Muscles and nerves resemble in  

Options

A. contractility and conductivity
B. contractility
C. excitability and conductivity
D. all the above

Answer

To answer the question "Muscles and nerves resemble in," we need to analyze the properties of both muscle and nerve cells. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Properties of Muscle and Nerve Cells
- **Muscle Cells**: These cells are known for their ability to contract, which allows movement. They can shorten and generate force.
- **Nerve Cells**: These cells are primarily responsible for transmitting signals throughout the body. They do not contract but can conduct electrical impulses.

### Step 2: Define Key Terms
- **Contractility**: This refers to the ability of a cell to contract or shorten. This property is primarily associated with muscle cells.
- **Conductivity**: This is the ability of a cell to transmit electrical impulses to other cells. Both muscle and nerve cells exhibit this property.
- **Excitability**: This is the ability of a cell to respond to stimuli and generate an action potential. Both muscle and nerve cells can respond to stimuli.

### Step 3: Analyze the Options
- **Contractility**: Only muscle cells exhibit contractility. Nerve cells do not contract.
- **Conductivity**: Both muscle and nerve cells can conduct impulses.
- **Excitability**: Both muscle and nerve cells can respond to stimuli.

### Step 4: Eliminate Incorrect Options
- Since contractility is not a property of nerve cells, any option that includes contractility can be eliminated.
- The remaining options are excitability and conductivity.

### Step 5: Conclusion
The correct answer to the question is that muscles and nerves resemble in **excitability and conductivity**. Therefore, the correct option is: **Excitability and Conductivity**.