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Which type of neuron is characterized by having more than two extensions from the cell body?

Bipolar Neuron

Pseudounipolar Neuron

Unipolar Neuron

Multipolar Neuron (correct)

What is the primary function of the sodium-potassium pump?

To balance the concentrations of ions during an action potential

To facilitate the influx of Na+ into the cell

To maintain the higher concentration of K+ inside the cell (correct)

To ensure the leakage of ions across the membrane is uniform

Which statement accurately describes the permeability of the cell membrane with respect to K+ and Na+?

The membrane is more permeable to Na+ than to K+

The membrane has greater permeability to K+ than to Na+ (correct)

The membrane is impermeable to both K+ and Na+

The membrane is equally permeable to both K+ and Na+

What distinguishes bipolar neurons from other types of neurons?

They possess only one axon and one dendrite Signup and view all the answers

Which ion channel type is always open and contributes to maintaining resting membrane potential?

Leak Channels Signup and view all the answers

What type of neurons carry impulses from sensory receptors to the central nervous system?

Sensory Neurons Signup and view all the answers

Which of the following describes the structure of white matter in the PNS?

Consists of bundles of axons and connective tissue Signup and view all the answers

What is the function of interneurons?

To connect sensory and motor neurons Signup and view all the answers

Which statement accurately describes unipolar neurons?

They have a short, single process leaving the cell body Signup and view all the answers

In the context of resting membrane potential, which ion is typically found in higher concentrations outside the cell?

Sodium (Na+) Signup and view all the answers

What is the key role of conductivity in neurons?

Ability to transmit an impulse Signup and view all the answers

What primarily happens at the point of equilibrium regarding potassium ions in resting membrane potential?

The negative charge attracts K+ back into the cell balancing the gradient Signup and view all the answers

Which type of neuron has its cell bodies located primarily in the central nervous system?

Motor Neurons Signup and view all the answers

What initiates the action potential in a neuron?

Sodium ions flowing inside the neuron Signup and view all the answers

Which type of conduction occurs in myelinated axons?

Saltatory conduction Signup and view all the answers

What is the role of the sodium-potassium pump after an action potential?

To restore the original ion concentrations inside and outside the neuron Signup and view all the answers

What best describes the synaptic cleft?

The space between the presynaptic terminal and postsynaptic membrane Signup and view all the answers

What occurs during repolarization of a neuron?

Potassium ions rush out of the neuron Signup and view all the answers

What is a critical feature of a reflex arc?

It allows for rapid responses to stimuli Signup and view all the answers

Which statement is true regarding neurotransmitters?

They are stored in synaptic vesicles until needed. Signup and view all the answers

What is the primary function of voltage-gated channels in neurons?

To open in response to changes in membrane potential Signup and view all the answers

What does continuous conduction refer to?

The slow transmission of signals along unmyelinated axons Signup and view all the answers

What happens immediately after sodium ions rush into the neuron?

An action potential is initiated Signup and view all the answers

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Questions and Answers

Which type of neuron is characterized by having more than two extensions from the cell body?

What is the primary function of the sodium-potassium pump?

Which statement accurately describes the permeability of the cell membrane with respect to K+ and Na+?

What distinguishes bipolar neurons from other types of neurons?

Which ion channel type is always open and contributes to maintaining resting membrane potential?

What type of neurons carry impulses from sensory receptors to the central nervous system?

Which of the following describes the structure of white matter in the PNS?

What is the function of interneurons?

Which statement accurately describes unipolar neurons?

In the context of resting membrane potential, which ion is typically found in higher concentrations outside the cell?

What is the key role of conductivity in neurons?

What primarily happens at the point of equilibrium regarding potassium ions in resting membrane potential?

Which type of neuron has its cell bodies located primarily in the central nervous system?

What initiates the action potential in a neuron?

Which type of conduction occurs in myelinated axons?

What is the role of the sodium-potassium pump after an action potential?

What best describes the synaptic cleft?

What occurs during repolarization of a neuron?

What is a critical feature of a reflex arc?

Which statement is true regarding neurotransmitters?

What is the primary function of voltage-gated channels in neurons?

What does continuous conduction refer to?

What happens immediately after sodium ions rush into the neuron?

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