Answer:
Explanation:
Acid-base disturbances have profound effects on the body. Acidemia results in arrhythmia, decreased cardiac output, depression, and bone demineralization. Alkalemia results in tetany and convulsions, weakness, polydipsia and polyuria. Thus, the body will immediately respond to changes in pH or H+, which must be kept within strict defined limits. As soon as there is a metabolic or respiratory acid-base disturbance, body buffers immediately soak up the proton (in acidosis) or release protons (alkalosis) to offset the changes in H+ (i.e. the body compensates for the changes in H+). This is very effective so minimal changes in pH occur if the body is keeping up or the acid-base abnormality is mild. However, once buffers are overwhelmed, the pH will change and kick in stronger compensatory responses. Remember that the goal of the body is to keep hydrogen (which dictates pH) within strict defined limits.
Answer:
Vestigial Structures
Explanation:
Structures that were needed for an organism's ancestor, but no longer required for survival for the current organism. We needed our wisdom teeth and appendix in order to eat tougher foods, but now we do not need those to survive. But, we still have them.
Answer:
1.3 s
Explanation:
A first-order reaction can be represented through the following expression.
ln [A] = ln [A]₀ - k.t
where,
[A] is the concentration of the reactant A at a certain time t
k is the rate constant
When the concentration decreases to half its value ([A] = 0.5 [A]₀), the time elapsed is known as half-life t(1/2).
ln (0.5 [A]₀) = ln [A]₀ - k.t(1/2)
ln 0.5 = -k.t(1/2)
t(1/2) = -ln 0.5 / k = - ln 0.5 / (0.54 s⁻¹) = 1.3 s
Answer: The correct option is C.
Phosphorus has no atmospheric component.
Explanation:
This is because, phosphorus is not in gaseous state but it is liquid at normal temperature, therefore it cannot be found in the air. It is cycle through water,soil or sediments. The major source of phosphorus in the phosphorus cycle is the rock. Rock contain phosphorus and phosphorus I'd gotten from rocks through weathering. Weathering is the disintegration of rocks into sediments or smaller particles. This is released into the soil after weathering.