Epithelial tissue I hope it help
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>
There are fewer antifungal, anti protozoan, and antihelminthic drugs compared to antibacterial drugs because these cells can be similar to human cells and therefore they can not achieve selective toxicity.
<h3>What is drug selective toxicity?</h3>
The expression 'drug selective toxicity' makes reference to the ability of a specific medication to discriminate between cells of different organisms (in this case human cells and other types of eukaryotic cells).
Drug selective toxicity is a fundamental issue during drug discovery and drug development.
In conclusion, there are fewer antifungal, anti protozoan, and antihelminthic drugs compared to antibacterial drugs because these cells can be similar to human cells and therefore they can not achieve selective toxicity.
Learn more about drug selectivity here:
brainly.com/question/13700694
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It will affect your basic senses of pressure, temperature, vision, hearing, taste, smell, touch and pain.
