Endocrine System

Question 1

Which of the following is the result of deficient production of thyrotropin-releasing hormone?

Answer 1

The thyroid gland will produce an insufficient amount of thyroid hormones.

Question 2

Overproduction of thyroid hormone due to a malfunction of the negative feedback loop would result in which of the following conditions?

Answer 2

Hyperthyroidism.

Question 3

Which of the following statements is not true regarding hormones and their target sites?

Answer 3

The Luteinizing hormone is produced by the posterior pituitary gland to stimulate ovulation and production of testosterone.

Question 4

Which of the following hormones is responsible for increasing calcium levels in the blood by stimulating bone resorption?

Answer 4

Parathyroid hormone.

Question 5

Which of the following is true about hormones?

Answer 5

Lack or insufficiency of insulin produced by the pancreas can lead to diabetes.

Question 6

The adrenal glands, which are primarily responsible for producing the hormones cortisol and aldosterone, are located where?

Answer 6

On top of each kidney.

Question 7

Melatonin is the hormone that regulates sleep-and-wake rhythm. Which of the following endocrine glands is responsible for producing melatonin?

Answer 7

Pineal.

Question 8

Which of the following endocrine glands has an exocrine function that aids in regulating levels of glucose in the blood?

Answer 8

Pancreas.

Question 9

Which of the following endocrine glands is not correctly paired with the hormone it produces?

Answer 9

Ovary/follicle-stimulating hormone.

Question 10

Which of the following is true of insulin and glucagon?

Answer 10

The pancreas secretes insulin and glucagon.
Insulin and glucagon regulate the level of glucose in the blood.
Insulin and glucagon have opposite effects on blood glucose but work together to maintain homeostasis.

Question 11

The response elicited by signals coming from endocrine glands is characterized by which of the following?

Answer 11

Slow initiation, prolonged duration of response.

Question 12

Which of the following are chemical signals that are secreted by endocrine glands and travel via circulation to their target organs?

Answer 12

Hormones.

Question 13

Type 1 diabetes is an endocrine disorder characterized by the absence of which of the following hormones?

Answer 13

Insulin.

Question 14

Which of the following involves positive feedback?

Answer 14

Stimulation of stretching of the cervix and uterine contractions by oxytocin.

Question 15

Which of the following hormones is not correctly paired with its function?

Answer 15

Follicle-stimulating hormone/stimulates ovulation and production of testosterone.

Question 16

Which of the following endocrine glands produces insulin?

Answer 16

Pancreas.

Question 17

Which of the following functions as an integration center between the endocrine and nervous systems?

Answer 17

Hypothalamus.

Question 18

Which of the following is the result of deficient production of thyrotropin-releasing hormone?

Answer 18

The thyroid gland will produce an insufficient amount of thyroid hormones.

Question 19

Which of the following hormones stimulates cervical stretching and uterine contraction during childbirth?

Answer 19

Oxytocin.

Question 20

________ is the mechanism of glandular secretion in which stimulation results in continuous production of a hormone above the normal level.

Answer 20

Positive feedback.

Question 21

Which of the following occurs when a person is in a stressful condition?

Answer 21

Mobilization of glucose from the liver into the bloodstream.

Question 22

Which of the following is an example of the positive feedback mechanism?

Answer 22

During childbirth, oxytocin causes uterine contraction which stimulates the posterior pituitary gland to produce more oxytocin.

Question 23

Which of the following illustrates a negative feedback mechanism?

Answer 23

Release of glucagon in response to a decrease in blood glucose.