Neurotransmitters are released from the
A. epineurium.
B. synaptic cleft.
C. presynaptic terminal.
D. postsynaptic membrane.
E. calcium channels.
C
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Which of the following statements regarding action potentials generated in a neuronal membrane is FALSE?
A. Action potentials travel decrementally down the membrane. B. An action potential generates a new action potential in an adjacent area of membrane. C. An action potential generates a local current that depolarizes adjacent membrane to threshold potential. D. Action potentials are usually initiated at the initial segment of a neuron. E. An action potential generated by a threshold stimulus is the same size as one generated by a supra-threshold stimulus.
The chorion is
A. cushions and protects the embryo with fluid. B. the extracellular fluid around the egg. C. becomes the umbilical cord vessels. D. the first site of blood cell formation. E. the fetal half of the placenta.
This part of the brain is responsible for alerting the cerebrum to incoming sensory information.
A. Motor component of the reticular formation B. Prefrontal cortex C. Amygdaloid body D. Sensory component of the reticular formation E. Hypothalamus
Which of these lists contains only trace elements?
A) sulfur, chlorine, oxygen B) selenium, hydrogen, calcium C) boron, oxygen, carbon D) silicon, fluorine, tin E) cobalt, calcium, sodium