Thyroid, parathyroid and blood calcium — practice questions

Question 1 · difficulty L1 · recall

Which element is required for normal synthesis of thyroid hormones?

• A. Iodine
• B. Iron
• C. Calcium
• D. Sodium only

Question 2 · difficulty L1 · recall

Which thyroid hormone helps lower an elevated blood calcium level?

• A. Parathyroid hormone
• B. Thyroxine
• C. Calcitonin
• D. Adrenaline

Question 3 · difficulty L2 · understanding

The hormone that raises blood calcium concentration:

• A. calcitonin
• B. insulin
• C. melatonin
• D. parathyroid hormone

Question 4 · difficulty L2 · understanding

The major thyroid hormones regulating basal metabolism:

• A. T3 and T4
• B. PTH and calcitonin
• C. FSH and LH
• D. insulin and glucagon

Question 5 · difficulty L2 · understanding

What is the main effect of parathyroid hormone on blood calcium concentration?

• A. It lowers blood calcium concentration
• B. It raises blood calcium concentration
• C. It prevents calcium from entering blood under all conditions
• D. It converts calcium into iodine

Question 6 · difficulty L3 · understanding

Which of the following are NOT under the control of thyroid hormone? A. Maintenance of water and electrolyte balance B. Regulation of basal metabolic rate C. Normal rhythm of sleep-wake cycle D. Development of immune system E. Support the process of RBCs formation Choose the correct answer from the options given below:

• A. B and C only
• B. C and D only
• C. D and E only
• D. A and D only

Question 7 · difficulty L3 · application

A child has severely reduced thyroid hormone secretion during development. Which type of process is most directly at risk?

• A. Urine storage in the bladder
• B. Blood clot formation only
• C. Formation of synaptic clefts
• D. Normal physical growth and mental development

Question 8 · difficulty L3 · application

Blood calcium falls below its normal range. Which endocrine response would most directly help restore it?

• A. Increased parathyroid hormone secretion
• B. Increased calcitonin secretion
• C. Complete suppression of parathyroid activity
• D. Increased melatonin secretion

Question 9 · difficulty L3 · understanding

Given below are two statements : Statement I : Parathyroid hormone acts on bones and stimulates the process of bone resorption. Statement II : Parathyroid hormone along with Thyrocalcitonin plays a significant role in carbohydrate metabolism. In the light of the above statements, choose the correct answer from the options given below :

• A. Statement I is correct but Statement II is false
• B. Statement I is incorrect but Statement II is true
• C. Both Statement I and Statement II are true.
• D. Both Statement I and Statement II are false.

Question 10 · difficulty L3 · understanding

Which of the following are not the effects of Parathyroid hormone? (a) Stimulates the process of bone resorption (b) Decreases Ca 2+ level in blood (c) Reabsorption of Ca 2+ by renal tubules (d) Decreases the absorption of Ca 2+ from digested food (e) Increases metabolism of carbohydrates Choose the most appropriate answer from the options given below:

• A. (a) and (c) only
• B. (b), (d) and (e) only
• C. (a) and (e) only
• D. (b) and (c) only