[A] Both parathroid hormone and the three thyroid hormones function to regulate blood calcium levels
[B] Thyroxine and triiodothyronine together regulate calcium levels, as needs dictate
[C] Parathyroid hormone lowers blood calcium; calcitonin raises blood calcium
[D] Calcitonin lowers blood calcium; parathyroid hormone raises blood calcium
Answer: Calcitonin lowers blood calcium; parathyroid hormone raises blood calcium
32 Which of these is not a function of the hypothalamus?
[A] Affect heart rate
[B] Control temperature
[C] Affect water balance
[D] Secrete FSH
Answer: Secrete FSH
33 Among the following glands which can be classified as an endocrine and an exocrine gland?
[A] Thyroid
[B] Thymus
[C] Pancreas
[D] Pituitary
Answer: Pancreas
34 Which gland controls basal metabolic rate (BMR)?
[A] Pancreas
[B] Testes
[C] Parathyroid
[D] Thyroid
Answer: Thyroid
35 Which of these hormones is made by the posterior pituitary?
[A] FSH
[B] LH
[C] ACTH
[D] ADH
Answer: Pineal gland
36 Name the gland that is located at the base of the throat, just inferior to the laryngeal prominence (Adam's apple).
[A] Pituitary
[B] Pineal gland
[C] Hypothalamus
[D] Thyroid
Answer: Thyroid.
37 Which gland is located just superior to the kidneys?
[A] Pituitary
[B] Adrenal
[C] Pancreas
[D] ovaries
Answer: Adrenal

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