Circulatory system MCQs Quiz Online PDF Download

Practice circulatory system MCQs, O level biology MCQ test for online learning. Transport in mammals quiz has multiple choice questions (MCQ), circulatory system quiz questions and answers to practice as pulmonary veins carry, answer key help with choices as red oxygenated blood, bluish red deoxygenated blood, deoxygenated blood from heart to lungs and oxygenated blood from lungs to heart problem solving for viva, competitive exam preparation, interview questions. Free study guide is for online learning circulatory system quiz with MCQs to practice test questions with answers.

MCQs on Circulatory system Quiz PDF Download

MCQ. Pulmonary veins carry

  1. red oxygenated blood
  2. bluish red deoxygenated blood
  3. deoxygenated blood from heart to the lungs
  4. oxygenated blood from lungs to heart


MCQ. When an artery dilates

  1. the lumen becomes constricted
  2. the lumen gets wider
  3. person may appear pale
  4. the elastic muscles become ineffective


MCQ. Endothelium is

  1. elastic in nature
  2. fully permeable
  3. selectively permeable
  4. non-permeable


MCQ. When the heart relaxes,

  1. person respires
  2. peristalsis movements occur
  3. bile is produced
  4. the heart gets filled with blood


MCQ. Veins do not require thick walls

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