Neurone and Nerve Impulse Transmission Worksheet

What is the primary function of dendrites in a neurone?

• To transmit signals away from the cell body

• To receive signals and conduct them to the cell body

• To store neurotransmitters

• To produce the myelin sheath

What is the name of the fatty covering around an axon?

• Axon terminal

• Synaptic cleft

• Myelin sheath

• Node of Ranvier

Which structure in a neurone speeds up the transmission of impulses?

• Dendrites

• Nodes of Ranvier

• Cell body

• Synapse

What is the role of the synapse in nerve impulse transmission?

• To store calcium ions

• To insulate the axon

• To transmit signals across a gap between neurones

• To generate action potentials

What type of ions are responsible for nerve impulse transmission?

• Sodium and potassium

• Calcium and magnesium

• Chloride and bicarbonate

• Hydrogen and oxygen

What is the term used for the electrical signals conducted by neurones?

• Synaptic potentials

• Action potentials

• Resting potentials

• Excitatory inputs

Where are neurotransmitters stored before their release?

• In the nucleus

• In axon terminals

• In synaptic vesicles

What triggers the release of neurotransmitters into the synaptic cleft?

• Arrival of an action potential

• Closing of ion channels

• Increase in sodium ion concentration

• Inhibition of the post-synaptic membrane

What happens when neurotransmitters bind to receptors on the post-synaptic membrane?

• Vesicles are formed

• Ion channels may open or close

• Potassium ions are released

• The myelin sheath is repaired

What is the term for the gap between two neurones?

• Axon terminal

• Synaptic cleft

• Node of Ranvier

• Dendritic gap