This topic contains a solution. Click here to go to the answer

Author Question: Which of the following mechanisms facilitate venous return to the heart? 1. Sodium/potassium pump 2. ... (Read 51 times)

javeds

  • Hero Member
  • *****
  • Posts: 570
Which of the following mechanisms facilitate venous return to the heart? 1. Sodium/potassium pump 2. Sympathetic venomotor tone 3. Cardiac suction 4. Skeletal muscle contraction
 
  a. 1 and 2 only
  b. 2, 3, and 4 only
  c. 1, 2, 3, and 4
  d. 3 and 4 only

Question 2

Why are the vessels of the venous system, particularly the small venules and veins, termed capac-itance vessels?
 
  a. They transmit and maintain the head of perfusion pressure.
  b. They can alter their capacity to maintain adequate perfusion.
  c. They determine the afterload on the left ventricle.
  d. They maintain a constant environment for the body's cells.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mbcrismon

  • Sr. Member
  • ****
  • Posts: 328
Answer to Question 1

ANS: B
The following four mechanisms combine to aid venous return to the heart: (1) sympathetic ve-nous tone, (2) skeletal muscle pumping, or milking (combined with venous one-way valves), (3) cardiac suction, and (4) thoracic pressure differences caused by respiratory efforts.

Answer to Question 2

ANS: B
By quickly changing its holding capacity, the venous system can match the volume of circulating blood to that needed to maintain adequate perfusion. Accordingly, the components of the venous system, especially the small, expandable venules and veins, are termed capacitance vessels.




javeds

  • Member
  • Posts: 570
Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it


mochi09

  • Member
  • Posts: 335
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

For a complete list of videos, visit our video library