Red
Two main divisions of the Nervous System
CNS & PNS
the processes that carry impulses away from the neuron cell bodies
Axon
afferent neurons
carry impulses to the spinal cord and brain from all parts of the body
Sensory neurons
Afferent Neurons
Cell Type: do not specialize in transmitting impulses
Glia Cells
autonomic nervous system is a subdivision of
PNS
conduct impulses from sensory neurons to motor neurons
Interneurons
carry impulses away from the brain and spinal cord
Motor Neuron
one of the most common types of brain tumor
glioma ( of glia cells)
astrocytes
threadlike branches attach to neurons and to small blood vessels, holding these structures close to each other.
Each neuron consists of three parts
a main part called the neuron cell body, branching projections called dendrites, and one elongated projection known as an axon.
function of the hypothalamus
Produces antidiuretic hormone.
Helps regulate body temperature.
Helps regulate water balance.
connecting neurons
Interneurons
How many Cranial Nerves?
12
Parts of brainstem
A. Medulla oblongata
B. Pons
C. Midbrain
processes or projections that carry impulses to the neuron cell bodies
Dendrites
Cerebrospinal fluid is found between the
Option 3
arachnoid mater and the pia mater.
What kind of muscles to the Somatic Nervous System effect?
Skeletal Muscles ( Remember Voluntary Movement)
The most basic reflex arc is
a two-neuron pathway.
A reflex arc:
2 way has?
3 way Has?
2 way: Sensory and Motor
3 Way Sensory, Inter and Motor
Remember: Not all Reflex Arcs have Interneurons
Conduct Nerve impulse to only to two kinds of tissue—muscle and glandular epithelial tissue
Motor / Efferent Neuron
T/F : During a nerve impulse K+ channels open and flow in the cell.
False
Ans: sodium ions are allowed into the neuron.
Forms the blood-brain barrier (BBB)
Astrocytes
a single-neuron pathway to connect the spinal cord to the effector organ.
Somatic
Eyes CNS/PNS?
PNS