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Circulatory system MCQ with Answers

Circulatory system Multiple Choice Questions (MCQ) to solve circulatory system quiz answers PDF worksheet, O level biology test for online courses. Practice transport in mammals Multiple Choice Questions and Answers (MCQs), "Circulatory system" quiz questions and answers for SAT practice test. Learn production of antibodies, organ transplantion and rejection, free online biology, blood and plasma test prep for two year degree programs.

"Pulmonary veins carry" Multiple Choice Questions (MCQ) on circulatory system with choices red oxygenated blood, bluish red deoxygenated blood, deoxygenated blood from heart to the lungs, and oxygenated blood from lungs to heart for SAT practice test. Solve circulatory system quiz questions for merit scholarship test and certificate programs for online colleges for teaching.

MCQs on Circulatory system


Pulmonary veins carry

red oxygenated blood
bluish red deoxygenated blood
deoxygenated blood from heart to the lungs
oxygenated blood from lungs to heart


When an artery dilates the

lumen becomes constricted
lumen gets wider
person may appear pale
elastic muscles become ineffective


In mammals, Endothelium is

elastic in nature
fully permeable
selectively permeable


When the heart relaxes,

person respires
peristalsis movements occur
bile is produced
the heart gets filled with blood


Veins do not require thick walls

as they do not have to work harder
they are required only occasionally
the blood pressure declines while it gets to veins
the blood pressures is immense