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An adequate level of pressure is needed in the arteries to keep the blood flowing through the cardiovascular system. The chief determinant of arterial pressure is the volume of blood in the arteries and the important determinants of this are the cardiac output and the peripheral vascular resistance. The resistance offered by the arterioles accounts for almost half the total resistance in the systemic circulation. The muscle in the arterial wall allows them to constrict or dilate. When they constrict, the resistance increases and the blood pressure increases. The vasomotor centre in the medulla when stimulated sends impulses via the sympathetic to the smooth muscle in the arteries, arterioles and veins which results in their constriction.
Spermiogenesis - Spermatogenesis At the end of the meiosis the spermatids appear as simple spherical cells with a centrally located nucleus. Their differentiation into sperm r
Mrs. TT seventy three-year old has a long history of chronic obstructive pulmonary disease (COPD). She came to the medical ward as shortness of breath, wheezing and a cough for the
what are the sub- headings in energy?describe energy in biology?
DONO R SELECTION & KIDNEY PRESERVATION - A kidney donor should be free of hypertension, diabetes & melignancy. Cardaveric kidney is obtained from brain death person. Kidney
Alcohol Related Emergencies: Alcohol is one of the most serious health problems. Alcoholism is defined as a primary or chronic disease with genetic, psychological and environ
Define Energy requirements of infants? Energy: Energy requirements of infants are based on the energy intake through breast milk by infants of well-nourished mothers. Based on
Q. What is an open circulatory system? Open circulatory system is the one in which blood doesn't circulate only inside blood vessels but it also falls in cavities that irrigate
When a ventricQlar septa1 defect (VSD) is present, with no aortic stenosis, the peak velocitgr across the defect reflects the difference in pressure between the right ventricle an
Explain Electron transport chain Electron transport chain :Transport of high-energy electrons through a series of carriers in mitochondria.
Would you expect the muscle fibers of the tongue to be striated or smooth? What about the muscle of the diaphragm/ Explain your answer.
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