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Author Question: Which of the following opposes the flow of blood back to the heart? A) vascular resistance B) ... (Read 109 times)

Sportsfan2111

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on: Feb 27, 2019
Which of the following opposes the flow of blood back to the heart?
 A) vascular resistance
  B) peripheral veins have valves to prevent backflow of blood
  C) muscular pumps squeeze veins and move blood toward the heart
  D) blood pressure
  E) blood pressure gradient from arteries to veins

Question 2

The average length of the menstrual cycle is ________ days.
 A) 16
  B) 19
  C) 21
  D) 28
  E) 35


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frejo

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Reply #1 on: Feb 27, 2019
Answer to Question 1

A

Answer to Question 2

D


Sportsfan2111

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Reply #2 on: Feb 27, 2019
Thanks


frejo

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Reply #3 on: Feb 27, 2019
Welcome :)


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