Recap - How much do I remember from Nerve I?

Which of the following is a correct pairing of zone-function of a neuron?

• Conducting zone - Dendrites

• Input zone - Axon terminal

• Output zone - Receptors

• Trigger zone - Axon hillock

Which of the following is an example of primary active transport?

• K⁺ leak channels on neuronal membrane

• Na⁺-glucose co-transporter on intestinal membrane

• Na⁺-K⁺ ATPase on neuronal membrane

• Aquaporin channels on kidney tubules

A motor neuron is usually a

• Unipolar neuron

• Bipolar neuron

• Multipolar neuron

• Pseudopolar neuron

An aggregation of neuron cell bodies in the peripheral nervous system is called

• A nerve

• A nerve fibre

• A ganglion

• A satellite

Which of the following glial cells is responsible for the formation of myelin sheath in neuron within the CNS?

• Astrocytes

• Ependymal cells

• Oligodendrocytes

• Schwann cells

Which of the following correctly represents the relative ionic concentration in the ICF vs ECF?

• ICF [Cl^-] < ECF [Cl^-]

• ICF [K⁺] < ECF [K⁺]

• ICF [Mg²⁺] < ECF [Mg²⁺]

• ICF [Na⁺] > ECF [Na⁺]

Which of the following determines the membrane potential?

• Difference between the electrolyte concentration of ECF and ICF

• High [K⁺] outside the cell

• High [Ca²⁺] within the cell

• Unequal distribution of (+) and (-) charges across membrane

Which of the following is the main factor generating the resting membrane potential of a neuron?

• Presence of more K⁺ leak channels

• Na⁺-K⁺ ATPase pumping out more Na⁺

• Presence of more voltage-gated Na⁺ channels

• Presence of negatively-charged proteins in ICF

Which of the following is the most common ionic basis of a hyperpolarising graded potential?

• Influx of K⁺

• Influx of Na⁺

• Influx of Cl^-

• Efflux of Ca²⁺

State an example of a graded potential.