Answer:
The correct answer will be option-A.
Explanation:
The cardiac cycle of the heart is divided into two phases: contraction (systole) and relaxation (diastole).
The atria and ventricles of the heart contract simultaneously in response to the impulse generated in the SA node. The contraction of the atria and ventricles push the blood or pumps the blood.
The atrial systole pumps blood to ventricles whereas the ventricular systole pumps blood to the body parts.
Thus, option-A is the correct answer.
Retinopathy develops in patients with diabetes mellitus because of Retinal ischemia and red blood cell aggregation occurrence.
Anyone with diabetes can develop diabetic retinopathy.
Diabetes Retinopathy is caused by high blood sugar due to diabetes, having too much of sugar can damage retina.
At start of this, it might cause no symptoms or only mild vision problems. but longer can cause blindness.
as the time passes, too much sugar in blood leads to the blockage of the tiny blood vessels that nourish the retina and cuts off its blood supply.
and the eye attempts to grow new blood vessels. but they don't grow properly and can cause leakage.
Complications of retinopathy include blindness and also vitreous hemorrhage, Retinal detachment. and Glaucoma.
To prevent the risk, one should Manage your diabetes, monitor your blood sugar level and also keep BP and cholesterol under control.
To know more about diabetes retinopathy,
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Answer:
1. dendrite = directs impulses toward the soma.
2. axon = conducts impulses toward the synaptic terminal.
3. perikaryon = region surrounding nucleus.
4. collateral branches = main branches of an axon.
5. synaptic terminal = enlarged end of an axon.
6. synaptic vesicles = contains neurotransmitters.
7. axon hillock = connects the cell body and axon.
8. Nissl bodies = clusters of RER and free ribosomes.
9. telodendria = fine branches of an axon.
10. myelinated internode = part of axon covered by Schwann cell.
11. neurilemma = Schwann cell's plasma membrane.
12. axolemma = membrane of the axon.
13. astrocyte = Forms the blood-brain barrier.
14. cell body = soma.
An ultrasound because it is an imaging test that uses soundwaves to create a picture known as sonogram of organs tissues and other structures inside the body
