Lymph from the lower half of the body drains into:

Correct Answer: C

Rationale: Lymph from the lower body drains into the thoracic duct via the cisterna chyli, which then empties into the left subclavian vein. The right lymphatic duct drains the upper right quadrant, and 'tracheal duct' is not a lymphatic structure.

Correct Answer: B

Rationale: Distended jugular veins in a supine position suggest increased central venous pressure (CVP), often due to right heart failure or fluid overload, as blood backs up into the venous system. Decreased venous return would collapse veins, and C and D are less directly indicated by this sign alone.

Correct Answer: A

Rationale: Meditation reduces sympathetic nervous system activity, lowering stress, heart rate, and oxygen demand, aiding MI recovery. B, C, and D increase cardiac workload, countering recovery goals.

Correct Answer: C

Rationale: The aorta (Choice A) is the largest artery, distributing oxygenated blood to the body. The pulmonary vein (Choice B) returns oxygenated blood from the lungs to the heart. The renal artery (Choice D) supplies the kidneys and is significant in systemic circulation. The femoral artery (Choice C), while important, is a regional vessel supplying the leg and not classified as a 'major' vessel like the aorta or pulmonary vein in the context of the cardiovascular system’s primary structure.