The diagram in Fig. 1 shows a neurone used in a laboratory model of how information passes from a fingertip to the spinal cord. (a) Name the part labelled X...
Question 1 Report
The diagram in Fig. 1 shows a neurone used in a laboratory model of how information passes from a fingertip to the spinal cord.
(a) Name the part labelled X. [1]
(b) Describe the direction in which a nerve impulse travels through the neurone. [2]
(c) Explain one advantage of myelin around the axon labelled Y. [1]
(d) Which chemical carries information across the gap labelled Z? [2]
Answer Details
(a) X = dendrite [1] (b) From dendrites / receptor end [1], along the axon to terminal buttons / synapse [1]. (c) Myelin insulates the axon and increases the speed of impulse transmission [1]. (d) Neurotransmitter [1], for example acetylcholine / dopamine / serotonin [1].
Download The App On Google Playstore
Everything you need to excel in your exams
