Which of the following is NOT an effect of aging on the immune system?
A. Response to vaccines increases
B. Thymus gland degenerates
C. B cells do not clone
D. A reduced amount of T cells that do not respond to foreign antigens
Answer: A
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A Schwann cell is a structure that is attached to a neuron and is crucial to its function. It assists in the neuron's function by speeding up the rate of signal transduction. Schwann cells are neuroglia.
Answer the following statement true (T) or false (F)
Briefly differentiate between atmospheric pressure, intrapulmonary pressure, and intrapleural pressure
Which of these is always negative in a healthy individual during normal breathing? What happens if intrapleural pressure becomes equal to atmospheric pressure? What will be an ideal response
Release of TSH from the anterior pituitary causes ________.
A. thyroid follicle cells produce MIT and DIT B. thyroid follicle cells oxidize iodide ions to iodine C. thyroid follicle cells take up a small amount of colloid, hydrolyze T3 and T4, and release them into the blood D. thyroid follicle cells produce calcitonin
The action of the extensor digitorum longus is to
a. extend the 1st digit b. extend toes 2 - 5 and flex the ankle c. flex the 2nd to 5th toes