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CAIE IGCSE Biology 14.1 Nervous Coordination & Response

Practise tracing electrical impulses through nervous pathways, identifying neurones, sequencing reflex arcs and explaining synapses.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • distinguish CNS and PNS components from brain, spinal cord and peripheral nerve evidence
  • sequence receptor, sensory, relay and motor neurones before muscle or gland effectors
  • explain synaptic transmission by vesicle release, diffusion, receptor binding and direction

Covered syllabus points

14.1.1—Electrical impulses travel along14.1.2—Mammalian nervous system14.1.3—Role of the nervous system14.1.4—Sensory, relay and motor neurones14.1.5—Simple reflex arc in terms14.1.6—Reflex action as a means14.1.7—Synapse as a junction between two14.1.8—Structure of a synapse14.1.9—Events at a synapse14.1.10—Synapses ensure that impulses travel

14.1 Coordination and response question 1

[Maximum number: 1]

Heart rate is influenced by electrical impulses from the brain.

State the name of the type of cell that conducts electrical impulses to the heart.

14.1 Coordination and response question 2

[Maximum number: 2]

The eye is a sense organ that is part of the nervous system.

State the two parts of the central nervous system.

1
2

14.1 Coordination and response question 3

[Maximum number: 9]

Question (a)

(a)
Fig. 3.1 shows the reflex arc involved in a simple reflex action.

Fig. 3.1 shows the reflex arc involved in a simple reflex action.

On Fig. 3.1 use label lines to identify and name the three types of neurone shown.

[ 3 ]

Question (b)

(b)

A reflex is an involuntary action.

Explain what is meant by the term involuntary action.

[ 2 ]

Question (c)

(c)

Define the term synapse.

[ 1 ]

Question (d)

(d)

Describe how impulses are transmitted across a synapse.

[ 3 ]
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