Umbilical vein which drains into the sinus venosus

ATI LPN

ATI LPN Test Bank

Umbilical vein which drains into the sinus venosus originate from?

A. Placenta B. Fetal body C. Yolk sac D. Septum

Correct Answer: A

Rationale: The umbilical vein carries oxygenated blood from the placenta to the fetus, draining into the sinus venosus.

In the figure above, when does the 3rd heart sound occur?

A. At point D B. Between point A and point B C. Between point B and point C D. Between point C and point D

Correct Answer: D

Rationale: The 3rd heart sound (S3) occurs in early diastole (between C and D) due to rapid ventricular filling.

What is the type of lactic acidosis associated with hypoxia?

A. Hypoxic lactic acidosis B. Type A lactic acidosis C. Type B lactic acidosis D. Chronic lactic acidosis

Correct Answer: B

Rationale: Type A lactic acidosis is associated with hypoxia, impairing oxidative metabolism.

BNP is a heart failure marker that causes:

A. Vasoconstriction B. Na resorption C. Decrease in blood pressure D. Decrease myoglobin levels

Correct Answer: C

Rationale: Brain natriuretic peptide (BNP) promotes vasodilation and natriuresis, lowering blood pressure.

Polyarteritis nodosa is associated with all the following except:

A. Hepatitis B B. Young adult C. Fibrinoid necrosis D. SLE

Correct Answer: D

Rationale: Polyarteritis nodosa is linked to hepatitis B and fibrinoid necrosis, not typically SLE.

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