5.2 The human nervous system

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Question 7
Easy
a.

Complete the sequence of neurones that transmit electrical impulses in a reflex arc. Choose your answers from the box below:

  • motor neurone
  • relay neurone
  • sensory neurone

receptor→_______________→_______________→_______________→effector\text{receptor} \rightarrow \text{\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_} \rightarrow \text{\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_} \rightarrow \text{\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_} \rightarrow \text{effector}receptor→_______________→_______________→_______________→effector

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b.

State two key characteristics of a reflex action.

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c.

Diagram of a sagittal section of the human brain. The outer highly folded region at the top is label X. A small bulbous gland at the lower-middle-front of the brain is labeled Y. The brainstem region below the cerebrum is labeled Z. The detailed, leaf-patterned structure at the lower-back of the brain is labeled Cerebellum.

  1. Which letter represents the medulla, which coordinates automatic functions like breathing and heartbeat?
  2. What is the main function of the region labeled X (the cerebral cortex)? Select one of the following:
    • Controlling balance and muscle coordination
    • Conscious processes such as intelligence, memory, and language
    • Releasing hormones to target organs
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5.2 The human nervous system Questions

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