2024 Nervous System Test

Front

What is a Dendrite?

Back

A dendrite is a part of a neuron that receives signals from other neurons and transmits them to the cell body.

Front

What ions are primarily involved in generating an electrical nerve impulse?

Back

Potassium and Sodium ions are primarily involved in generating an electrical nerve impulse.

Front

What does -70 mV represent in a neuron?

Back

-70 mV represents the Resting Potential of a neuron.

Front

What is the function of the sodium-potassium pump?

Back

The sodium-potassium pump maintains the resting membrane potential by pumping sodium ions out and potassium ions into the neuron, against their concentration gradients.

Front

What is Acetylcholine and its primary functions?

Back

Acetylcholine is a neurotransmitter involved in muscle movement, memory, and learning.

Front

Define Resting Potential.

Back

Resting Potential is the electrical charge difference across the neuronal membrane when the neuron is not actively transmitting a signal.

Front

What is Action Potential?

Back

Action Potential is a rapid change in the membrane potential of a neuron that occurs when it is stimulated, leading to the transmission of a nerve impulse.

Front

Explain the role of neurotransmitters in the nervous system.

Back

Neurotransmitters are chemical messengers that transmit signals across synapses from one neuron to another, influencing various functions such as mood, movement, and cognition.

Front

What is the significance of the myelin sheath?

Back

The myelin sheath is a fatty layer that insulates axons, increasing the speed of electrical impulses along the neuron.

Front

What is the difference between excitatory and inhibitory neurotransmitters?

Back

Excitatory neurotransmitters increase the likelihood of a neuron firing an action potential, while inhibitory neurotransmitters decrease that likelihood.