Question

1. the clips authors say that \our bodies need some salt to survive.\ salt is a type of matter. what is one way salt could benefit the body? justify your answer using particles.
2. researcher paul breslin says, in the clip, \in finland, when they lowered the salt intake, stroke and heart attack rates went way down, and mortality went way down.\ propose one way reduced salt intake could prevent a stroke or a heart attack.

Explanation:

1. Salt (sodium - chloride) contains sodium ions. Sodium ions play a crucial role in nerve impulse transmission. Nerve cells use the movement of sodium ions across their membranes to generate and propagate electrical signals (action potentials). When a nerve is stimulated, sodium channels open, allowing sodium ions to rush into the cell, which helps in the transmission of the nerve impulse throughout the body for functions like muscle movement, sensory perception, etc.
2. High salt intake can increase blood pressure by causing the body to retain more water (osmotic effect). Reducing salt intake can lower blood pressure. High blood pressure is a major risk factor for strokes and heart attacks as it puts extra strain on the blood vessels and the heart. By reducing salt intake, the heart doesn't have to work as hard against high - pressure blood flow, and the risk of blood vessel damage that can lead to stroke or heart attack is decreased.

Answer:

1. Salt can benefit the body by aiding in nerve impulse transmission. Sodium ions in salt are involved in the generation and propagation of action potentials in nerve cells.
2. Reduced salt intake can prevent a stroke or heart attack by lowering blood pressure, as high salt intake often leads to increased blood pressure which is a risk factor for these conditions.