Author Question: Changes in the immune system that accompany aging include all of the following except A) T cells ... (Read 55 times)

tatyanajohnson · **on:** Feb 28, 2019

Changes in the immune system that accompany aging include all of the following except
A) T cells becoming less responsive to antigens.
B) fewer cytotoxic T cells responding to infections.
C) decreased numbers of T helper cells.
D) more efficient secondary responses.
E) B cells are less responsive.

Question 2

Each of the following effects is associated with the action of postganglionic sympathetic fibers except
A) increased sweat secretion.
B) reduced circulation to the skin.
C) decreased heart rate.
D) dilation of the pupils.
E) increased blood flow to skeletal muscles.