The hormone <u>adrenocorticotropin hormone</u> (ACTH). which is secreted by the adrenal cortex, causes the kidney to conserve <u>sodium</u> ions and excrete <u>potassium</u> ions and indirectly helps to maintain systemic blood pressure.
<h3>What are hormones?</h3>
Hormones are chemical messangers or substances which are produced by the body and released to the sites where they are needed in the body
So therefore, the hormone adrenocorticotropin hormone (ACTH). which is secreted by the adrenal cortex, causes the kidney to conserve sodium ions and excrete potassium ions and indirectly helps to maintain systemic blood pressure
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Answer:
True
Explanation:
They are unbiased they have to consider everything before coming to a conclusion.
Answer:
The second sperm entry is blocked by the fertilized oocyte.
Explanation:
An ovum prevents polyspermy by two mechanism:
1. When the first sperm fuses with the oocyte then rapid depolarization of egg's plasma membrane takes place which prevents other sperms to fuse with the egg.
2. The fusion of sperm cause an increase in the amount of calcium ion in the cytosol of egg. This higher calcium level activates the development of egg which results in the change in the structure of the egg's outer layer. The outer layer(zona pellucida) becomes hard and prevent the entry of other sperms.
So the chromosomes from the 2nd sperm cell will not normally function in the resulting embryo because the fertilized oocyte block the entry of other sperms.