Neural Signalling Quiz

How are electrical signals generated and moved within neurons?

• Through chemical reactions in the synapse

• By the movement of ions across the neuron membrane

• Via the release of neurotransmitters

• Through the contraction of muscle fibers

How can neurons interact with other cells?

• By releasing hormones into the bloodstream

• Through direct physical contact

• By releasing chemicals into synapses

• By absorbing nutrients from other cells

What is the role of neurons within the nervous system?

• To carry electrical impulses

• To produce hormones

• To digest food

• To transport oxygen

How is the resting potential generated in neurons?

• By diffusion of water molecules

• By pumping sodium and potassium ions

• By absorbing glucose

• By releasing carbon dioxide

What are nerve impulses propagated as along nerve fibers?

• Chemical signals

• Magnetic fields

• Action potentials

• Sound waves

What causes variation in the speed of nerve impulses?

• Temperature changes

• Variation in nerve fiber diameter

• Changes in blood pressure

• Differences in skin color

What is the role of synapses in neural signalling?

• They act as barriers between neurons.

• They serve as junctions between neurons and between neurons and effector cells.

• They generate electrical impulses in neurons.

• They store neurotransmitters for later use.

Where are neurotransmitters released from in the process of neural signalling?

• Postsynaptic membrane

• Axon hillock

• Presynaptic membrane

• Dendritic spine

What is generated as a result of excitatory postsynaptic potential?

• Inhibitory signal

• Action potential

• Resting potential

• Synaptic delay

What is the basic unit of the nervous system?

• Neuron

• Nerve Fiber

• Dendrite

• Axon