Final answer:
The statement that at rest, most blood is within the venous system, is true. The false statement about the circulatory system is that blood in the pulmonary veins is deoxygenated when, in fact, it is oxygenated.
Step-by-step explanation:
The circulatory system is a crucial component of the human body, responsible for the distribution of blood, oxygen, and nutrients. When considering the statement at rest, most blood is within the venous system, the answer is true. The venous system contains a larger volume of blood than the arterial system. Now, addressing the false statement about the circulatory system:
- Blood in the pulmonary veins is deoxygenated. - False
- Blood in the inferior vena cava is deoxygenated. - True
- Blood in the pulmonary artery is deoxygenated. - True
- Blood in the aorta is oxygenated. - True
The false statement is (a), as blood in the pulmonary veins is actually oxygenated since it returns to the heart from the lungs after receiving oxygen.
Regarding exercise and systemic blood flow, during exercise, more blood is distributed to the body surface in the form of increased skin blood flow. This helps dissipate excess heat generated by physical activity.