A given allergen can activate a B cell or T cell
Indicate whether the statement is true or false
T
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Marjorie takes an anti-anxiety drug so that she can sleep better and remain calm enough to study effectively. She begins by taking 25 milligrams every evening, but within a month this dose is no longer helping, so she takes two pills. After another month this dosage is no longer effective. This is happening because
A. she has developed tolerance, which means that her liver can no longer metabolize the drug, so it remains active for too long. B. her immune system is rejecting the drug. C. the number of receptors to which the drug binds on neurons has increased. D. the number of receptors to which the drug binds on neurons has declined.
The prefix an- means _____. Select one:
a. without b. with c. against d. missing
A cancer patient is told by their physician that their colon is lacking smooth muscle tone. What does this mean?
A. The intracellular cytoskeleton is overactive. B. The colon is unable to maintain constant tension for sustained periods of time. C. The colon has too many shallow invaginations of plasma membranes. D. The colon is developing action potentials too rapidly.
Predict the effects on membrane potential if the membrane's permeability to calcium increases.
What will be an ideal response?