The thickest, mechanically strongest part of the meninges is the
a. dura mater.
b. arachnoid.
c. pia mater.
Ans: a. dura mater.
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Which is TRUE about the axon hillock of an axon?
A. Synapses far from the axon hillock are more effective in influencing whether an action potential will be generated in the axon than are synapses close to the axon hillock. B. It can only conduct graded potentials because it lacks voltage-gated Na+ channels. C. It is the region where neurotransmitter vesicles are docked and ready to be released by exocytosis. D. Its membrane potential at threshold is more negative than that of the cell body and dendrites. E. Its membrane potential at threshold is more positive than that of the cell body and dendrites.
An ectopic pacemaker is an area of the myocardial conducting system, other than the atrioventricular node, that initiates cardiac depolarization.
Answer the following statement true (T) or false (F)
The adult heart is roughly the size of
A) the liver. B) a man's clenched fist. C) the gallbladder. D) the hand of a 10-year-old. E) the brain.
During which stage of labor is the fetus delivered?
A) gastrula stage B) dilation stage C) placental stage D) expulsion stage