____ Is Practically Pure Iron (In Plain Carbon Steels) Existing

question 19

Multiple Choice

____ is practically pure iron (in plain carbon steels) existing below the lower transformation temperature.

• A) Ferrite
• B) Cementite
• C) Pearlite
• D) Austenite

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Definitions:

Voltage-Gated

Refers to ion channels that open or close in response to changes in membrane potential, critical for nerve impulse conduction.

Node of Ranvier

Gaps in the myelin sheath of nerve fibers where the axonal membrane is exposed, facilitating rapid signal conduction along the neuron.

Axon

The long extension of the neuron that transmits nerve impulses away from the cell body. Compare with dendrite.

Dendrite

A branched extension of a neuron that receives stimuli and conducts impulses toward the cell body.