Question

medal+fan

Answer 1

The respiratory system is responsible for the exchange of gases that allows the body to perform important functions. How does oxygen diffuse within the lungs?

a.
It diffuses from the capillaries into the veins.
c.
It diffuses from the alveoli into the blood.
b.
It diffuses from the arteries into the capillaries.
d.
It diffuses from the blood into the alveoli.

Answer 2

@anonymous_user

Answer 3

I learned about this but I forgot :/
But I think it is D. It diffuses from the blood into the alveoli.

Answer 4

The nicotine in cigarette smoke causes
a.
blood pressure to decrease.
c.
blood pressure to increase.
b.
heart rate to increase.
d.
both b and c.

Answer 5

D. both b and c.