The structure of the human nervous system
CNS: brain & spinal column PNS: somatic & autonomic (parasympathetic & sympathetic) Fight-flight response
Terms in this set (11)
Central Nervous System (CNS)
the brain and the spinal cord
when an experimental variable is stated in terms of how it will be observed, manipulated and measured.
Peripheral Nervous System (PNS)
all parts of the nervous system that lie outside the central nervous system (CNS); links the CNS to all other parts of the body.
Parasympathetic Nervous system
a division of the autonomic nervous system that keeps the systems of the body functioning efficiently and also restores the body to a state of calm by reversing the direction of the bodily changes activated by the sympathetic nervous system
Somatic nervous system
one of two sub-divisions of the peripheral nervous system that carries sensory information to the central nervous system and motor information from the central nervous system to the body
a part of the central nervous system that connects the brain to other parts of the body through the peripheral nervous system
a nerve cell that detects and sends messages from sense organs and sense receptor sites to higher brain centres via the spinal cord
a specialised neuron that carries messages away from the central nervous system towards the muscles, organs and glands, thereby enabling bodily movements, and activating internal organs and glandular secretions.
a neuron that transmits information within the CNS and interconnects messages from sensory and motor neurons.
Sympathetic nervous system
division of the autonomic nervous system that activates nerves, glands and visceral muscles (blood vessel, heart & intestines) in times of stress or threat
an involuntary reaction resulting in a state of physiological readiness to deal with a sudden and immediate threat by either confronting it (fight) or running away to safety (flight).