Nervous System Functions and Neurons

The video explains the structure and function of neurons in the nervous system, focusing on how neurons transmit signals. It covers the types of neurons: sensory, interneurons, and motor neurons, and details the process of signal transmission through action potentials. The video also discusses the role of synapses and neurotransmitters in facilitating communication between neurons.

What is the primary function of the nervous system?

• To control thoughts and movements

• To digest food

• To store energy

• To circulate blood

Which part of the neuron receives signals from neighboring neurons?

• Axon

• Cell body

• Dendrites

• Synapse

What type of neuron is responsible for detecting stimuli?

• All of the above

• Sensory neurons

• Interneurons

• Motor neurons

How do motor neurons respond to impulses?

• By creating new impulses

• By contracting and stretching muscles

• By detecting stimuli

• By sending signals to the brain

What is an action potential compared to in the video?

• A beating heart

• A spinning wheel

• A flowing river

• A wave at a sporting event

What happens when sodium channels open during an action potential?

• The neuron shrinks

• The neuron stops functioning

• The charge becomes positive

• The charge becomes negative

What is the role of the sodium-potassium pump?

• To transmit signals across synapses

• To generate impulses

• To create neurotransmitters

• To restore resting potential

How do neurotransmitters assist in signal transmission?

• By blocking impulses

• By diffusing across synapses

• By creating electrical charges

• By destroying synapses

What triggers the opening of sodium channels in a new neuron?

• The closure of synapses

• The release of ATP

• The capture of neurotransmitters

• The presence of potassium

What happens to the charge of a neuron when potassium exits?

• It becomes more positive

• It becomes more negative

• It remains unchanged

• It becomes neutral