Lab 8 The Nervous System BIO201L
Student Name:
Access Code (located on the lid of your lab kit): AC-54NRLKM
Pre-Lab Questions:
1. What is the primary function of the nervous system?
The primary function of the nervous nervous is to collect and create sensory signals from out-
side environments and interior input from our body.
2. Why does the cerebral cortex contain so many folds?
Cerebral cortex contain so many folds because it helps expand the surface area.
3. What is a nerve impulse?
A nerve impulse is signal sent from the axon terminal down nerve fibers. Made of a wave of
electrical depolarization that back up potential difference across nerve cell membrane.
4. What are Schwann cells and what do they form?
Schwann cells and gill cells that keep peripheral nerve fibers alive. Glial cells are cells that help
neurons by providing them safe boundary and keep them insulated. These cells form the
myelin sheath.
5. What is an all-or-none response?
Everything or nothing responses explain about them that as response power to nerve cell or
fiber has no toleration to the strength of the stimulus. Nerve cell and muscle fiber to respond it
has to be top of certain threshold.
6. What two effects might neurotransmitters have?
They can excite or less nerve cells. Example of these neurotransmitters are acetylcholine and
norepinephrine.
Experiment 1: Microscopic Anatomy of the Nervous System
Post-Lab Questions
1. Label the arrows in the slide images below based on your observations from the experiment.
A- Axon.
B- Cell bodies.
C-Myelinated axons.
D- myelin sheaths.
, Lab 8 The Nervous System BIO201L
Student Name:
Access Code (located on the lid of your lab kit): AC-54NRLKM
Pre-Lab Questions:
1. What is the primary function of the nervous system?
The primary function of the nervous nervous is to collect and create sensory signals from out-
side environments and interior input from our body.
2. Why does the cerebral cortex contain so many folds?
Cerebral cortex contain so many folds because it helps expand the surface area.
3. What is a nerve impulse?
A nerve impulse is signal sent from the axon terminal down nerve fibers. Made of a wave of
electrical depolarization that back up potential difference across nerve cell membrane.
4. What are Schwann cells and what do they form?
Schwann cells and gill cells that keep peripheral nerve fibers alive. Glial cells are cells that help
neurons by providing them safe boundary and keep them insulated. These cells form the
myelin sheath.
5. What is an all-or-none response?
Everything or nothing responses explain about them that as response power to nerve cell or
fiber has no toleration to the strength of the stimulus. Nerve cell and muscle fiber to respond it
has to be top of certain threshold.
6. What two effects might neurotransmitters have?
They can excite or less nerve cells. Example of these neurotransmitters are acetylcholine and
norepinephrine.
Experiment 1: Microscopic Anatomy of the Nervous System
Post-Lab Questions
1. Label the arrows in the slide images below based on your observations from the experiment.
A- Axon.
B- Cell bodies.
C-Myelinated axons.
D- myelin sheaths.
, Lab 8 The Nervous System BIO201L
