Understanding Neurons and Their Functions

What type of neuron is responsible for transmitting signals from sensory receptors to the central nervous system?

• Motor neuron

• Sensory neuron

• Relay neuron

• Interneuron

What is the primary function of the myelin sheath?

• To store neurotransmitters

• To insulate the axon and speed up signal transmission

• To connect neurons to each other

• To generate action potentials

What is the term for the gap between two neurons where synaptic transmission occurs?

• Axon terminal

• Synapse

• Node of Ranvier

• Dendrite

Which of the following best describes an action potential?

• A resting state of a neuron

• A rapid rise and fall in voltage across a neuron's membrane

• A slow, steady increase in voltage

• A decrease in neurotransmitter release

What is the term for the minimum level of stimulus required to trigger an action potential?

• Summation

• Threshold

• Excitation

• Inhibition

Which process involves the combination of multiple synaptic inputs (sum total) to reach the threshold for an action potential?

• Inhibition

• Excitation

• Summation

• Transmission

What is the role of relay neurons?

• To transmit signals from the central nervous system to muscles

• To connect sensory and motor neurons within the central nervous system

• To detect changes in the environment

• To produce myelin

Which of the following describes excitation in neural communication?

• Decreasing the likelihood of an action potential

• Increasing the likelihood of an action potential

• Blocking neurotransmitter release

• Slowing down synaptic transmission

What is the function of the nodes of Ranvier?

• To store neurotransmitters

• To facilitate rapid conduction of nerve impulses

• To connect neurons to each other

• To generate action potentials

Which type of neuron is primarily involved in muscle contraction?

• Sensory neuron

• Relay neuron

• Motor neuron

• Interneuron