IGCSE Biology - Coordination and response (14.1)

Cambridge IGCSE Biology (0610/0970)
Chapter 14 - Coordination and response
Topic 14.1 - Coordination and response
For exams in 2023, 2024 & 2025 (core and extended)

As always this video follows the Cambridge syllabus exactly and contains absolutely everything you need to know for your final exam!

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@igpecomplete - Cambridge IGCSE PE
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Timestamps:
0:00 Contents
0:31 Role of the nervous system
1:37 CNS and PNS
1:56 Sensory, relay and motor neurones
2:41 Reflex action
3:16 Simple reflex arc
4:01 Synapses (extended)

Core content:
- State that electrical impulses travel along neurones
- Describe the mammalian nervous system in terms of:
(a) the central nervous system (CNS) consisting of the brain and the spinal cord
(b) the peripheral nervous system (PNS) consisting of the nerves outside of the brain and spinal cord
- Describe the role of the nervous system as coordination and regulation of body functions
- Identify in diagrams and images sensory, relay and motor neurones
- Describe a simple reflex arc in terms of: receptor, sensory neurone, relay neurone, motor neurone and effector
- Describe a reflex action as a means of automatically and rapidly integrating and coordinating stimuli with the responses of effectors (muscles and glands)
- Describe a synapse as a junction between two neurones

Extended content:
- Describe the structure of a synapse, including the presence of vesicles containing neurotransmitter molecules, the synaptic gap and receptor proteins
- Describe the events at a synapse as:
(a) an impulse stimulates the release of neurotransmitter molecules from vesicles into the synaptic gap
(b) the neurotransmitter molecules diffuse across the gap
(c) neurotransmitter molecules bind with receptor proteins on the next neurone
(d) an impulse is then stimulated in the next neurone
- State that synapses ensure that impulses travel in one direction only

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[fatimasaid-ni]

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