Question

1. the gland that produces insulin and glucagon is indicated by ______.

a

b

c

d

e

f

g

h

i

j

figure 9.1

a) b
b) f
c) g
d) h
e) d

1. which endocrine gland is situated at the base of the throat, just inferior to the adams apple?

a) thyroid gland
b) pineal gland
c) pituitary gland
d) thymus gland

1. which of these hormones regulate calcium levels in the body?

a) calcitonin and parathyroid hormone (pth)
b) oxytocin and prolactin
c) insulin and glucagon
d) t3 and t4

1. parathyroid hormone (pth) is secreted by the parathyroid glands in response to low blood concentration of calcium ions. this mechanism operates by a ______.

a) humoral stimulus
b) messenger stimulus
c) hormonal stimulus
d) neural stimulus

Explanation:

1. The gland that produces insulin and glucagon is the pancreas, which is labeled as G in the diagram.
2. The thyroid gland is located at the base of the throat, below the Adam's apple.
3. Calcitonin (lowers blood calcium) and parathyroid hormone (raises blood calcium) work together to regulate calcium levels in the body.
4. Humoral stimulus refers to hormone release triggered by changes in blood levels of non-hormonal substances, such as low calcium ions triggering PTH release.

Answer:

1. c) G
2. a) Thyroid gland
3. a) calcitonin and parathyroid hormone (PTH)
4. a) humoral stimulus