Which of the following statements is false regarding the ...

[roselinechinyere27m]

Which of the following statements is false regarding the pulmonary circulation?
 
  a. Pulmonary blood flow is highly dependent on gravity.
  b. The pulmonary circulation is a low-pressure system.
  c. Toward the top of the upright lung, blood flow is high.
  d. Toward the top of the upright lung, blood flow is low.

Question 2

Pressures in the pulmonary circulation are lower than those in the systemic circulation because of what characteristic of the pulmonary circulation?
 
  a. Higher resistance than the systemic circu-lation
  b. Less blood flow than the systemic circula-tion
  c. Lower resistance than the systemic circu-lation
  d. More blood flow than the systemic circu-lation

[taylorsonier]

Answer to Question 1

ANS: C
As a consequence of having a low blood pressure and being susceptible to gravity, blood flow is much higher in the lung bases in resting upright subjects. Gravity-related effects also occur in re-cumbent positions but are less pronounced.

Answer to Question 2

ANS: C
While the entire cardiac output passes through both pulmonary and systemic circuits, the pulmo-nary circulation offers much lower resistance and, as a result, has a much lower blood pressure.

[roselinechinyere27m]

TYSM

[amcvicar]

Gracias!