1. If systemic vascular resistance increases, what happens to blood pressure and why? There are two...

1. If systemic vascular resistance increases, what happens to blood pressure and why? There are two ways.

2. What three things determine vascular resistance? What happens to vascular resistance as each increases or decreases?

3. What happens to blood pressure as you mive farther away from the heart? Is blood pressure higher in arteries or veins?

4. If venous return to the heart decreases, what happens to cardiax output and why?

Solutions

Expert Solution

1. ANSWER: If the systemic vascular resistance increases blood pressure increases. It is due to vasoconstriction of blood vessel which decreases the lumen size of vessel so that the blood flowing through it will be turbulent to increase the blood pressure.

2. ANSWER: Vascular resistance depends on three factors namely, peripheral resistance, blood flow and cardiac output. Increase in these factors would increase the blood pressure and its decrease will decrease the blood pressure.

3. ANSWER: Blood pressure falls as we move away from the heart as the pressure wave from the heart will be transmitted to all the parts of the body and when it reaches the lower limb it further decreases. Blood pressure in arteries is higher than in the veins as the heart contracts and transmits the blood into the arteries.

4. ANSWER: If the venous return decreases, cardiac output also decreases. It is because decreased venous return would decrease the right atrial pressure due to which the caridac output decreases.

Sydney Mullin answered 8 months ago

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