Nervous tissue is made up of neuurons and neuroglial cells. Which of the following statements about these two cells is (are) false ?
(i) Neuroglia make up more than one - half the volume of neural tissue in our body
(ii) Neuroglia protect and support neurons
(iii) When a neuron is suitably stimulated, an electrical disturbance is generated which swiftly travels along its cytosol
(iv) Arrival of the disturbance at the neuron's ending triggers stimulation of inhibition of adjacent neurons or other cells.

Options

A. (i) and (iv)
B. (ii) and (iii)
C. (iii) only
D. (iv) only

Answer

To determine which statements about neurons and neuroglial cells are false, we will evaluate each statement one by one.

### Step-by-Step Solution:

1. **Evaluate Statement (i)**: "Neuroglia make up more than one-half the volume of neural tissue in our body."
- **Analysis**: This statement is true. Neuroglial cells do indeed make up more than half of the volume of the nervous tissue.

2. **Evaluate Statement (ii)**: "Neuroglia protect and support neurons."
- **Analysis**: This statement is also true. The primary function of neuroglial cells is to provide support and protection to neurons.

3. **Evaluate Statement (iii)**: "When a neuron is suitably stimulated, an electrical disturbance is generated which swiftly travels along its cytosol."
- **Analysis**: This statement is false. The electrical impulse travels along the plasma membrane of the neuron, not through the cytosol. The cytosol is the fluid inside the cell, while the electrical signal is propagated along the membrane.

4. **Evaluate Statement (iv)**: "Arrival of the disturbance at the neuron's ending triggers stimulation or inhibition of adjacent neurons or other cells."
- **Analysis**: This statement is true. When the electrical impulse reaches the end of a neuron, it can stimulate or inhibit the activity of adjacent neurons or other types of cells.

### Conclusion:
The only false statement among the options provided is statement (iii). Therefore, the answer to the question is that statement (iii) is false.

### Summary of Findings:
- **True Statements**: (i), (ii), (iv)
- **False Statement**: (iii)