Neurones and Action Potential

Which of the following is NOT a type of neurone?

• Sensory neurone

• Motor neurone

• Interneurone

• Glial neurone

What is the primary function of sensory neurones?

• Transmit signals from the brain to muscles

• Transmit signals from sensory receptors to the central nervous system

• Connect neurones within the central nervous system

• Support and protect neurones

What is the typical resting membrane potential of a neurone?

• 0 mV

• -70 mV

• +30 mV

• -90 mV

Put the stages of an action potential in order

• Repolarisation

• Hyperpolarisation

• Resting Potential

• Depolarisation

• Stimulus

Which of these statements about the protein pump is correct?

• 3 Potassium ions in for every 2 Sodium ions out

• 3 Sodium ions out for every 2 Potassium ions in

• 3 Sodium ions in for every 2 Potassium ions out

• 3 Sodium ions out for every 2 Potassium ions out

During an action potential, what causes the depolarisation phase?

• Influx of potassium ions

• Efflux of sodium ions

• Influx of sodium ions

• Efflux of calcium ions

What is the role of the myelin sheath in neurones?

• To slow down the transmission of nerve impulses

• To protect the neurone from damage

• To speed up the transmission of nerve impulses

• To store neurotransmitters

What is the main function of motor neurones?

• To transmit sensory information to the brain

• To connect sensory and motor pathways

• To transmit signals from the central nervous system to muscles

• To process information within the brain

Which of the following ions is primarily involved in the repolarisation phase of an action potential?

What is the typical voltage of the threshold?

• -55mV

• -60mV

• +55mV

• +60mV