Answer:
Pancreas- It mainly function as an endocrine gland, secreting a number of digestive enzymes. Along with that it has a very unique function of secretion of hormones which mainly regulate the blood sugar level. The hormones are secreted by the pancreatic islets also known as islet of Langerhans.
These hormones secreted are glucagon, insulin, somatostatin, and pancreatic polypeptide (PP). Mainly the secretion of glucagon and insulin is done for balancing the level of glucose in blood.
Explanation:
The beta cell produces the hormone insulin, as each islet is comprised of 75 percent of beta cells.
Elevated blood glucose levels stimulate the release of insulin. Now, the function of insulin is to balance the blood sugar level.
<u>Secretion of Insulin Step by step:</u>
- It all starts from the presence of food in the intestine which initiates the release of gastrointestinal tract hormones such as glucose-dependent insulinotropic peptide.
- This is in turn the initial trigger for insulin production and secretion by the beta cells of the pancreas.
- Once nutrient absorption occurs, the resulting surge in blood glucose levels further stimulates insulin secretion.
- insulin appears to activate a tyrosine kinase receptor, triggering the phosphorylation of many substrates within the cell.
- These multiple biochemical reactions converge to support the movement of intracellular vesicles containing facilitative glucose transporters to the cell membrane.
- Insulin triggers the rapid movement of a pool of glucose transporter vesicles to the cell membrane, where they fuse and expose the glucose transporters to the extracellular fluid.
- The transporters then move glucose by facilitated diffusion into the cell interior.
Note:However, the red blood cells, as well as cells of the brain, liver, kidneys, and the lining of the small intestine, do not have insulin receptors on their cell membranes and do not require insulin for glucose uptake.
Its the two first one, I took this
I watched a vid on bill nye, u should to he explains it good
Answer:
they control small specific functions in the cell
Explanation:
genes are very crucial in every organisms since they determine the tiniest composition of the cell,evolving from the parent organism.
A and B are true of whole populations but not individuals and they are not something that young animals can "do" - we reject these options.
C. Yes- this means that they leave the territory of their parents and search for new territories: this is the correct answer.
Geological timeline is the chronological dating of the organisms and the geological happening in the orderly manner of the years and dates. The oldest mammals lived 200 million years ago.
<h3>What are the different species that arrived in the geological timelines?</h3>
5 million years ago humans arrived, 200 million years ago first mammal organism, 1.5 billion years ago complex single-celled organisms and 4.5 billion years ago Earth was formed.
The geological timeline is important as it portrays the presence and arrival of the organisms and the formation of some of the structures.
Therefore, mammals arrived at option B. 200 million years ago.
Learn more about the geological timeline here:
brainly.com/question/13580987