The stroke volume is the total volume of blood ejected by both ventricles per minute
Indicate whether the statement is true or false
F
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If an excitatory synapse is activated at the same time as an inhibitory synapse, the effect on postsynaptic membrane potential will be
a. no change. b. a net depolarization since excitation normally triumphs over inhibition. c. a net hyperpolarization since inhibition normally overwhelms excitation. d. impossible to predict since we don't know the relative strength of these synapses.
Sensory neurons that are part of the stretch reflex synapse directly onto the motor neurons of antagonist muscles, and inhibit them
Indicate whether the statement is true or false.
A single contraction-relaxation cycle in a muscle fiber produces a(n)
A) cramp. B) twitch. C) tetanic contraction. D) action potential. E) motor unit.
Bronchoconstriction results from relaxation of smooth muscle in the walls of airways.
Answer the following statement true (T) or false (F)