Chapter 11 Nervous System And Tissues Flashcards
Peripheral nervous system
Made up of nerves
Central nervous system
Made up of the brain and spinal cord
The brain is composed primarily of __?
Nervous tissue
The brain consist of how many cells ?
100 billion neurons
Nerves
Carry signals to and from the central nervous system
__ are packed together with blood vessels and surrounded by connective tissue sheaths.
Axons
There are how many cranial nerves?
12 pairs
There are how many pairs of spinal nerves
31 pairs
Sensory functions
Involve gathering info about the internal and external enviroments of the body
Integrative functions
Analyze and interpret incoming sensory info and determine an appropriate response.
Motor functions
Actions performed in response to integration
Somatic sensory division
Consist of neurons that carry signals from skeletal muscles, bones, joints, and skin.
As well as neurons that transmit signals from organs of vision, hearing, taste, smell, and balance.
What functional division is sometimes reffered to as “special sensory division”
Somatic sensory division
Visceral sensory division
Consist of neurons that transmit signals from viscera (organs) such as the heart, lungs, bladder, stomach, intestines, kidneys.
