The Brain and Spinal Cord Develop from the

question 42

Multiple Choice

The brain and spinal cord develop from the

• A) endoderm.
• B) neural tube.
• C) notochord.
• D) neural crest.
• E) somites.

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Definitions:

All-or-None Law

A principle stating that certain physiological responses will occur to their fullest extent once a stimulus reaches a threshold, without gradation in response.

Action Potential

A sudden and temporary electrical charge that sweeps through a neuron, allowing it to transmit a signal along the nerve pathway.

Neuron Fires

The process by which a neuron sends an electrical signal down its axon, transmitting information to other neurons, muscles, or glands.

Synaptic Communication

The process by which neurons communicate with each other through the release and reception of chemical neurotransmitters across the synaptic gap.