Question 14 (5 points) Which of the following is not a component of blood

White blood cells
Red blood cells
Platelets
Pulmonary fluid

d

Explanation:

Blood usually contain, white blood cells, red blood cells, and platelets.

Hope this helps:)

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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