True or False: Arteries bring blood back to the heart?
A. TRUE
B. FALSE
Select your answer:

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Cell Cycle Soldiers of Defense Cells, Tissues and Organs Dental Caries Joints in our Body Tissues of The Body Selective Breeding The Skeletal System Hormones Disease Outbreak and Transmission Sensory Disorder Burns and Skin Cancer Eye Physiology Sarcomere Anatomy Immunology IBDOther quiz:
Vascular Surgery › ViewWhat is the purpose of a shunt during carotid endarterectomy?
A. If the blood flow from one artery is occluded and collateral circulation is not sufficient, the patient will suffer cerebral ischemia. A shunt alleviates the concerns for insufficient blood flow as it allows blood to bypass the surgical site to the brain while the operation proceeds.
B. To numb the surgical site
C. To reduce blood pressure
D. To remove excess blood
Microbiology › View
How are pyrimidines structurally different from purines in DNA nucleotides?
A. Pyrimidines have a double-ring structure, while purines have a single-ring structure.
B. Pyrimidines and purines both have a double-ring structure.
C. Pyrimidines have a single-ring structure, while purines have a double-ring structure.
D. Pyrimidines and purines both have a single-ring structure.