<h3><u>Answers;</u></h3>
-less than 1%
-Thrombopoiesis
-Megakaryoblast
-Thrombopoietin
-Megakaryocyte
-Proplatelets
-Platelets (thrombocytes)
<h3><u>Explanation</u>;</h3>
- Platelets (or thrombocytes) make up less than 1% of formed elements with a concentration between 150,000 and 400,000 per cubic millimeter. The production of platelets is called thrombopoiesis.
- From the myeloid stem cell, a committed cell called a megakaryoblast is produced. It matures under the influence of thrombopoietin to form a megakaryocyte.
- Megakaryocytes are easily distinguished both by their large size (about 100 micrometers [μm] in diameter) and their dense, multilobed nucleus. Each megakaryocyte then produces thousands of platelets.
- The process of how megakaryoctes produce thrombocytes was in question until 2007. Researchers reported that megakaryoctes produce long extension from themselves called proplatelets.
- While still attached to the megakaryoctye, these proplatelets extreough the blood vessel wall in the red bone marrow. The force from the blood flow "slices" these proplatelets into the fragments we know as platelets (thrombocytes).
Answer:
The correct answer will be- Juxtaglomerular cells or the granular cells
Explanation:
In the juxtaglomerular apparatus which is formed by the distal convoluted tubule and the glomerular afferent tubule contains specialized epithelial cells which detect the concentration of the sodium ions in the fluid and contract the afferent arteriole.
The juxtaglomerular cells are derived from the smooth muscle cells of the afferent arterioles present adjacent to the macula dense which is involved in the production of the renin when the blood pressure falls and thus increases the blood pressure.
Thus, Juxtaglomerular cells are the correct answer.
The lungs are where the gases in the blood are exchanged. CO2 for O2.. The exchange of gases that occurs in the lungs is done through capillaries, after the blood from the veins is emptied into the heart. Then the heart pumps blood from the veins to the lungs.
The Heart pumps oxygenated blood through the arteries. The veins return the blood to the heart.
