Circulatory system Multiple Choice Questions (MCQ) PDF Download

MCQ 1: 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 2: When an artery dilates the

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

MCQ 3: In mammals, Endothelium is

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

MCQ 4: When the heart relaxes,

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

MCQ 5: 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