Question

1. describe how hypertension affects the heart.
2. what part of the heart is known as the \gatekeeper\ and why is

Explanation:

For question 5: Hypertension (high blood pressure) forces the heart to pump against increased resistance in blood vessels. Over time, this causes the left ventricular wall to thicken (left ventricular hypertrophy) to compensate, which reduces the heart's ability to fill and pump blood efficiently. It also raises the risk of coronary artery disease, heart failure, arrhythmias, and heart attacks by straining the heart muscle and damaging blood vessels supplying the heart.
For question 6: The mitral (bicuspid) valve is often called the heart's "gatekeeper". It is located between the left atrium and left ventricle, and it prevents oxygen-rich blood from flowing backward into the left atrium when the left ventricle contracts to pump blood out to the body, ensuring unidirectional blood flow.

Answer:

1. Hypertension increases the pressure the heart must pump against, leading to left ventricular hypertrophy (thickening of the left heart wall) over time. This reduces the heart's pumping efficiency, raises the risk of coronary artery damage, heart failure, abnormal heart rhythms, and myocardial infarction, as the heart muscle is chronically strained and blood flow to the heart can be compromised.
2. The mitral (bicuspid) valve is the "gatekeeper" of the heart. It acts as a one-way valve between the left atrium and left ventricle, preventing oxygenated blood from flowing backward into the atrium when the ventricle contracts, thus maintaining unidirectional, efficient blood circulation to the body.