Parathyroid glands

Question 1

Small, round masses of tissue embedded into the posterior surface of loves are called the

Answer 1

Parathyroid glands

Question 2

Name the 2 kinds of epithelial cells found on the parathyroid

Answer 2

1. Chief cells(dense, principal)secretes PTH (parathyroid hormone)
2. Oxyphil cells- function not known, in cancer, secretes excess PTH

Question 3

What does PTH regulate?

Answer 3

• calcium, magnesium, and phosphate

Question 4

Specific action of PTH

Answer 4

Increase number and activity of osteoclasts

Question 5

Result of PTH

Answer 5

Elevated bone resorption

Question 6

What does PTH do on kidneys?

Answer 6

1. Slows rate of magnesium and calcium are lost from blood into urine
   2.decreaes blood HPO24
2. Promotes function of calcitriol

Question 7

Calcitriol is the active form of

Answer 7

Vitamin D

Question 8

Drop in calcium levels

Answer 8

1) Parathyroid glands—>PTH
2) Osteoclasts release calcium from bone
3) calcium reassured from urine by kidneys
4) calcium absorption in small intestine via vitamin D synthesis
5) calcium levels increase

Question 9

What does the parathyroid glands work with to regulate calcium homeostasis?

Answer 9

Calcitriol and PTH

Question 10

Increase on calcium levels

Answer 10

1. Thyroid gland releases calcitonin
2. Osteoclast activity is prohibited
3. Ca2+ reabsorption in the kidneys decreases
   4.Ca2+ levels in blood decreases