Chapter 17: Endocrine System

Question 1

Negative feedback

Answer 1

Most common arrangement where end product hormone levels have a negative effect on continued secretion of hypothalamic and pituitary hormones

Question 2

Positive feedback

Answer 2

Increases upstream hormonal secretions and amplifies the end product hormone level and cellular response

Question 3

2 divisons of the hypothalamus

Answer 3

1. Adenohypophysis - anterior

2. Neurohypophysis - posterior

Question 4

Hypothalamus hormone secretion

Answer 4

1. Peptide

2. Inhibitory hormones: somatostatin

Question 5

T or F: Peptide hormones called releasing hormones that stimulate their respective target cells in the anterior pituitary gland

Answer 5

True

Question 6

Somatotropin

Answer 6

Growth hormone

Question 7

Thyrotropin

Answer 7

Thyroid stimulating hormone (TSH)

Question 8

Corticotrophin

Answer 8

Adrenocorticotropic hormone (ACTH)

Question 9

Gonadotropin

Answer 9

1. Follicle stimulating hormone (FSH)

2. Luteinizing hormone (LH)

Question 10

Posterior pituitary is the source of 2 hormones made in hypothalamic nuclei

Answer 10

Antidiuretic hormone

• Vasopressin
• Oxytocin

Question 11

Goiter formation

Answer 11

Abnormal enlargement of the thyroid

- Inadequate dietary iodine, insufficient thyroxine and excess thyroid (TSH)

Question 12

Parathyroid hormone (parathormone)

Answer 12

Raises blood calcium levels in response to hypocalcemia (low blood Ca++)

Question 13

Adrenal Medulla secretes

Answer 13

epinephrine and nonepinephrine

Question 14

3 zones of the adrenal cortex

Answer 14

1. Glomerulosa
2. Fasiculata
3. Reticularis

Question 15

2 classes of hormones made in the cortex

Answer 15

1. Mineralocorticoids - aldosterone

2. Glucocorticoids - cortisol

Question 16

Pineal gland

Answer 16

or epithalamus

- associated with melatonin

Question 17

T or F: Pancreas has both endocrine and exocrine functions

Answer 17

True

- Endocrine function involves regulation of blood glucose levels

Question 18

2 main cells in the pancreatic islet

Answer 18

1. Alpha cell

2. Beta cell

Question 19

Alpha cell

Answer 19

Makes glucagon

- Raises blood glucose

Question 20

Beta cell

Answer 20

Makes insulin

- only hormone that lowers blood glucose