Answer:
Hey Lilly, so did you know that twin studies have been conducted for more than 50 years but there is still some debate in terms of how much the variation is due to genetic or environmental factors. Identical twins are good for the "Age old Question" because "Twins" have been the main method for researching the genetic and environmental sources of variation between humans for a long time because of the availability that they give.
Explanation:
I hope I helped you, and u can chat me if you want me to explain a little more for you :)
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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>
Answer:
Explanation:
To say that someone is a peer implies that they are of equal standing. It can mean people who are of the same age, economic class, or grade within a profession. A peer group refers to a group of people of roughly the same age and status who spend time together. Peer pressure is the influence these people have on the life of the individual. It involves adapting behaviors that the individual would otherwise not adapt. If members of the group value a particular behavior there will be a kind of pressure to conform to this. So if friends drink alcohol, or use drugs, it can be hard to say no. Peer pressure can be a force for good or bad.
