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WorksheetsPhysiology Mid MP 4 Exam
Total questions: 90
Worksheet time: 2hrs 30mins
What is the primary function of sensory neurons?
To detect stimuli from the environment or body
To carry commands for action
To integrate and process signals
To transmit signals to muscles and glands
Which direction do motor neurons transmit impulses?
From sensory receptors to the CNS
From the CNS to muscles and glands
From the brain to the spinal cord
Between sensory and motor neurons
What is the role of interneurons in reflexes?
To detect stimuli
To transmit impulses to effectors
To process and relay signals
To carry commands for action
What type of neuron detects heat in your fingertip?
Sensory neuron
Motor neuron
Relay neuron
Interneuron
What is the function of motor neurons?
To detect environmental stimuli
To carry commands for action
To process and integrate signals
To transmit signals to the brain
What is the term used for sensory neurons?
Relay neurons
Afferent neurons
Association neurons
Efferent neurons
What is the term used for motor neurons?
Relay neurons
Efferent neurons
Afferent neurons
Sensory neurons
What is a reflex action?
A slow, voluntary movement in response to a stimulus
An immediate, involuntary movement or glandular secretion that protects the body from harm
A conscious decision to move a muscle
A learned behavior
Which of the following is an example of a reflex action?
Writing your name
Jerking your hand away from a hot object
Solving a math problem
Walking to school
What is the main function of a reflex action?
To help in digestion
To protect the body from harm
To improve memory
To control voluntary movements
Which part of the nervous system is primarily involved in the integration center of a reflex arc?
Brain
Spinal cord
Heart
Lungs
What is the role of the receptor in a reflex arc?
To carry signals to muscles
To detect the stimulus
To relay information to the brain
To produce hormones
Which neuron carries the signal from the receptor to the spinal cord in a reflex arc?
Motor neuron
Sensory neuron
Interneuron
Effector neuron
What is the effector in a reflex arc?
The neuron that detects the stimulus
The muscle or gland that carries out the response
The part of the brain that processes information
The spinal cord
Which of the following is NOT a component of the reflex arc?
Receptor
Sensory neuron
Integration center
Blood vessel
What type of reflex involves only a sensory neuron and a motor neuron?
Polysynaptic reflex
Monosynaptic reflex
Voluntary reflex
Conditioned reflex
Which example best illustrates a monosynaptic reflex?
Blinking when something nears your eye
Knee-jerk response
Salivating at the smell of food
Sweating when hot
What is the correct sequence of components in a reflex arc?
Effector → Motor neuron → Integration center → Sensory neuron → Receptor
Receptor → Sensory neuron → Integration center → Motor neuron → Effector
Sensory neuron → Receptor → Motor neuron → Integration center → Effector
Integration center → Effector → Motor neuron → Receptor → Sensory neuron
How does the reflex arc contribute to the speed of a reflex action?
By involving the brain in decision making
By bypassing the brain and using the spinal cord for rapid response
By using hormones for communication
By slowing down the response for accuracy
Why is the reflex action considered involuntary?
It requires conscious thought
It is controlled by the brain
It happens automatically without conscious control
It is learned over time
Which statement best describes the relationship between the reflex arc and reflex action?
Reflex action is the pathway, and reflex arc is the response
Reflex arc is the structural basis for the reflex action
Reflex arc and reflex action are unrelated
Reflex action is voluntary, and reflex arc is involuntary
If the sensory neuron in a reflex arc is damaged, what would most likely happen?
The stimulus would not be detected
The response would be faster
The effector would act without a signal
The integration center would be bypassed
Which of the following best explains why most reflexes are polysynaptic?
They involve only one neuron
They require multiple interneurons for complex responses
They are always voluntary
They do not involve the spinal cord
A person accidentally touches a hot stove and immediately pulls their hand away. Which part of the reflex arc is responsible for detecting the heat?
Motor neuron
Receptor
Effector
Integration center
Which component of the reflex arc directly stimulates the effector to produce a response?
Sensory neuron
Motor neuron
Integration center
Receptor
Why does the knee-jerk reflex occur so quickly compared to other reflexes?
It involves the brain
It is a monosynaptic reflex with a direct connection between sensory and motor neurons
It uses hormones for signaling
It involves multiple interneurons
Which of the following best describes the role of the integration center in a reflex arc?
It detects the stimulus
It relays the signal between sensory and motor neurons
It produces the response
It carries the signal to the effector
A student claims that all reflex actions require the brain to process the stimulus before a response occurs. Use evidence from the reflex arc to support or refute this claim.
Support: The brain is always involved in reflex actions.
