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24 Cards in this Set
- Front
- Back
AUTONOMIC NERVOUS SYSTEM |
The system controlling involuntary actions such as the heartbeat. |
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AXON |
A nerve fibre that sends nerve impulses away from the cell body. |
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BRAIN STEM |
Part of the brain where the spinal cord enters the skull; it controls the body's vital functions, such as breathing, blood pressure and heart rate. |
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CELL BODY |
The part of the neurone that contains the nucleus. |
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CENTRAL NERVOUS SYSTEM (CNS)
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The brain and the spinal cord |
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CEREBELLUM |
Part of the brain that is responsible for coordination and balance. |
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CEREBRUM |
Part of the brain that controls conscious thoughts, controls the movement of every body part, and receives sensory messages from each body part. |
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DENDRITES |
Branches from the cell body that receive messages from other neurones. |
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EFFECTORS |
Muscles or glands that put the messages into effect |
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MEDULLA |
The lower half of the brain stem. |
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MOTOR NEURONES |
Nerve cells that carry messages from the CNS to effectors. |
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MYELIN SHEATHS |
The insulating layer that covers a neurone |
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NERVE IMPULSE |
The electrical message carried by a nerve cell |
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NEURONE |
A nerve cell |
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NEUROTRANSMITTER |
A chemical message carried by a nerve cell |
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OPTIC NERVE |
The nerve that carries messages to the brain from the retina at the back of the eye |
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PARASYMPATHETIC NERVOUS SYSTEM |
Part of the nervous system that slows the body down and controls it when it is resting |
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PERIPHERAL NERVOUS SYSTEM (PNS) |
The nerves that carry messages to and from the central nervous system and other parts of the body. |
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RECEPTORS |
Special cells that detect stimuli |
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REFLEX ACTIONS |
Quick, automatic actions that protect the body from danger; they are also known as reflexes. |
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REFLEX ARC |
The nerve pathway operating in reflex action.
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SENSORY NEURONES |
Nerve cells that carry messages from cells in the sense organs to the CNS. |
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SOMATIC NERVOUS SYSTEM |
Part of the nervous system that coordinates the movement of the body and receives information from the sensory organs. |
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STIMULUS |
Any factor that stimulates a receptor and brings about a response. |