Answer:
A: Oxygen levels are low and, therefore, more red blood cells are produced, giving the athletes an advantage when competing at lower altitudes.
Explanation:
<em>At high altitudes, the partial pressure of oxygen is lower compared to lower altitudes</em>. The body system try to adjust to lower oxygen level by undergoing several physiological changes. Depending on the duration spent in high altitude, the body can either try to adjust in the short term or acclimatize for a longer term.
One of the processes the body undergoes during acclimatization is an increase in red blood cell production. The kidney secretes erythropotein in response to inadequate oxygen in body tissues, and this makes the liver to increase erythrocyte production.
The increase in red blood cell production correspondingly increases the oxygen-carrying capacity of the blood as a result of increased hemoglobin. This condition persists for a few weeks even after the body returns to lower altitude where oxygen is adequate. Increased oxygen capacity means the rate of energy production (through respiration) within the body will also increase
<em>Hence, those who acclimatize to high altitude usually experience increased capillary density, tissue perfusion and improved athletic performance at lower altitudes. </em>
The correct option is A.
Answer:
The DNA of any individual possesses genetic traits which vary from individual to individual. Traits can be physical traits or behavioral traits.
Explanation:
Example of a physical trait would be the appearance of an individual and behavioral trait refers to the nature of the individual. Both vary from individual to individual.
Acid has a different chemical reaction than the water molecules. So when animals and other organisms swim, drink, or eat out of a body of water with acid precipitation in it it will probably kill them. Acid is in lemons and other foods we eat and drink so what kind of acid is it talking about? Is it talking about a harmful substance that would kill anything or a substance that is edible.
This is false. Triglycerides are lipids you obtain from fat, and are more commonly referred to when talking about fatty build up like cholesterol. Phospholipids are derivatives of triglycerides and are more for insulation of cells.
We will solve assuming the formula is:
h(t)=-14t^2+148t+7.8, where h is the height of the ball in feet and t is the time in seconds since it is pitched
We need to find t, t > 0, such that h(t) = 0
-14t^2+148t+7.8 = 0
t = 10.6 s
The ball will stay in the air for 10.6 seconds.