Refute: Reflex arcs bypass the brain and use the spinal cord for rapid responses.
Support: Reflex actions are voluntary and require conscious thought.
Refute: Reflex actions are learned behaviors processed by the brain.
Analyze why the reflex arc is considered an efficient pathway for protecting the body from harm.
It slows down the response for accuracy.
It allows immediate, automatic responses without conscious thought.
It requires multiple steps involving the brain.
It only works for voluntary actions.
Given the components of a reflex arc, predict what might happen if the motor neuron fails to function.
The stimulus would not be detected.
The response would not occur.
The integration center would be bypassed.
The effector would act without a signal.
Evaluate the importance of the integration center in the reflex arc for complex reflexes.
It is unnecessary for any reflex.
It allows for communication between sensory and motor neurons, especially in polysynaptic reflexes.
It only functions in voluntary actions.
It slows down the reflex response.
Suppose a person’s hand does not jerk away after touching something hot. Which part of the reflex arc is most likely malfunctioning?
Receptor
Sensory neuron
Motor neuron
Any of the above
Compare and contrast monosynaptic and polysynaptic reflexes in terms of their speed and complexity.
Monosynaptic reflexes are slower and more complex than polysynaptic reflexes.
Polysynaptic reflexes are faster and simpler than monosynaptic reflexes.
Monosynaptic reflexes are faster and simpler; polysynaptic reflexes are slower and more complex.
Both types have the same speed and complexity.
A person blinks when an object approaches their eye. Explain how the reflex arc enables this protective response.
The brain processes the stimulus and sends a signal to blink.
The receptor detects the approaching object, the sensory neuron carries the signal to the spinal cord, the integration center relays it to the motor neuron, and the effector (eye muscles) causes blinking.
The effector detects the stimulus and responds directly.
The spinal cord is not involved in this reflex.
Design an experiment to test the speed of a reflex action in humans. Which variable would you measure?
The color of the stimulus
The time taken from stimulus to response
The number of neurons involved
The temperature of the room
Justify why reflex actions are crucial for survival in dangerous situations.
They allow for slow, thoughtful responses.
They provide immediate protection without conscious thought, minimizing injury.
They are only used for learned behaviors.
They require the brain to process every stimulus.
A patient has damage to their spinal cord but their brain is intact. Predict how this might affect their reflex actions.
Reflex actions would remain unaffected.
Reflex actions would be impaired or absent because the spinal cord is essential for the reflex arc.
Reflex actions would become faster.
Reflex actions would be controlled by the brain instead.
Label the Reflex arc
Effector (muscle)
Sensory Receptor
Sensory Neuron
Integration
Motor Neuron
Your (a)
includes your brain, spinal cord, and nerves. The diagram shows how these parts of your nervous system are
connected. (b) are made up of bundles of nerve cells, or (c) , and are found throughout your body.
Label the parts of a reflex arc
Match the following neurons with their functions in a reflex arc.
Sensory neuron
Carries signal from sensory receptors to the central nervous system
Motor neuron
Carries signal from the central nervous system to muscles or glands
Interneuron
Relays signal between sensory and motor neurons
Efferent neuron
Another term for motor neuron
A (a) is an (b) response while a (c) is a thoughtful response that the (d) processes BEFORE reacting.
Brain
Nerve
Brain Stem
Spinal Cord
Nerve Cell
When a person is suddenly cut by a sharp object, a nervous impulse is sent along a sensory neuron to the spinal cord. The impulse is immediately transmitted through motor neurons to produce a response. Which of the following correctly identifies and describes this response?
It is a conditioned response that occurs only to prevent injury.
It is a learned response that does not occur in infants and small children.
It is a reflex response that causes various muscles to contract in order to move away from the object.
It is a voluntary response that is initiated only after the impulse has been carried to the relevant area in the brain.
Which structure would detect a stimulus?
A
C
D
E
In the Patellar reflex arc (knee jerk), the leg muscle is the
stimulus
effector
response
sensory neuron
Where does the reflex start?
Receptor
Sensory Neuron
Integration
Motor Neuron
Effector
Where does the reflex end?
Receptor
Sensory Neuron
Integration
Motor Neuron
Effector
Where is the interneuron in this reflex arc?
A
B
D
F
There are ______ pairs of cranial nerves
10
12
31
14
Sense of smell
Olfactory - I
Optic - II
Oculomotor - III
Facial - VII
The Optic nerve is what number CN?
