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.
I believe the answer would be B where the condensed chromosomes line up at the equator of the cell.
water table
saturation zone
Explanation:
Water table and saturation zone are two terms from the given choices that are used to identify layers of underground water.
Underground water is also called ground water. They are usually contained in porous and permeable layers within the earth.
- Water table is the uppermost layer below which ground water fills the pores.
- The water table in a place varies with seasons.
- The saturation zone is the zone below the water where the pore spaces are completely filled with water.
lean more:
Biogeochemical cycle brainly.com/question/3509510
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Answer:
Endocytosis, exocytosis
Explanation:
The uptake of material through the plasma membrane by the formation of a vesicle is endocytosis, whereas the fusion of a vesicle with the plasma membrane and the release of its contents outside of the cell is called exocytosis.
Endocytosis and exocytosis are two active transport processes through which cells move macromolecules across the cell membrane.
<em>While the former involves the capturing of materials from the surrounding of the cell and engulfing such through the cell membrane by forming a phagocytic or pinocytic vesicle, the latter involves the fusion of vesicles to the plasma membrane and the release of the contents of the vesicles to the outside of the cell.</em>
