Answer:
Calcium
Explanation:
Parathyroid hormone (PTH) is a hormone that is secreted by the parathyroid gland. It is the major regulator of the plasma concentration of calcium ions. It regulates calcium ions in the kidney, intestine and bones.
In the kidney, is involved in the re-absorption of calcium in distal ducts and the renal collecting duct, it is also involved in activating the conversion of 25-hydroxy vitamin D into 1,25-dihydroxy vitamin D (calcitriol).
In the intestine, PTH is involved in the absorption of calcium, by increasing vitamin D production.
In the bone, it helps in regulating calcium levels; when serum calcium level is low, PTH stimulates the activity of the osteoclast, to produce more calcium.
<span>A symbiotic relationship in which one organism lives inside the other and both organisms benefit is the correct answer </span>
The answer is B. Primary. Gordon Allport grouped personality traits by:
cardinal traits - master traits, most dominant personality, most observable trait.
Central traits - general traits, building blocks of what shapes the person's behavior.
Secondary trait- not obvious traits as central traits, observable during a certain situation/ when the need arises.
Answer:
B. New predators move into the ecosystem.
Explanation:
A, C, and D are all abiotic (nonliving) factors that could limit a community in an ecosystem.
