Specialized cell junctions include all of the following EXCEPT
A) tight junctions. B) phospholipases. C) gap junctions. D) desmosomes.
B
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Glycolysis and the TCA cycle are two of the most important catabolic pathways in chemoorganotrophs.
Answer the following statement true (T) or false (F)
What percentage of the urea filtered by the kidneys is excreted in the urine?
a. 10 percent b. 20 percent c. 50 percent d. 75 percent e. 100 percent
A child may be given the vaccine for chickenpox. If the child goes to school and plays with other children who have the chickenpox virus, the vaccinated child will not get sick. Why is this?
A) Vaccines act like antibiotics so that any organism in the body will be destroyed before the immune system has to respond. B) Vaccines introduce a friendly virus into cells so they cannot be infected with a second virus. C) Vaccines produce a primary response in which memory cells are generated that respond rapidly in a second exposure. D) Vaccines stimulate macrophages to work extra hard to fight infections.
Red blood cells are biconcave. Their shape is determined by interior proteins anchored to the membrane termed
A. phospholipids. B. clathrins. C. actin filaments. D. cytoskeleton. E. spectrins.