Hormones：练习题

Which endocrine gland is responsible for secreting the hormone testosterone?

In a 'fight or flight' situation, the hormone adrenaline is secreted. Which of the following describes the physiological effects of adrenaline?

A person's blood glucose concentration is monitored after a meal. As the glucose level rises, the pancreas secretes insulin. Later, if the glucose level drops too low, the pancreas secretes glucagon. What is the role of glucagon in this homeostatic process?

Hormones are chemical substances produced by glands and carried by the blood. What is the name of the specific organs whose activity is altered by a particular hormone?

In addition to increasing the heart rate, adrenaline prepares the body for action by affecting the liver. Which statement describes this effect?

Identify the hormone secreted by the testes and state one example of a secondary sexual characteristic it promotes during puberty in males.

Identify the hormone secreted by the pancreas that responds to low blood glucose levels and name the target organ where this hormone stimulates the breakdown of glycogen into glucose.

State the effect of the hormone adrenaline on the diameter of the pupils in the eye during a 'fight or flight' situation.

(a) State the name of the endocrine gland that secretes insulin and identify the hormone secreted by the adrenal glands.
(b) Define the term hormone and explain how they are transported to their specific target organs in the human body.