Download Document

Anatomy & Physiology I
Nervous System
1. Outline the major Divisions of the Nervous system by filling out the chart on the
last page of this lab:.
2. Define briefly:
a) tracts -
b) nerves
3. What are neuroglia cells? List and briefly describe the 4 in the CNS & describe
them.
a) __________________________-
b) __________________________-
c) __________________________-
d) __________________________-
4. List and briefly describe the neuroglia cells found in the PNS.
a) __________________________-
b) __________________________-
5. What is myelin sheath and where is it located?
6. Define briefly these parts of a neuron. Label these parts on the following diagram.
a) cytoplasmb) axon hillockc) initial segmentd) nucleus of schwann celle) node of Ranvierf) synaptic end bulbg) dendrites-
7. Fill in the blanks (parts of a neuron continued):
The transfer of information between neurons is called a ___________________.
Most synapses occur between the __________________ ______________________ of
one neuron and the ________________________ of another. The fluid-filled space
approximately 1 millionth of an inch wide between 2 neurons is called ______________
________________. Neurotransmitters are present in ___________________
__________________ and act to open or close ________ ________________ that
influence membrane permeability.
8.
a. What are neurotransmitters?
b.
Give 3 examples of neurotransmitters.
c.
Where are neurotransmittors active (where do they work related to the neuron)?
9. How do neurotransmitters get “recycled”? Why is this important?
10. What enzymes are involved in neurotransmitter recycling?
Autonomic Nervous System
FOCUS: Comparison of the Sympathetic and Parasympathetic Nervous
Systems
ANATOMICAL differences
Sympathetic
Parasympathetic
Origin
Length of motor neurons
Location of ganglion
Neurotransmitter released
FUNCTIONAL differences
Structure
Pupils
Heart
Blood vessels
Bronchioles
Intestinal sphincters
GI motility/secretions
Urinary bladder
Urethral sphincter
Adrenal medulla
Liver
Sweat glands
Salivary glands
Lacrimal glands
Sympathetic
Parasympathetic
Label the major Divisions of the Nervous System