Staying In Balance

Question 1

What is homeostasis?

Answer 1

Keeping a constant internal environment by balancing bodily inputs and outputs through negative feedback.

Question 2

What does it regulate?

Answer 2

• Temperature
• CO2 levels
• Water levels

Question 3

What is the optimum temperature for most enzymes in the human body?

Answer 3

37*C

Question 4

What is temperature controlled by?

Answer 4

The hypothalamus gland which triggers vasodilation and vasoconstriction.

Question 5

How does the body cool down?

Answer 5

1) Sweating increases to transfer heat to the environment
2) Vasodilation occurs, blood vessels widen so blood flows closer to the surface of the skin
3) This increases heat transfer so evaporation of sweat can occur by using body heat to turn it into water vapour

Question 6

What is vasoconstriction?

Answer 6

Constriction of blood vessels so less blood flows to the surface of the skin so less heat is transferred.

Question 7

What is blood sugar levels controlled by?

Answer 7

Insulin (hormone)

Question 8

Where is insulin produced?

Answer 8

The pancreas

Question 9

What happens when there is too much glucose in the blood?

Answer 9

1) Pancreas produces insulin
2) Insulin allows glucose to be absorbed by body cells
3) Converts glucose into glycogen which is stored in the liver
4) Blood sugar levels decrease

Question 10

How does type 1 diabetes affect the body and how is it managed?

Answer 10

The pancreas doesn’t produce insulin so you must injected doses of insulin after eating.

Question 11

How does type 2 diabetes affect the body and how is it managed?

Answer 11

Insulin has no effect on the body so blood sugars levels must be decreased by having a balanced diet and regularly exercising.