Neurons have a _______ membrane potential of -70mV. In other words, this is their stable membrane potential under normal conditions
Fill in the blank with correct word.
resting
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__________ fluid prevents friction between the heart and the pericardium when the heart beats
Fill in the blank(s) with correct word
Reflex arcs
A. are capable of receiving a stimulus and yielding a response. B. are the basic structural units of the nervous system. C. occur primarily in the cerebral cortex of the brain. D. involve inhibitory neurons. E. do not involve the spinal cord.
Glycogen is a complex carbohydrate that is obtained by eating plants.
Answer the following statement true (T) or false (F)
Helper T cells ________
A) function in the adaptive immune system activation B) often function to decrease the immune response C) bind tightly to target cells and release a lymphotoxin called perforin D) release B7 proteins