BIO 370 Lab Exam questions well
answered
In nerve fibers, what is the term that characterizes the preferred natural direction of
conduction?
Asymmetric
Antidromic
Orthodromic
Bilateral - correct answer ✔✔ Orthodromic
How many total giant fiber(s) does the earthworm have?
Two
Four
Zero
Three - correct answer ✔✔ Three
Which giant fiber(s) have a higher stimulus threshold?
Lateral Fiber(s)
Medial Fiber(s) - correct answer ✔✔ Lateral Fiber(s)
In the earthworm, the median and lateral fiber(s) conduct their naturally generated impulses in
what direction(s)?
,Opposite Direction(s)
Same Direction(s) - correct answer ✔✔ Opposite Direction(s)
Due to the experimental setup, how will the recording appear after an action potential has
occurred?
Monophasic
Triphasic
Biphasic
Tetraphasic - correct answer ✔✔ Biphasic
What is the preferred natural direction of nerve conduction in the lateral fiber(s)?
Head to Tail
Tail to Head - correct answer ✔✔ Tail to Head
Nerves cannot be antidromically stimulated where the action potential propagates toward the
soma.
True
False - correct answer ✔✔ False
Which structure connects the individual cells that compose the giant fibers and allow for
electrical conduction down the fibers?
Gap Junctions
, Desmosomes
Cadherins
Tight Junctions - correct answer ✔✔ Gap Junctions
Is there a relationship between the stimulus strength and the response amplitude in a single
axon?
Yes
No - correct answer ✔✔ No
What is the name of the period where the neuron is completely incapable of producing an
action potential despite a larger than normal stimulus?
Depolarization
Hyperpolarization
Relative Refractory
Absolute Refractory - correct answer ✔✔ Absolute Refractory
What is the neural pathway of the knee-jerk reflex?
A) Muscle Spindle, Afferent Neuron, Motor Neuron, Muscle
B) Motor Neuron, Integration Center, Muscle, Effector
C)Receptor, Integration Center, Muscle
D) Receptor, Afferent Neuron, Integration Center, Efferent Neuron, Effector - correct answer ✔✔
D) Receptor, Afferent Neuron, Integration Center, Efferent Neuron, Effector
What is the sensory structure of the knee-jerk reflex arc?
answered
In nerve fibers, what is the term that characterizes the preferred natural direction of
conduction?
Asymmetric
Antidromic
Orthodromic
Bilateral - correct answer ✔✔ Orthodromic
How many total giant fiber(s) does the earthworm have?
Two
Four
Zero
Three - correct answer ✔✔ Three
Which giant fiber(s) have a higher stimulus threshold?
Lateral Fiber(s)
Medial Fiber(s) - correct answer ✔✔ Lateral Fiber(s)
In the earthworm, the median and lateral fiber(s) conduct their naturally generated impulses in
what direction(s)?
,Opposite Direction(s)
Same Direction(s) - correct answer ✔✔ Opposite Direction(s)
Due to the experimental setup, how will the recording appear after an action potential has
occurred?
Monophasic
Triphasic
Biphasic
Tetraphasic - correct answer ✔✔ Biphasic
What is the preferred natural direction of nerve conduction in the lateral fiber(s)?
Head to Tail
Tail to Head - correct answer ✔✔ Tail to Head
Nerves cannot be antidromically stimulated where the action potential propagates toward the
soma.
True
False - correct answer ✔✔ False
Which structure connects the individual cells that compose the giant fibers and allow for
electrical conduction down the fibers?
Gap Junctions
, Desmosomes
Cadherins
Tight Junctions - correct answer ✔✔ Gap Junctions
Is there a relationship between the stimulus strength and the response amplitude in a single
axon?
Yes
No - correct answer ✔✔ No
What is the name of the period where the neuron is completely incapable of producing an
action potential despite a larger than normal stimulus?
Depolarization
Hyperpolarization
Relative Refractory
Absolute Refractory - correct answer ✔✔ Absolute Refractory
What is the neural pathway of the knee-jerk reflex?
A) Muscle Spindle, Afferent Neuron, Motor Neuron, Muscle
B) Motor Neuron, Integration Center, Muscle, Effector
C)Receptor, Integration Center, Muscle
D) Receptor, Afferent Neuron, Integration Center, Efferent Neuron, Effector - correct answer ✔✔
D) Receptor, Afferent Neuron, Integration Center, Efferent Neuron, Effector
What is the sensory structure of the knee-jerk reflex arc?
