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Plant Anatomy and Physiology

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Questions and Answers

What is the primary function of the myelin sheath in neurons?

To release neurotransmitters into the synaptic cleft
To transmit electrical signals to the postsynaptic cell
To regulate the resting potential of the neuron
To insulate the axon from the surrounding environment (correct)

What is the maximum speed at which an action potential can travel along a myelinated axon?

200 m/s
150 m/s (correct)
100 m/s
10 m/s

What is the primary mechanism of transmission at a synapse?

Chemical signaling (correct)
Mechanical signaling
Electrical signaling
Thermal signaling

What is the purpose of the synaptic cleft?

To allow for the transmission of electrical or chemical signals (A) Signup and view all the answers

What is the term for the release of neurotransmitters from the presynaptic neuron?

Exocytosis (B) Signup and view all the answers

What is the function of voltage-gated channels in myelinated axons?

To generate action potentials (C) Signup and view all the answers

What is the primary function of the spinal cord?

To connect peripheral nerves with the brain (B) Signup and view all the answers

What is the purpose of nodes in myelinated axons?

To increase the speed of action potential propagation (C) Signup and view all the answers

What is the term for the gap between the presynaptic neuron and the postsynaptic neuron?

Synaptic cleft (A) Signup and view all the answers

What is the primary function of neurotransmitters?

To excite or inhibit the activity of the postsynaptic cell (A) Signup and view all the answers

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