Question

question 19 (1 point)
what is an environmental change that triggers a change in external or internal
factors called?
an integrator
a sensor
an effector
a stimulus
question 20 (1 point)
which of the following hormones increases long bone growth in childhood?
growth hormone
calcitonin
insulin
cortisol
question 21 (1 point)
the main target organ of glucagon is:
pancreatas
blood vessels
skin
liver

Explanation:

• Question 19: A stimulus is an environmental change that triggers a response. An integrator processes information, a sensor detects changes, and an effector causes a response.
• Question 20: Growth hormone promotes long - bone growth in childhood. Calcitonin regulates calcium, insulin regulates blood sugar, and cortisol is a stress hormone.
• Question 21: Glucagon acts on the liver to increase blood glucose levels. The pancreas produces glucagon, blood vessels and skin are not its main target organs.

Answer:

• Question 19: a stimulus
• Question 20: growth hormone
• Question 21: liver