IGCSE Biology: Hormones & homeostasis

Which hormone is known as the fight or flight hormone?

• Adrenaline

• Glucagon

• Insulin

• Glycogen

The hormone auxin has what effect on plant cells in the shoot tips of plants?

• Makes them grow longer

• Prevents them from growing

• Makes them move to the dark side

• Negative phototropism

Tags

NGSS.MS-LS1-5

A hormone is a chemical substance produced by ...

• A gland

• The liver

• A target organ

• The blood

Hormones are eventually removed from the blood and destroyed by which organ?

• Kidneys

• Liver

• Brain

• White blood cells

Which of the following are effects of adrenaline on the body?

• Increasing breathing rate

• Decreasing pulse rate

• Causing radial muscles in the iris to contract

• Causing circular muscles in the iris to contract

• Causes blood glucose levels to increase

What are the effects of insulin and glucagon on the concentration of blood glucose?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-3

When the blood glucose concentration is low, which organ releases which hormone?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-3

In these experiments what responses have the shoots shown?

• Positive phototropism and positive gravitropism

• Negative phototropism and positive gravitropism

• Positive phototropism and negative gravitropism

• Negative phototropism and negative gravitropism

Tags

NGSS.MS-LS2-1

The diagram shows a person sweating in hot weather. What part is played by the sweat glands during the process of sweating?

• Effector

• Receptor

• Sense Organ

• Stimulus

Tags

NGSS.HS-LS1-3

The graph shows the change in blood glucose levels of a pupil at a school on a normal day. What could explain the dip in blood sugar after he left school?

• He ran home

• He got into a fight

• He did not produce enough insulin

• He produced too much glucagon

Tags

NGSS.HS-LS1-3