Nervous System Term 5 Session 4

What is the name given to neurons with receptors at their peripheral endings which continuously inform the CNS of the conditions within the external or internal environment?

• Afferent

• Efferent

Which neurons have receptors which rapidly adapt so that the action potential frequency in the afferent nerve decreases during a maintained stimulus?

• Tonic

• Phasic

Which of the following somatosensory pathway is involved in carrying the senses of fine touch?

• Dorsal columns

• Anterolateral spinothalamic tracts

• Spinocerebellar tracts

Which of the following accurately describes 'lateral inhibition'?

• The capacity of an excited neuron to reduce the activity of its neighbors.

• The ability of the brain to focus on just one visual point

Which of the following is correct in relation to the homunculus?

• The amount of cortex dedicated to a body area is proportional to its size

• The hand and fingers take up more cortex than the foot and toes