Q: Which equation best represents the negative feedback mechanism for insulin release in response to blood glucose levels?

$$\Delta [\text{Insulin}] = -k \cdot \Delta [\text{Glucose}]$$

Question 1

Which of the following best describes the role of the hypothalamus in endocrine control?

Accepted Answer

It acts as the coordinating center for behavioral, autonomic, and endocrine functions, primarily maintaining body temperature.

Question 2

A patient presents with abnormally high blood calcium levels. Which hormone is most likely underactive?

Accepted Answer

Calcitonin

Question 3

Which feedback mechanism is illustrated when oxytocin release during childbirth leads to stronger uterine contractions and further oxytocin release?

Accepted Answer

Positive feedback

Question 4

Which hormone is released from the posterior pituitary and is responsible for water balance in the body?

Accepted Answer

Antidiuretic hormone (ADH)

Question 5

Which of the following is an example of a hormone acting via a second messenger system?

Accepted Answer

Epinephrine (adrenaline)

Question 6

A hormone that is made from cholesterol and travels in the blood attached to a carrier protein is classified as:

Accepted Answer

A steroid hormone

Question 7

Which of the following best describes paracrine hormone action?

Accepted Answer

Hormones act on nearby cells, not the one that produced them.

Question 8

Which hormone is released in response to low blood glucose and acts to increase blood glucose levels?

Accepted Answer

Glucagon

Question 9

Which of the following is a characteristic of hormones?

Accepted Answer

A single function can be regulated by several hormones.

Question 10

A patient with a tumor in the anterior pituitary is found to have excess growth hormone (GH). Which of the following symptoms would most likely be observed?

Accepted Answer

Excessive linear bone growth and increased metabolism

Question 11

Which of the following hormones is NOT stored in vesicles but is released immediately after synthesis?

Accepted Answer

Steroid hormones

Question 12

Which diagnostic test would be most appropriate to assess the function of an endocrine gland suspected of hormone deficiency?

Accepted Answer

Stimulation test

Question 13

Which hormone is responsible for stimulating the thyroid gland to release thyroid hormones?

Accepted Answer

Thyroid-stimulating hormone (TSH)

Question 14

Which of the following is an example of autocrine hormone action?

Accepted Answer

Insulin released from pancreatic cells inhibits its own release.

Question 15

Which equation best represents the negative feedback mechanism for insulin release in response to blood glucose levels?

Accepted Answer

$$\Delta [	ext{Insulin}] = -k \cdot \Delta [	ext{Glucose}]$$

Question 16

Which hormone is most likely to be found unbound (free) in the bloodstream?

Accepted Answer

Peptide hormone

Question 17

A patient with a deficiency in adrenocorticotropic hormone (ACTH) would most likely have problems with which physiological process?

Accepted Answer

Release of cortisol from the adrenal gland

Question 18

Which of the following hormones is derived from a single amino acid?

Accepted Answer

Thyroxine ($$T_4)$$

Question 19

Which equation best describes the relationship between hormone concentration and receptor activation for a surface receptor hormone using a second messenger?

Accepted Answer

$$[HR] = k \cdot [H] \cdot [R]$$

Question 20

Which of the following is a function of follicle-stimulating hormone (FSH)?

Accepted Answer

Controls ovulation and sperm production

patho 40

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