NURS 6501: MIDTERM EXAM: Please contact Assignment Samurai for help with NURS 6501: Midterm Exam or any other assignment. Email: assignmentsamurai@gmail.com   If an elastic band were to constrict the ascending aorta by 50%, which of the following would NOT be an anticipated response? Group of answer choices

• The cardiac muscle would synthesize more protein.
• The thickness of the cardiac muscle would increase.
• The volume of blood ejected with each heartbeat would increase.
• The heart would react similarly to how it does in cases of hypertension.

  The correct answer is: The volume of blood ejected with each heartbeat would increase. Explanation: Constriction of the ascending aorta by 50% would lead to an increase in afterload (the resistance the heart must work against to pump blood). This would cause the heart to work harder to overcome the obstruction. However, the volume of blood ejected with each heartbeat (stroke volume) would likely decrease, not increase, due to the increased difficulty in ejecting blood through a constricted aorta. Other responses:

• The cardiac muscle would synthesize more protein: In response to increased workload (such as in hypertension or aortic constriction), the heart's muscle cells (cardiomyocytes) may undergo hypertrophy, leading to increased protein synthesis as part of the adaptation process.
• The thickness of the cardiac muscle would increase: As a result of the increased afterload (due to the constricted aorta), the heart muscle (specifically the left ventricle) would thicken, a process known as left ventricular hypertrophy. This helps the heart to generate more force to pump blood against the higher resistance.
• The heart would react similarly to how it does in cases of hypertension: In response to increased afterload, the heart's adaptation mechanism would be similar to that in hypertension—it would attempt to pump against the higher resistance by thickening the muscle and increasing contractility.

Thus, the volume of blood ejected with each heartbeat would decrease in this scenario due to increased resistance to flow, not increase.