Identify the incorrect statement.
- AMyelinated nerve fibers are found in spinal and cranial nerves.
- BUnmyelinated nerve fiber is enclosed by a Schwann cell that does not form a myelin sheath around the axon.
- CIn a resting state,the axonal membrane is more permeable to potassium ions $(K^+)$ and nearly impermeable to sodium ions $(Na^+)$.
- DThe axonal membrane is highly permeable to negatively charged proteins present in the axoplasm.
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Similar Questions
When a stimulus is applied to the membrane of a neuron,it causes a rapid influx of
The potential difference between the outside and inside of a nerve fiber before excitation is known as:
Medium
View SolutionConsider the statements as True/False:
$I$. The axoplasm inside the axon contains a high concentration of $K^{+}$ and negatively charged proteins.
$II$. The axoplasm inside the axon contains a low concentration of $Na^{+}$.
$III$. The fluid outside the axon contains a low concentration of $K^{+}$.
$IV$. The fluid outside the axon contains a high concentration of $Mg^{++}$ and negatively charged proteins.
The correct option is:
$I$. The axoplasm inside the axon contains a high concentration of $K^{+}$ and negatively charged proteins.
$II$. The axoplasm inside the axon contains a low concentration of $Na^{+}$.
$III$. The fluid outside the axon contains a low concentration of $K^{+}$.
$IV$. The fluid outside the axon contains a high concentration of $Mg^{++}$ and negatively charged proteins.
The correct option is:
Medium
View SolutionConduction of an impulse along the axon is associated with the
Medium
View SolutionMaintenance of the ionic gradients across the resting membrane is done by the
Medium
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