Answer: False
Explanation:
A hormone can have multiple function based on the cell on which it is received which means that it depends on the receptor on which the hormone is received.
A single hormone has more than one specific function as it depends on receptors because one hormone can have multiple receptors.
The same can be coupled to different intracellular pathway in the different cell types.
hence, the given statement is False, a single hormone carries out different function.
Answer: dependency is more likely in cultures where access to alcohol is carefully controlled.
Explanation:
Studies have shown that in cultures where access to alcohol is carefully controlled and viewed as a sign of adulthood, dependency is more likely than in cultures where alcohol is used in religious and ceremonial activities.
This has been put down to people tending to abuse alcohol when they get access to it as opposed to cultures where it is readily available.
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:
The correct answer is option B- pressure within the alveoli.
Explanation:
Intrapulmonary pressure is the pressure within the lungs especially in the alveoli of the lungs so is also known as "intra-alveolar pressure".
This pressure helps in the breathing process as :
1. During inspiration - The thoracic cavity volume increases due to which the intra-pulmonary pressure becomes less than the atmospheric pressure which causes the lungs to inhale about 500 ml of air.
2. During expiration- the thoracic volume decreases which cause the intra-pulmonary pressure larger than atmospheric pressure which causes the lungs to exhale the air.
Thus, option B- pressure within the alveoli is the correct answer.
