Q: Which hormone is released by the pancreas to decrease blood glucose levels, and what is the equation for glucose uptake rate if insulin concentration is doubled?

Insulin; $$\text{Rate} = 2k \times [\text{Insulin}]$$

Question 1

Which hormone is responsible for moving calcium from the blood into the bone, and what is the physiological consequence of its action?

Accepted Answer

Calcitonin; decreases blood calcium levels

Question 2

A patient is given a steroid hormone as treatment. Which of the following best describes the mechanism of action and expected time course for maximal effect?

Accepted Answer

Steroid hormone binds to intracellular receptors, enters the nucleus, and promotes transcription, requiring days for maximal effect

Question 3

Which of the following hormones is NOT produced by the anterior pituitary gland?

Accepted Answer

Antidiuretic hormone (ADH)

Question 4

A person with a tumor in the parathyroid gland is likely to experience which of the following changes in calcium homeostasis?

Accepted Answer

Increased movement of calcium from bone to blood

Question 5

Which of the following best describes the second messenger pathway used by non-steroid hormones?

Accepted Answer

Non-steroid hormones bind to cell surface receptors, activating intracellular cascades such as the cyclic AMP pathway

Question 6

Which hormone is released by the pancreas to decrease blood glucose levels, and what is the equation for glucose uptake rate if insulin concentration is doubled?

Accepted Answer

Insulin; $$	ext{Rate} = 2k 	imes [	ext{Insulin}]$$

Question 7

Which gland is considered the 'master gland' of the endocrine system, and why?

Accepted Answer

Pituitary gland; it secretes hormones that control other glands

Question 8

Which hormone is released by the adrenal cortex and is primarily responsible for regulating sodium and potassium balance?

Accepted Answer

Aldosterone

Question 9

A patient with hyperthyroidism will likely have elevated levels of which hormones, and what is the expected effect on metabolic rate?

Accepted Answer

T3 and T4; increased metabolic rate

Question 10

Which hormone is released by the thymus and plays a role in the development and maintenance of the immune system?

Accepted Answer

Thymosin

Question 11

Which hormone is secreted by the placenta and is used as a marker for pregnancy in clinical tests?

Accepted Answer

Human chorionic gonadotropin (hCG)

Question 12

Which hormone is released by the kidneys in response to low oxygen levels and stimulates red blood cell production?

Accepted Answer

Erythropoietin (EPO)

Question 13

Which of the following is a tropic hormone released by the anterior pituitary, and what is its primary target?

Accepted Answer

Thyroid-stimulating hormone (TSH); targets the thyroid gland

Question 14

Which hormone is released by alpha cells of the pancreas and what is its effect on blood glucose levels?

Accepted Answer

Glucagon; increases blood glucose

Question 15

Which hormone is released by the adrenal medulla during a 'fight or flight' response, and what is its effect on heart rate?

Accepted Answer

Epinephrine; increases heart rate

Question 16

Which hormone is released by beta cells of the pancreas and what is the effect on glucose uptake in muscle cells?

Accepted Answer

Insulin; increases glucose uptake

Question 17

Which hormone is released by the gonadotrophs of the anterior pituitary and is essential for ovulation?

Accepted Answer

Luteinizing hormone (LH)

Question 18

Which hormone is released by the pineal gland and is involved in regulating circadian rhythms?

Accepted Answer

Melatonin

Question 19

Which hormone is released by the posterior pituitary and is involved in water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 20

Which hormone is released by the ovaries and is essential for the maintenance of pregnancy?

Accepted Answer

Progesterone

The Endocrine System: Structure, Function, and Hormonal Regulation

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