Consists of central nervous system and the peripheral nervous system.
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Central nervous system
Consists of the brain and the spinal cord and its origin of all complex commands and decisions.
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Peripheral nervous system
Sends info to the central nervous system (CNS) from the outside world, and transmits messages from the CNS to muscles and glands in the body.
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Somatic nervous system
Transmits info from receptor cells in the sense organs to the central nervous system (CNS). It also receives info from the CNS that directs muscles to act.
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Autonomic nervous system
Transmits info to and from internal bodily organs. (automatic) It has two main divisions: the sympathetic and parasympathetic nervous systems.
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Parasympathetic nervous system
It controls the relaxed state (rest and digest), conserving digestion and metabolism.
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Sympathetic nervous system
It activates internal organs for vigorous activities and emergencies, such as the fight or flight response. It consists of nerves that control increased heart rate and breathing and decreased digestive activity.
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Endocrine system
One of the body's major information systems that instructs glands to release hormones directly into the bloodstream. These hormones are carried towards target organs in the body.
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Gland
An organ in the body that synthesises substances such as hormones.
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Hormones
Chemical substances that circulate in the bloodstream and only affect target organs. They are produced in large quantities but disappear quickly. Their effects are vert powerful.
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Fight or Flight response
The way in animals respond when stressed. The body becomes physiologically aroused in readiness to fight an aggressor or, in some cases, flee.
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Adrenaline
A hormone produced by the adrenal glands, part of the immediate stress response system. Adrenaline has a strong effect on stimulating the heart rate, contracting blood vessels and dilating air passages.
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Other cards in this set
Card 2
Front
Consists of the brain and the spinal cord and its origin of all complex commands and decisions.
Back
Central nervous system
Card 3
Front
Sends info to the central nervous system (CNS) from the outside world, and transmits messages from the CNS to muscles and glands in the body.
Back
Card 4
Front
Transmits info from receptor cells in the sense organs to the central nervous system (CNS). It also receives info from the CNS that directs muscles to act.
Back
Card 5
Front
Transmits info to and from internal bodily organs. (automatic) It has two main divisions: the sympathetic and parasympathetic nervous systems.
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