In nerve cells the sodium-potassium pump is used to generate gradients of both sodium and potassium ions to propagate electrical signals that travel along nerves. This is a(n)

Answer:

The poles

Explanation:

Because the air is thinner and more sun radiation.

The correct answer is (d) Pollutant advisory warnings should be ignored.

If someone is concerned about the effects of the pollutants on exercise, then they should definitely not ignore the pollutant advisory warning. Most of the people exercise in the open environment and breathe very deeply through the mouth, the air we breathe in generally bypass the nasal passage and affects the health. It can led to serious respiratory problems. So, a person who is interested in exercise should never ignore the warnings so as to maintain a good health.

Answer:

The correct answer would be B. Ingestion, digestion, absorption, elimination.

Digestion refers to the breakdown of complex compounds into simpler elements.

The process of the digestive system can be sequenced as:

1. Ingestion: Intake of food from outside the body. For example, in humans, food is taken in from a mouth.
2. Digestion: The breakdown of complex compounds into simpler elements. For example, polysaccharides, polypeptides, and fats are converted into monosaccharides, amino acids, and fatty acid chains and glycerol respectively.
3. Absorption: The digested food is absorbed and transported to all parts of the body. In humans, the small intestine is the major site of food absorption.
4. Assimilation: The nutrients are transported or distributed to all cells of the body where they are utilized for power generation.
5. Excretion: The undigested food is then excreted out of the body. In humans, the solid waste is excreted through the anus.