PHYS 261 - Lab Quiz 4 Latest Update 2026 | Exam Prep |
100% Accurate Answers
1. The patellar reflex is a:
Stretch reflex
Withdrawal reflex
2. Which reflex protects eye tissues by causing blinking
accommodation
convergence
photo-pupil
corneal
3. If a patient has damage to the parasympathetic pathways, what effect would
this have on their pupillary light reflex?
The pupil would dilate in response to light.
The reflex would remain unaffected.
The pupil would constrict excessively in response to light.
The pupil would not constrict in response to light.
4. Explain the role of the spinal cord in the patellar reflex arc.
The spinal cord only transmits the signal without processing any
information.
The spinal cord is not involved in the patellar reflex arc.
The spinal cord processes the signal and sends it to the brain for
interpretation.
, The spinal cord acts as the integration center where the sensory
neuron transmits the signal to the motor neuron.
5. Explain how the components of the calcaneal tendon reflex arc work
together to produce a response.
The sensory neuron sends a signal to the muscle, causing it to
contract without spinal cord involvement.
The sensory neuron detects the stretch in the tendon and sends a
signal to the spinal cord, which then activates the motor neuron to
contract the muscle.
The motor neuron sends a signal to the brain, which then activates the
sensory neuron to detect the stretch.
The spinal cord directly contracts the muscle without sensory input.
6. What is the primary function of the pupillary light reflex?
To facilitate color vision.
To improve depth perception.
To enhance visual acuity in low light.
To protect the retina from excessive light exposure.
7. Which of the following is an example of a stretch reflex?
fear conditioning
a spinal tap
the knee jerk
the fight or flight response
the vomit reflex
100% Accurate Answers
1. The patellar reflex is a:
Stretch reflex
Withdrawal reflex
2. Which reflex protects eye tissues by causing blinking
accommodation
convergence
photo-pupil
corneal
3. If a patient has damage to the parasympathetic pathways, what effect would
this have on their pupillary light reflex?
The pupil would dilate in response to light.
The reflex would remain unaffected.
The pupil would constrict excessively in response to light.
The pupil would not constrict in response to light.
4. Explain the role of the spinal cord in the patellar reflex arc.
The spinal cord only transmits the signal without processing any
information.
The spinal cord is not involved in the patellar reflex arc.
The spinal cord processes the signal and sends it to the brain for
interpretation.
, The spinal cord acts as the integration center where the sensory
neuron transmits the signal to the motor neuron.
5. Explain how the components of the calcaneal tendon reflex arc work
together to produce a response.
The sensory neuron sends a signal to the muscle, causing it to
contract without spinal cord involvement.
The sensory neuron detects the stretch in the tendon and sends a
signal to the spinal cord, which then activates the motor neuron to
contract the muscle.
The motor neuron sends a signal to the brain, which then activates the
sensory neuron to detect the stretch.
The spinal cord directly contracts the muscle without sensory input.
6. What is the primary function of the pupillary light reflex?
To facilitate color vision.
To improve depth perception.
To enhance visual acuity in low light.
To protect the retina from excessive light exposure.
7. Which of the following is an example of a stretch reflex?
fear conditioning
a spinal tap
the knee jerk
the fight or flight response
the vomit reflex
