Endocrine system

Homeostasis in the human body is often maintained by a: 

• neutral feedback loop 
• correctional feedback loop

• positive feedback loop
• negative feedback loop

The diagram shows the mechanisms that control the concentration of glucose in the blood.

Which row identifies the glands and hormones labelled W, X, Y and Z?

• adrenal gland, adrenaline, adrenal gland, glucagon

• adrenal gland, adrenaline, pancreas, insulin

• pancreas, glucagon, adrenal gland, insulin

• pancreas, insulin, pancreas, glucagon

What is Homeostasis ?

• is the maintenance of a constant internal environment

• is the maintenance of a constant external environment

• is the maintenance of a constant living environment

Insulin and glucagon are produced by

• the liver

• the pancreas

• the kidneys

Which one here is a hormone?

• Glycogen

• Glycerol

• Glucagon

• Glucose

Which one here reduces the amount of glucose in the blood?

• Glucagon

• Insulin

• Glycogen

• ADH

Which one is NOT the effect of the release of adrenaline on the heart rate, glucose concentration and pupil

• heart rate increased

• glucose concentration increased

• glucose concentration decreased

• pupil dilates

A hormone is

• a chemical substance produced by a gland and carried by the lymph.

• an enzyme produced by a gland and carried by the blood.

• a chemical substance produced by an organ and carried by the blood.

• a chemical substance produced by a gland and carried by the blood.

Endocrine glands secrete _

• Hormones

• Neurotransmitters

• A wide range of chemical substances

What is the main function of the endocrine system?

• It creates chemicals, or hormones, that are sent around the body to maintain homeostasis.

• It creates electrical messages that are sent around the body to maintain homeostasis.

• It maintains the correct level of oxygen in the body to maintain homeostasis.

• It releases waste from the body to maintain homeostasis.