BIOD 152: MODULE 1 EXAM Q & A TEST
Question 1
2..5 pts
This is a bundle of axons found in the peripheral nervous system. Your
Answer:
The nerves
Nerve
Question 2
2..5 pts
This part of the autonomic system increases digestion. Your
Answer:
Parasympathetic
Parasympathetic
What is false about the flexor withdrawal reflex?
A. It does not involve interneurons.
B. It involves excitatory interneurons.
C. It involves inhibitory interneurons.
D. The effect of the reflex is to create a co-contraction of two muscles
Correct
!
E. A&D
F. B&C
, BIOD 152: MODULE 1 EXAM Q & A TEST
Answer the following essay questions:
You touch a hot pan when cooking. List out the steps, in detail, of the
nervous pathway of the reflex that occurs. Include any sensory organs
involved and the action of the reflex.
Your Answer:
The sensory neuron detects the touch, then it sends signal through the
ganglion in then the sensory neuron synapses in the gray matter in the
spinal cord in to the motor neuron. Then the motor neuron sends signal to
the ventral root and synapses back.
CORRECT ANSWER
Flexor withdrawal reflex:
• Pain receptor in skin
• Sensory (afferent) neuron through DRG
• Interneurons in spinal cord:
• (1) Excitatory to biceps
• (2) Inhibitory to triceps
• Motor neurons: Contract biceps, inhibit triceps
• Action: Elbow flexion pulls hand away from flame.
Answer the following essay questions:
Botulism is a disease caused by a neurotoxin that interferes with the
release of Acetylcholine. Patients with this disease experience flaccid
, BIOD 152: MODULE 1 EXAM Q & A TEST
paralysis, or the inability to contract their muscles. Explain why this would
occur.
CORRECT Answer:
The nervous system interacts with the muscular system at the neuromuscular
junction. Acetylcholine must be released from the presynaptic motor neuron
into the synapse to bind onto the muscle fiber, eventually causing a muscle
contraction. Without the release of acetylcholine, there will be no interaction
between the nervous system and the muscular system and therefore no muscle
contraction.
Question 3
2..5 pts
The dorsal root of a nerve contains what type of neurons? Your
Answer:
The axons of sensory neurons
Sensory (Afferent)
Question 4
2..5 pts
This part of a neuron conducts nerve impulses towards the cell body.
Your Answer:
Dendrites
Dendrites
Question 1
2..5 pts
This is a bundle of axons found in the peripheral nervous system. Your
Answer:
The nerves
Nerve
Question 2
2..5 pts
This part of the autonomic system increases digestion. Your
Answer:
Parasympathetic
Parasympathetic
What is false about the flexor withdrawal reflex?
A. It does not involve interneurons.
B. It involves excitatory interneurons.
C. It involves inhibitory interneurons.
D. The effect of the reflex is to create a co-contraction of two muscles
Correct
!
E. A&D
F. B&C
, BIOD 152: MODULE 1 EXAM Q & A TEST
Answer the following essay questions:
You touch a hot pan when cooking. List out the steps, in detail, of the
nervous pathway of the reflex that occurs. Include any sensory organs
involved and the action of the reflex.
Your Answer:
The sensory neuron detects the touch, then it sends signal through the
ganglion in then the sensory neuron synapses in the gray matter in the
spinal cord in to the motor neuron. Then the motor neuron sends signal to
the ventral root and synapses back.
CORRECT ANSWER
Flexor withdrawal reflex:
• Pain receptor in skin
• Sensory (afferent) neuron through DRG
• Interneurons in spinal cord:
• (1) Excitatory to biceps
• (2) Inhibitory to triceps
• Motor neurons: Contract biceps, inhibit triceps
• Action: Elbow flexion pulls hand away from flame.
Answer the following essay questions:
Botulism is a disease caused by a neurotoxin that interferes with the
release of Acetylcholine. Patients with this disease experience flaccid
, BIOD 152: MODULE 1 EXAM Q & A TEST
paralysis, or the inability to contract their muscles. Explain why this would
occur.
CORRECT Answer:
The nervous system interacts with the muscular system at the neuromuscular
junction. Acetylcholine must be released from the presynaptic motor neuron
into the synapse to bind onto the muscle fiber, eventually causing a muscle
contraction. Without the release of acetylcholine, there will be no interaction
between the nervous system and the muscular system and therefore no muscle
contraction.
Question 3
2..5 pts
The dorsal root of a nerve contains what type of neurons? Your
Answer:
The axons of sensory neurons
Sensory (Afferent)
Question 4
2..5 pts
This part of a neuron conducts nerve impulses towards the cell body.
Your Answer:
Dendrites
Dendrites
