The concentration of oxygen is lower at high altitudes. Why would this make it harder for a person to get enough oxygen into their blood?
A. Hemoglobin cannot bind oxygen well at low concentrations.
B. The concentration gradient from the alveoli to the blood decreases.
C. People are working harder at high altitudes and have higher demands for oxygen.
D. The concentration of oxygen in the blood is too low for diffusion into tissues.
E. The heart cannot obtain enough energy to pump oxygen into the blood from the alveoli.
B. The concentration gradient from the alveoli to the blood decreases.
You might also like to view...
Structures used in recombinant DNA technology to carry the DNA from the cells of one species to the cells of another species are
A) cloning vectors. B) restriction enzymes. C) sticky ends. D) donor DNA.
During prophase, ____ is(are) compacted into visible chromosomes
a. chromatin b. centrioles c. centromeres d. kinetochores e. tetrads
An antagonist to a receptor decreases the number of messengers bound to the receptor.
a. true b. false
Compare the purposes of gene knockouts, knock-ins, and knockdowns
What will be an ideal response?