The most common danger related to the destruction of CD4 T cells is- A. An increase in the risk of high blood pressure B. An increase in the threat of diseases caused by microorganisms and viruses C. A decrease in the flow of blood to vital organs D. A decrease in the amount of oxygen being transported to tissues

Option B.

B.An increase in the threat of diseases caused by microorganisms and viruses

Explanation:

CD4 T cells are a special type of white blood cells that plays an important role in immune system or help to fight against Infections or foreign Invaders in the body. When the CD4 T cells is damaged or destroyed it will not be able to fight against diseases because it has lost the ability to defend against Infections, there will be increase in the thread of diseases caused by microorganisms and virus.

Option B

Explanation:

The function of the CD4 T cells is that they play an important role in the immune system, particularly in the adaptive immune system. They function by stimulating other important immune cells for example macrophages etc to fight infections caused by microorganisms including bacteria and viruses.

Thus, the destruction of these particular white blood cells will lead the cell's inability to activate and recruit other important immune cells to fight against this infections.

they are known to reach a speed of 21 miles per hour

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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