2025 COMPLETE SOLUTION FOR BIO 201L Lab 8 The Nervous
System Straighterline
Student Name:
Access Code (located on the lid of your lab kit):
Lab Report Format Expectations
Utilize college level grammar and professional formatting when completing this
worksheet. Submissions without proper formatting, all required photos or
sufficient responses will be rejected.
Pre-lab Questions
1. What is the primary function of the nervous system?
The main role of the nervous system is to collect and interpret sensory
information from both the external environment and internal signals from
our body.
2. Why does the cerebral cortex contain so
many folds? These folds help to expand the
surface area.
3. What is a nerve impulse?
A nerve impulse is a signal that travels from the axon terminal along nerve
fibers, characterized by a wave of electrical depolarization that alters the
potential difference across the membranes of nerve cells.
4. What are Schwann cells and what do they form?
Schwann cells are a type of glial cell that maintain the health of peripheral
nerve fibers. They support neurons by enveloping them and providing
insulation, forming the myelin sheath.
5. What is an all-or-none response?
The all-or-none response indicates that the strength of the response from a
, nerve cell or fiber does not vary with the strength of the stimulus. A
response occurs only if the
stimulus exceeds a certain threshold.
6. What two effects might neurotransmitters have?
Neurotransmitters can either stimulate or inhibit nerve cells. Examples
include acetylcholine and norepinephrine.
, Lab 8 The Nervous System BIO201L
EXPERIMENT 1: MICROSCOPIC ANATOMY OF NERVOUS SYSTEM
Introduction Questions
1. What is the major function of the neuron?
They are responsible for processing and relaying information throughout
the body.
2. Define depolarization.
The variation in electrical charge between the interior and exterior of the
plasma
membrane (in nerve or muscle cells) occurs due to changes in permeability
and the movement of sodium ions inward.
3. What determines whether a neuron is unipolar, bipolar, or multipolar?
The classification of a neuron as unipolar, bipolar, or multipolar is based
on the volume of signals being processed from the cell body.
Data and Observations
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
System Straighterline
Student Name:
Access Code (located on the lid of your lab kit):
Lab Report Format Expectations
Utilize college level grammar and professional formatting when completing this
worksheet. Submissions without proper formatting, all required photos or
sufficient responses will be rejected.
Pre-lab Questions
1. What is the primary function of the nervous system?
The main role of the nervous system is to collect and interpret sensory
information from both the external environment and internal signals from
our body.
2. Why does the cerebral cortex contain so
many folds? These folds help to expand the
surface area.
3. What is a nerve impulse?
A nerve impulse is a signal that travels from the axon terminal along nerve
fibers, characterized by a wave of electrical depolarization that alters the
potential difference across the membranes of nerve cells.
4. What are Schwann cells and what do they form?
Schwann cells are a type of glial cell that maintain the health of peripheral
nerve fibers. They support neurons by enveloping them and providing
insulation, forming the myelin sheath.
5. What is an all-or-none response?
The all-or-none response indicates that the strength of the response from a
, nerve cell or fiber does not vary with the strength of the stimulus. A
response occurs only if the
stimulus exceeds a certain threshold.
6. What two effects might neurotransmitters have?
Neurotransmitters can either stimulate or inhibit nerve cells. Examples
include acetylcholine and norepinephrine.
, Lab 8 The Nervous System BIO201L
EXPERIMENT 1: MICROSCOPIC ANATOMY OF NERVOUS SYSTEM
Introduction Questions
1. What is the major function of the neuron?
They are responsible for processing and relaying information throughout
the body.
2. Define depolarization.
The variation in electrical charge between the interior and exterior of the
plasma
membrane (in nerve or muscle cells) occurs due to changes in permeability
and the movement of sodium ions inward.
3. What determines whether a neuron is unipolar, bipolar, or multipolar?
The classification of a neuron as unipolar, bipolar, or multipolar is based
on the volume of signals being processed from the cell body.
Data and Observations
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