2
3
1
4
5
Optic nerve
I
II
III
IV
Cranial Nerve 3 =
Olfactory
Oculomator
Optic
Trochlear
Eye movement down and in
Occulomotor - III
Trochlear - IV
Trigeminal - V
Abducens - VI
Numbed by the dentist when you're getting a cavity filled in the lower jaw
Occulomotor - III
Trigeminal - V
Facial - VII
Glossopharyngeal - VIIII
Chewing
Optic - II
Accessory - XI
Abducens - VI
Trigeminal - V
Moves eyes laterally away from the nose
Abducens - VI
Facial - VII
Trigeminal - V
Accessory - XI
What number CN is the Facial nerve
1
3
5
7
9
Bell's Palsy
Trigeminal - V
Facial - VII
Olfactory - I
Vagus - X
A loss of hearing could be associated with which cranial nerve?
Olfactory - I
Trigeminal - V
Vestibulocochlear - VIII
Accessory - XI
Balance
Optic - II
Trigeminal - V
Vestibulocochlear - VIII
Vagus - X
Allows you to swallow your food
Trigeminal - V
Facial - VII
Glossopharyngeal - IX
Hypoglossal- XII
What is the Number and function of the Glossopharyngeal
#5 - moves the tongue
#8 - helps you hear
#11 - moves the tongue
#9 - taste, swallowing, saliva
gag reflex
Glossopharyngeal - IX
Vagus - X
Trigeminal - V
Optic - II
Vagus nerve
I
IX
X
XII
What is the Number and function of the Glossopharyngeal
#5 - moves the tongue
#8 - helps you hear
#11 - moves the tongue
#9 - taste, swallowing, saliva
Stimulates peristalsis
Vagus - X
Trochlear - IV
Abducens - VI
Hypoglossal - XII
Which # cranial nerve is the Accessory?
6
8
11
none of these
Shrugs the shoulders
Accessory - XI
Facial - VII
Vagus - X
Trigeminal - V
Moves the tongue
Trigeminal - V
Facial - VII
Hypoglossal - XII
Accessory - XI
Controls most of the movement of the eye
Abducens - VI
Trochlear - IV
Oculomotor - III
Hypoglossal - XII
looking outward and up
Trochlear - IV
Trigeminal - V
Glossopharyngeal - IX
Optic - II
abducts the eyes
Trigeminal - V
Abducens - VI
Oculomoter - III
Facial - VII
Match the following Cranial nerves
Abducens Nerve VI
moves eyeballs outwards
Facial Nerve VII
Mvmt of Face; some neck and ear muscles
Vestibulocochlear Nerve (auditory Nerve) VIII
Sense of hearing
Glossopharyngeal Nerve IX
Sense of taste
Vagus Nerve X
Mvmt of heart rate; breathing; digestion
Match the following Cranial Nerves
Olfactory Nerve I
Sense of Smell
Optic Nerve II
sense of sight
Oculomotor Nerve III
Constricts pupils; raises eyelids;
Trochlear Nerve IV
moves eyeballs down and out
Trigeminal Nerve V
sensations of face & jaw & tongue mvmnt
Match the following Cranial nerves
Spinal Accessory Nerve XI
Shoulder; mvmt of neck muscles
Hypoglossal Nerve VII
Tongue movement
Facial Nerve VII
Facial expression
Which nerve is sensory and responsible for hearing and balance?
vestibulocochlear (VIII)
facial (VII)
vagus (X)
oculomotor (III)
Which nerve is sensory & motor and responsible for facial sensation and chewing?
trigeminal (V)
olfactory (I)
vagus (X)
oculomotor (III)
Which nerve is sensory & motor and responsible for tongue movement and taste?
glossopharyngeal (IX)
facial (VII)
trochlear (IV)
hypoglossal (XII)
Which nerve is sensory & motor and responsible for eye movement?
oculomotor (III)
vestibulocochlear (VIII)
hypoglossal (XII)
olfactory (I)
Which nerve is sensory & motor and responsible for facial movements and taste?
facial (VII)
olfactory (I)
vagus (X)
trochlear (IV)
The Facial nerve controls all of the following EXCEPT:
Taste on the anterior two-thirds of the tongue
Saliva production
Hearing
Facial expressions
Which cranial nerve is responsible for moving the tongue?
Hypoglossal
Glossopharyngeal
Vagus
Accessory
Which cranial nerve is responsible for smell?
Optic
Vagus
Olfactory
Trigeminal
Match the following cranial nerves to their function
Olfactory
sense of smell
vestibulocochlear
Sense of hearing and balance
Optic
Vision
Facial
sense of touch on face, facial muscles
Vagal
parasympathetic control of heart, digestive tract
Match the cranial nerve with its function
hypoglossal
control tongue muscles
trigeminal
chewing
vestibulocochlear
balance
olfactory
smell
optic
vision
