Biology 252 Exam 1
2025/2026
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with
Verified Questions and Answers
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, how varied components of living things adjust to maintain a constant
internal living environment. There is a balanced dynamic state! Diseases
What is homeostasis? result from homeostatic imbalances (diabetes)
chemical - cellular - tissue - organ - organ system - organismal
What are the levels of organization?
The Central nervous system (brain and spinal cord) and the peripheral
What is the nervous system made of? nervous system (cranial nerves and spinal nerves).
Input - Processing - Output. Explain.
What is the big picture of the
nervous system? What does this
mean?
Most of our wiring is _____. insulated.
Neuron
Soma- body of the neuron cell.
Neurofibrils- work with microtubules to compartmentalize rough ER into
Nissl bodies.
Nissl bodies- help identify neurons in tissue sections with mixed cell
types
Describe the soma, neurofibrils, Dendrites- primary site for receiving signals from other neurons
Nissl bodies, dendrites, axon and axon hillock- nerve fiber where axon originates
axon hillock. axon- conducs nerve signals to remote point from the soma. contains
Varicosities secrete NTs.
How are neurons classified? By number of processes extending from the soma.
multipolar - one axon with multiple dendrites. Includes most neurons of
the brain and spinal cord.
bipolar- one axon and one dendrite.
What is the difference in multipolar Anaxonic- multiple dendrites, no axon. Communicate through dendrites
nerons, bipolar neurons, and and produce no action. found in brain, retina, and adrenal medulla.
anaxonic neurons?
two way passage of proteins, organelles, and other materials along the
What is axonal transport? axon.
What is anterograde and retrograde anterograde- moves down the axon, away from the soma.
transport? retrograde- moves up the axon, towards the soma.
1. Excitability (response to stimuli or environmental change).
2. Conductivity ( production of electrical signals that are conducted to
other cells at distant locations).
What are 3 properties that enable 3. Secretion (when a signal reaches the end of a nerve fiber, neuron
communication with other cells? secretes a NT that crosses gap and enters the next cell).
2025/2026
Exam Prep Material
with
Verified Questions and Answers
A+ Grades Guarantee
, how varied components of living things adjust to maintain a constant
internal living environment. There is a balanced dynamic state! Diseases
What is homeostasis? result from homeostatic imbalances (diabetes)
chemical - cellular - tissue - organ - organ system - organismal
What are the levels of organization?
The Central nervous system (brain and spinal cord) and the peripheral
What is the nervous system made of? nervous system (cranial nerves and spinal nerves).
Input - Processing - Output. Explain.
What is the big picture of the
nervous system? What does this
mean?
Most of our wiring is _____. insulated.
Neuron
Soma- body of the neuron cell.
Neurofibrils- work with microtubules to compartmentalize rough ER into
Nissl bodies.
Nissl bodies- help identify neurons in tissue sections with mixed cell
types
Describe the soma, neurofibrils, Dendrites- primary site for receiving signals from other neurons
Nissl bodies, dendrites, axon and axon hillock- nerve fiber where axon originates
axon hillock. axon- conducs nerve signals to remote point from the soma. contains
Varicosities secrete NTs.
How are neurons classified? By number of processes extending from the soma.
multipolar - one axon with multiple dendrites. Includes most neurons of
the brain and spinal cord.
bipolar- one axon and one dendrite.
What is the difference in multipolar Anaxonic- multiple dendrites, no axon. Communicate through dendrites
nerons, bipolar neurons, and and produce no action. found in brain, retina, and adrenal medulla.
anaxonic neurons?
two way passage of proteins, organelles, and other materials along the
What is axonal transport? axon.
What is anterograde and retrograde anterograde- moves down the axon, away from the soma.
transport? retrograde- moves up the axon, towards the soma.
1. Excitability (response to stimuli or environmental change).
2. Conductivity ( production of electrical signals that are conducted to
other cells at distant locations).
What are 3 properties that enable 3. Secretion (when a signal reaches the end of a nerve fiber, neuron
communication with other cells? secretes a NT that crosses gap and enters the next cell).
