Nervous System III
Terms in this set (18)
The spinal cord is a neural tissue that continues from the ... at the base of the brain and extends about ... to just below the last ...
medulla, 45cm, rib
What is in the central canal of the spinal cord?
Ascending tracks carry ... information ... the brain
Descending tracks carry ... information ... the brain to a nerve leaving the spinal cord
What three neurons are involved in a reflex arc?
1. sensory neuron
2. motor neuron
The grey matter of the spinal cord houses the ... of the motor neurons involved in reflexes
interneurons and the cell bodies
The PNS is divided into two systems
somatic nervous system and autonomic nervous system
Somatic Nervous System
carries sensory information from the skin, muscles, joints, etc, to the CNS and directs voluntary movement
Autonomic Nervous System
regulates involuntary movements such as heart rate, breathing, etc
The autonomic system is divided into
sympathetic and parasympathetic
body during restful conditions
body during stressful or emergency situations
The body has ... pairs of spinal nerves
The resulting bundle of sensory nerves enter the ... of the spinal cord
The axons of the motor neurons leave the ... of the spinal cord. This is called the ... root
ventral (front side), vertebral
Where are the cell bodies of the motor neurons located?
in the grey matter of the spinal cord
There are ... pairs of cranial nerves that arise from the brain
Events that occur in the sympathetic system during an emergency
increased heart rate
increased breathing rate
increased blood pressure
increased glucose amount
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