Soc 16

Question 1

Vasodilation

Answer 1

When veins swell up or dilate; widening of the internal diameter (lumen) of the blood vessel to allow increased blood flow.

Question 2

Vasocontriction

Answer 2

When veins shrink down; narrowing the internal diameter (lumen) of the blood vessel to decrease blood flow.

Question 3

Cardio- Respiratory

Answer 3

The interaction of the heartandlungs to supply oxygen to the muscles during exercise.

Question 4

What happens when your body has to work harder?

Answer 4

Muscles require oxygen and nutrients, such as glycoge, carried by the blood.