9. Knowing what you know about how a substance travels in diffusion, in order for oxygen to leave the alveoli and enter the

blood, there would be a [ HIGHER or LOWER ] concentration of

oxygen in the alveoli compared to the blood.

10. Knowing what you know about how a substance travels in

diffusion, in order for carbon dioxide to leave the blood and enter the

alveoli, there would be a [ HIGHER or LOWER ] concentration of

carbon dioxide in the alveoli compared to the blood.

11. Explain your reasoning for questions #9 and #10.

The correct answer is :

9. higher

10. lower

Explanation:

The movement of Oxygen from alveoli to the blood capillaries is possible due to simple diffusion through the paper-thin membrane between them due to the concentration gradient. The Concentration of oxygen in the alveoli is higher than the blood capillaries so the movement of oxygen takes place.

The CO2 concentration in the blood is higher than in the alveoli, so it diffuses through the membrane from high concentration to low concentration to the alveoli.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

i'll try what topic lol