Answer:
Less than 4-5 sentences?? I'll take the challenge!!! :))
Ya have to wait about 90 days until you can take the vaccine and get immunity from Cov id-19. The macrophages in your body will help ya fightin and be immune to this darn virus!! Your antibody made by the B cells will get ya helpin in the vaccine!! Before ya do the immunity vaccine test though, you'll be taken through a Antigen test to diagnose what ya have. Then ya will get immune by taking the vaccine than later!! :)))
Answer:
The correct option is : a. causing threshold to be reached more quickly
Explanation:
Norepinephrine, also known as noradrenalin, is an organic compound, which belongs to the catecholamine family. It acts as a hormone and a neurotransmitter in the brain and the body and also impacts the heart.
It is one of the hormones secreted by the adrenal medulla. Norepinephrine is a part of the fight-or-flight mechanism of the body. It acts by binding to the β-1 receptors and opens the chemical or ligand gated calcium and sodium ion channels. Therefore, <u>it causes the threshold to be reached faster </u>by increasing the rate of depolarization and thus causes heart arrhythmia.
Therefore, <u>Norepinephrine acts on the heart by </u><u>causing threshold to be reached faster.</u>
Confirmatory Tests vary, and may be wrong from time to time. As time passes, the test is not as reliable as stated. If the so called "blood" is on a leather surface, blood isn't too prone to sticking to leather, so it may (or may not) be blood.
