When erythrocytes are old or die, how are they removed from the blood stream?
1.The liver filters them out.
2.They break into small particles and are cleared out by the kidneys.
3.They dissolve into liquid and circulate in that form in the blood.
4.They are attacked by macrophages and removed.
5.They remain intact, dead cells and are filtered out by the kidneys.
4
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Organisms capable of producing their own food are known as
(a) autotrophs. (b) heterotrophs. (c) omnivores. (d) Herbivores.
Match the axoneme structure with its characteristic.
A) incomplete microtubule B) project inward at each doublet C) slide microtubules past one another D) links adjacent doublets E) complete microtubule 1) A tubule 2) B tubule 3) sidearms 4) radial spokes 5) nexin
If a mutated DNA sequence produces a protein that differs in one central amino acid from the normal protein, which of the following kinds of mutations could have occurred? View Available Hint(s) If a mutated DNA sequence produces a protein that differs in one central amino acid from the normal protein, which of the following kinds of mutations could have occurred?
a. A deletion mutation. b. An addition mutation c. None. d. An addition mutation and a deletion mutation.
In order to provide more strength and resilience, the human vertebral column normally has how many curvatures?
A. one B. two C. three D. four