Question

How is an increased P50 of hemoglobin beneficial?
Select one:
a. better blood buffering capacity
b. better oxygen unloading at the tissues
c. better iron content of hemoglobin
d. better oxygen loading at the lungs

Which of the following organisms has a single circulatory circuit? (i.e., oxygenated blood mixes with deoxygenated blood before returning to the heart)

Select one:

a. Frog

b. Shark

c. Chicken

d. Lungfish