Answer:
Option A, Hormones are controlled by a feedback loop; information about a system is sent back to the controller of the system to improve its function.
Explanation:
Negative feedback loop controls the hormone production and release. This is done by eliciting the release of substances till a certain level after which the stop signal is activated thereby preventing further release. By this method, concentration of hormones in blood is maintained within the narrow range.
For example – Thyroid hormones is released when the anterior pituitary signals the thyroid. This continues till the hormones in the blood reach the threshold level. Once the threshold level is reached, hypothalamus receives a feedback and then signals anterior pituitary to inhibit further signaling to the thyroid
Hence, option A is correct
The <span>principal ways in which a load may be applied to a specimen are:
1. Tension
2. Compression
3. Shear
</span>
The force
that pulls material apart is tension and the one that squashes
material together is compression and shear is the action of the force in
trying to cut through the material.
<span> </span>
<span>
</span>
The first heart chamber that the dye would enter is right atrium.
This will be followed by
left ventricle
right ventricle
left atrium
coronary valve
I believe its C-Mitochondrion.
It the powerhouse of the cell.
-Steel jelly
DNA has thymine and RNA has uracil both of which pair with adenine.
Hope that helps.
