T or F 26. Endothelial cells can secrete substances that cause either vasoconstr

Question

T or F 26.           Endothelial cells can secrete substances that cause either vasoconstriction or vasodilation.

T or F 27.           Even though blood pressure decreases throughout the circulatory system, when it finally gets back to the heart from the systemic circuit, the pressure in the veins is still relatively high.

T or F 28.           The decrease in arterial compliance due to atherosclerosis will cause the mean arterial pressure to lower in that individual.

T or F 29.           If the activity of the SA node is depressed or blocked another portion of the conducting system can take over as pacemaker and set the heart rate.

T or F 30.           Just standing up from a lying, or horizontal position can cause a decrease in the effective circulating blood volume.

Explanation / Answer

2. This statement is false

3. This statement is true

4. This statement is true

5 This statement is false

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