endocrine system?

Question

a very high level of calcium in the blood suggests a malfunction of
1-liver
2-pancreas
3-parathyroid
4-large intestine

in himans, which substance is directly responsible for constroling the calcium levels of the blood

1-adrenaline
2-paratharmone
3-insulin
4-thyroxine

which structures secrete hrmones the influence proper bone structure and development

1-pituitary and parathyroid
2- thyroid and adrenal cortex
3-ovaries and testes
4-hypothalamus and islets of langerhans

answer correctly and get 100 points

Answer 1

I don't think I will get 100 points, but here you go anyway:

1st question:
3. parathyroid

2nd question
2. parathormone

3rd question
1. pituitary gland (the anterior lobe, which secretes GH - growth hormone) and parathyroid gland (because of the calcium)


There is an interesting mechanism of negative feed-back that regulaties the levels of calcium in the body. The parathyroid glands secrete parathyroid hormone, or paratharmone, which regulates the blood calcium amount. If calcium decreases, the parathyroid glands sense the decrease and secrete more parathyroid hormone. The parathyroid hormone stimulates calcium release from the bones and increases the calcium uptake into the bloodstream from the collecting tubules in the kidneys. Conversely, if blood calcium increases too much, the parathyroid glands reduce parathyroid hormone production. Both responses are examples of negative feedback because in both cases the effects are negative (opposite) to the stimulus.

Answer 2

1) parathyroid
2) thyroxine
3) pituitary and parathyroid

Answer 3

parathyroid
parathormone
pituitary and parathyroid