How does sickle cell anemia reduce the blood’s ability to deliver oxygen to tissues?
a. The plasma membrane is too thick to allow oxygen to diffuse into sickle-shaped red blood cells.
b. Sickle-shaped red blood cells puncture normal red blood cells, causing them to rupture and lose hemoglobin.
c. Deformed red blood cells clog capillaries, preventing other red blood cells from passing through.
d. Sickle cells contain a mutated form of hemoglobin that binds to half as many oxygen molecules.
c. Deformed red blood cells clog capillaries, preventing other red blood cells from passing through.
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Fill in the blank(s) with the appropriate word(s)
In nonviral systems, what is the nature of the hereditary substance?
What will be an ideal response?
Parietal cells secrete:a
chyme. b. pepsin. c. pepsinogen d. HCl and instrinsic factor. e. mucus.
Organisms belonging to the kingdom Plantae
A) are photosynthetic. B) obtain food by decomposing the remains of dead organisms and absorbing the nutrients. C) are unicellular.