Nervous System Pre-Test

Front

What is the correct sequence of events during an action potential?

Back

1. Resting potential 2. Depolarization 3. Repolarization 4. Hyperpolarization

Front

What is the name of the gap between two neurons where neurotransmitters are released?

Back

Synaptic cleft

Front

Which part of the nervous system is responsible for transmitting sensory and motor information between the brain and the body?

Back

Peripheral Nervous System (PNS)

Front

Which neurotransmitter is most commonly associated with mood regulation and quality of sleep?

Back

Serotonin

Front

What is the primary function of the myelin sheath?

Back

To speed up the transmission of electrical signals

Front

What is the resting potential of a neuron?

Back

Approximately -70 mV.

Front

What occurs during depolarization in an action potential?

Back

Sodium channels open, allowing Na+ ions to flow into the neuron, making the inside more positive.

Front

What is the role of neurotransmitters in the nervous system?

Back

To transmit signals across the synaptic cleft from one neuron to another.

Front

What is the difference between the central nervous system (CNS) and the peripheral nervous system (PNS)?

Back

CNS consists of the brain and spinal cord; PNS includes all other neural elements.

Front

What is hyperpolarization and when does it occur?

Back

Hyperpolarization occurs when the membrane potential becomes more negative than the resting potential, often after repolarization.