Answer: Trigger the production of anti-bodies
Explanation:
An antigen is a substance that can provoke an immune reaction, these can produce antibodies through the immune system which identifies and neutralizes viruses, bacteria and other pathogens.
An antigen can be an external or harmful molecule for the organism, when it enters the body it binds to a specific antibody which have great variability to promote immunological reactions.
Answer:
The correct answer is True.
Explanation:
Parathyroid hormone or the PTH released from the parathyroid gland present on the thyroid gland. PTH is also known as parathyrine which is essential in the regulation of blood calcium by its different effects on bone, kidney, and intestine.
PTH increased calcium absorption in the intestine when secreted. It also removes calcium from the bones by the activity of osteoclast. The effect of PTH hormone in the kidney is that it conserves calcium ions.
Thus, the correct answer is true.
Maybe a hoodie or a baggy shirt and sweatpants?
It is called so because it is applicable on all bodies having mass, and the bodies will be governed by the same law, that is newton's law of gravitation. Thus, as it is applicable universally, it is called as universal law
Answer:
The correct answer will be option-B.
Explanation:
Papillary muscles are the muscle present in the ventricle of the heart to which chordae tendinae of the aortic valves gets attached.
The number of papillary muscles varies in both the ventricles as in the right ventricle, three papillary muscles are present whereas in the left ventricle two muscles.
They play an important role in the closing of the AV valves as ventricular contraction causes the chordae tendinae to contract which in turn contract the papillary muscles thereby closing the AV valve and prevent back-flow of the blood to the atria.
Thus, Option-B is the correct answer.
papillary muscles by chordae tendineae. During the relaxation phase of the cardiac cycle, the papillary muscles are also relaxed and the tension on the chordae tendineae is slight (see Figure 12b). However, as the myocardium of the ventricle contracts, so do the papillary muscles. This creates tension on the chordae tendineae (see Figure 13b), helping to hold the cusps of the atrioventricular valves in place and preventing them from being blown back into the atria.
