Whereas a 'plane' describes an imaginary flat surface, a 'section' describes a way to cut an organ
Indicate whether the statement is true or false.
TRUE
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The absolute refractory period of an action potential
A) ensures one-way travel down an axon and allows a neuron to ignore a second signal sent that closely follows the first. B) only allows a neuron to ignore a second signal sent that closely follows the first. C) only ensures one -way travel down an axon. D) only prevents summation of action potentials. E) ensures one-way travel down an axon, allows a neuron to ignore a second signal sent that closely follows the first, and prevents summation of action potentials.
What percentage of the body moves lymph in to the thoracicduct?
a. 100%. b. 75%. c. 50% . d. 25%.
The platelet release reaction is initiated by platelets binding to exposed collagen in a broken membrane.
Answer the following statement true (T) or false (F)
As part of which nervous system do preganglionic neurons release acetylcholine?
a. parasympathetic nervous system b. sympathetic nervous system c. both the parasympathetic and sympathetic nervous systems