Hello. Please answer the four questions in a Detailed/Thorough Explanation. Plea

Question

Hello. Please answer the four questions in a Detailed/Thorough Explanation. Please be clear if handwritten so I can understand. I will rate! Thank You!

Explain why venous return and mean arterial pressure are reduced immediately after going from the supine to standing position

Explain the baroreceptor reflex response to a drop in blood pressure. Be sure to include changes in baroreceptor firing rate, changes in both branches of the autonomic nervous system, and effector organ/tissue responses.  

Explain how the sympathetic nervous system contributes to the increase in heart rate and cardiac output seen after exercise

Explain the mechanism(s) for the changes in total peripheral resistance observed immediately after exercise and after recovery

Explanation / Answer

Ans-1) The blood pressure tended to drop in the standing position compared with the sitting, supine and supine with crossed legs. Systolic and diastolic blood pressure was the highest in supine position when compared the other positions. There was a difference between systolic blood pressures and this was statistically significant (P < 0.001) but the difference between diastolic blood pressure was not statistically significant (P > 0.05). All changes in systolic blood pressure were statistically significant except those from supine to supine position with crossed legs.

Ans-2) Baroreceptors act immediately as part of a negative feedback system called the baroreflex, as soon as there is a change from the usual mean arterial blood pressure, returning the pressure toward a normal level. These reflexes help regulate short-term blood pressure. The solitary nucleus in the medulla oblongata of the brain recognizes changes in the firing rate of action potentials from the baroreceptors, and influences cardiac output and systemic vascular resistance. Baroreceptors can be divided into two categories based on the type of blood vessel in which they are located: high-pressure arterial baroreceptors and low-pressure baroreceptors (also known as cardiopulmonary or volume receptors).

Ans-3) Cardiac output (CO) is the term used to show the amount of blood pumped per minute by each ventricle. When your body's at rest, your heart beats about 75 times per minute. Each time it pumps, it pushes out about 75 milliliters the blood.

Ans4)Cardiovascular Response to Exercise. As muscles begin exercising, the arterioles serving the muscle dilate to provide more blood flow. By itself, this vasodilation would lower the total peripheral resistanceand thus mean arterial pressure.

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.