Page 8 - SELF-PACED LEARNING MODULES

Reflex Arc Stimulus. Any
The simplest type of change in the
nervous response which environment
is unconscious and
voluntary Receptor.-
Structures that pick
up the stimuli

Effector.- Respnding
organs
Purpose of a reflex A reflex is sequence Withdrawal reflex
of actions designed Pupillary reflex
to sense a change Baroreceptor reflex
and to respond to the
change in a way to Gag reflex
restore homeostasis. Corneal reflex

Spinal Cord The thickness of
Acts as a relay for all your thumb, 17
sensory information Inches long. It
traveling to the brain. The extends from the
SC acts as a relay for all base of the brain
motor information coming (medulla oblongata)
from the brain. The SC acts
as a major reflex center to L1

Central canal The hole in the center of
the spinal cord. Connects
with the ventricles and
the subarachnoid space
Gray matter Is composed of cell
bodies and
unmyelinated
interneurons. Butterfly
shape
White matter Is composed of
ascending (sensory)
and descending
(motor) tracts