White blood cells and also called leukocytes, are a key part of the body's immune system, which is the body’s defense system against infection.
Answer:
Exposure to the disease
Explanation:
Before vaccines, the only way to develop immunity to a disease was to be exposed to the disease-causing pathogen without being harmed by it. A good example of this is smallpox, which was also the first vaccine developed. It was noticed that milk maids weren't catching and dying from small pox like everyone else, because they had been exposed to cowpox. This premise was used to create the first vaccine.
Vaccines give you immunity by injecting you with a small amount of a (usually inactive) pathogen. inside your body. This means your immune system produces antibodies against it. Similar to what happened with the milkmaids.
The resting membrane potential is primarily due to the differences in concentrations of potassium ions.
The high concentration of potassium ions in the intracellular fluid and the high permeability of the cell membrane to potassium ions in comparison to other ions are the main causes of the resting potential.
The potential across a certain cell membrane at rest is known as the resting membrane potential. It is largely determined by the potassium concentration gradient across the cell membrane or the ratio of ICF to ECF potassium in neuromuscular tissues (such as neurons, heart muscle, and skeletal muscle).
The passage of potassium, sodium, calcium, and chloride across the membrane causes variations in its permeability, which in turn affects the resting membrane potential (RMP). The differential in potentials between intracellular and extracellular areas, is acquired by the membrane once it has become polarised.
To learn more about resting membrane potential, refer from
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Answer:
i think its the first one sorry if its wrong
Explanation:
