Access over 20 million homework & study documents

436552273 anaphy

Content type
User Generated
Rating
Showing Page:
1/8
ANAPHY REVIEWER
NERVOUS SYSTEM
Master control and communication system of the body
Communicates with body cells using electrical impulses which
are rapid and specific and cause almost immediate responses
FUNCTION OF THE NERVOUS SYSTEM
1. Sensory Input
Gathering information
To monitor changes occurring inside and outside the body
Changes: stimuli
Sensory organs
2. Integration
To process and interpret sensory input and decide whether
action is needed
Occurs in the CNS (brain)
3. Motor Output
A response to integrated stimuli
Activates muscles or glands (effectors)
ORGANIZATION OF THE NERVOUS SYSTEM
NERVOUS SYSTEM BASED ON STRUCTURAL
CLASSIFICATION
1. Central Nervous System
a) Organs
Brain and spinal cord
b) Functions
Integration; command center
Interpret incoming sensory information
Issue instructions based on past experience and current
conditions
2. Peripheral Nervous System
a) Nerves extending from the brain and spinal cord
Spinal nerves: carry impulses to and from the spinal cord
Cranial nerves: carry impulses to and from the brain
b) Functions
These nerves serve as communication lines among sensory
organs, the brain and spinal cord, and glands/muscles
Link all parts of the body by carting impulses from the
sensory receptors to the CNS and from the CNS to the
appropriate glands or muscles
NERVOUS SYSTEM BASED ON FUNCTIONAL
CLASSIFICATION
1. Sensory (Afferent) Division
Afferent: towards the CNS
Consists of nerves (composed of many individual nerve fibers)
that convey impulses to the CNS from sensory receptors located
in various parts of t