Pulse is a measurement of

Options

A. Force of blood against the elastic walls of veins
B. Expansion and recoiling of elastic arteries
C. Force at which tissue fluid is formed
D. Speed at which blood passes through arteries

Answer

**Step-by-Step Solution:**

1. **Understanding Pulse**: Pulse is commonly referred to as the heart rate, which indicates how many times the heart beats in a minute.

2. **Evaluating the Options**:
- **Option 1**: "Force of blood against the elastic walls of veins."
- This statement is incorrect. The force of blood against the walls of blood vessels is referred to as blood pressure, which primarily pertains to arteries, not veins.

- **Option 2**: "Expansion and recoiling of the elastic arteries."
- This statement is correct. When the heart beats, it pumps blood into the arteries, causing them to expand. This expansion and subsequent recoiling is what we measure as pulse.

- **Option 3**: "Force at which tissue fluid is formed."
- This statement is incorrect. The formation of tissue fluid is related to capillary dynamics and not directly related to pulse measurement.

- **Option 4**: "Speed at which blood passes through arteries."
- This statement is also incorrect. The speed of blood flow is not the same as pulse; pulse specifically refers to the rhythmic expansion and contraction of arteries due to heartbeats.

3. **Conclusion**: After evaluating all the options, the correct answer is **Option 2: Expansion and recoiling of the elastic arteries**.

---