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WorksheetsThe Senses
Total questions: 46
Worksheet time: 23mins
Match each term from the Vocab list to its correct definition.
Choroid
Middle, vascular layer of the eye
Cochlea
Coiled tube in the inner ear
Iris
Colored, muscular part of the eye
Labyrinth
Complex system of connecting chambers and tubes of the inner ear
Lacri- (lacrimal)
Tear gland
Match each term from the Vocab list to its correct definition.
Macula (macula lutea)
Yellowish spot on the retina
Olfact- (olfactory)
Pertaining to the sense of smell
Scler- (sclera)
Tough, outer protective layer of the eye
Tympan- (tympanic membrane)
Eardrum
Vitre- (vitreous humor)
Clear, jelly-like substance within the eye
Which receptors respond to temperature differences?
Thermoreceptors
Mechanoreceptors
Chemoreceptors
Photoreceptors
Which receptors detect tissue damage?
Pain receptors
Photoreceptors
Chemoreceptors
Mechanoreceptors
Which receptors respond to changes in pressure or movement?
Mechanoreceptors
Chemoreceptors
Thermoreceptors
Photoreceptors
Photoreceptors primarily respond to which stimulus?
Light
Chemical concentration
Temperature differences
Pressure or movement
Match each receptor type to its function.
Chemoreceptors
Receptors sensitive to changes in chemical concentration
Pain receptors
Detect tissue damage
Thermoreceptors
Respond to temperature differences
Mechanoreceptors
Respond to changes in pressure or movement
Photoreceptors
Respond to light; found in the eye
Which statement best defines perception?
Conscious awareness of stimuli
The brain’s use of projection to identify a stimulus’s origin
Stimulation of receptors that send impulses to the brain
Dependence of sensation on the brain region receiving impulses
A sensation occurs when (a) .
What is the role of projection?
Sending the sensation back to its point of origin so the area of stimulation can be pinpointed
Amplifying impulses so receptors respond more strongly
Converting incoming stimuli into hormones
Storing the sensation as a long-term memory
What determines the particular sensation experienced?
The region of the brain that receives the impulses
The strength of the external stimulus
The time of day the stimulus occurs
The total number of receptors activated
General senses are widespread; which body structures are associated with them?
Only the skin
Skin, muscles, joints, and viscera
Eyes and ears only
Brain and spinal cord only
Which set of items is listed under general senses?
Touch, pressure, position, pain
Taste, smell, sight, hearing
Balance, taste, smell, sight
Temperature, taste, smell, balance
Which group represents the special senses?
Touch, pressure, position, pain
Taste, smell, sight, hearing, balance
Skin, muscles, joints, viscera
Pressure, temperature, pain
How are general senses distributed in the body?
Concentrated in specialized organs
Receptors all over the body
Limited to the brain
Found only in the skin
Identify the receptor type described as being in epithelial tissues and associated with itching and other sensations.
Free nerve endings
Tactile (Meissner's) corpuscles
Lamellated (Pacinian) corpuscles
Tactile (Meissner's) corpuscles respond to (a) .
Where are higher concentrations of tactile (Meissner's) corpuscles found?
Hairless areas such as lips, fingertips, palms, soles, nipples
Hairy areas such as the scalp
Deep dermis and subcutaneous layer
What is the primary function of lamellated (Pacinian) corpuscles?
Detect deep pressure
Sense itching
Respond to motion of contacting objects
Match each receptor type with its description from the slide.
Free nerve endings
Associated with itching and other sensations in epithelial tissues
Tactile (Meissner's) corpuscles
Flattened connective tissue sheaths around two or more nerve fibers; respond to motion of objects contacting the skin
Lamellated (Pacinian) corpuscles
Large structures of connective tissue fibers and cells; detect deep pressure and are common in deep dermis and subcutaneous layer
Warm receptors respond to temperatures between which values?
25°C to 45°C (77° F - 113°F)
10°C to 20°C (50° F - 68°F)
0°C to 10°C (32°F - 50°F)
45°C to 65°C (113°F - 149°F)
Cold receptors respond to temperatures between which values?
10°C to 20°C (50°F - 68°F)
25°C to 45°C (77°F - 113°F)
0°C to 10°C (32°F - 50°F)
20°C to 30°C (50°F - 86°F)
What occurs above the temperature range for warm receptors?
Pain receptors are stimulated, producing a burning sensation
Pain receptors are inhibited, producing a cooling sensation
Mechanoreceptors are activated, producing a vibration sensation
Taste receptors are activated, producing a bitter sensation
What occurs below the temperature range for cold receptors?
Pain receptors are stimulated, producing a freezing sensation
Pain receptors are suppressed, producing a warm sensation
Warm receptors produce a burning sensation without pain
No change in sensation occurs
Which statement best describes the adaptation of warm and cold receptors during continuous stimulation?
They adapt quickly; sensations start to fade after about 1 minute
They adapt slowly; sensations intensify for several hours
They do not adapt; sensations remain constant indefinitely
They adapt only in warm conditions, not cold
Which proprioceptor lies within the muscle fibers?
Muscle spindle
Tendon organ (Golgi tendon organ)
Tendon
Which structure is located at the musculotendinous junction?
Muscle spindle
Tendon organ (Golgi tendon organ)
Muscle fibers
Select all items that are proprioceptors.
Muscle spindle
Tendon organ (Golgi tendon organ)
Muscle fibers
Tendon
Which receptors in the viscera produce sensations?
Visceral pain receptors
All receptor types equally
Thermoreceptors
Proprioceptors
Which conditions can produce strong visceral pain even when tissue damage may not? Select all that apply.
Stretch
Spasms
Superficial cuts
Mild bruising
Visceral pain seems to come from which sources? Select all that apply.
Mechanoreceptors
Decreased blood flow (oxygen deprivation)
Chemicals stimulating chemoreceptors
Photoreceptors
What explains referred pain, where visceral pain feels as if it is coming from another body area?
Common nerve pathways leading from skin and internal organs
Inflammation of skeletal muscles
Blockage of arteries supplying the organ
Displacement of internal organs
Which example illustrates referred pain?
Pain from the heart felt as if it is coming from the left shoulder or left arm
Stomach pain felt only at the stomach
A skin burn felt only at the burn site
A knee injury causing pain localized to the knee
In the diagram titled “Referred Pain: Common Nerve Pathways,” which labeled structure contains the cell bodies of sensory neurons conveying signals toward the spinal cord and brain?
Dorsal root ganglion
Paravertebral ganglion
Spinal cord gray matter
Pain receptor in the skin
Which fibers are myelinated, carry impulses rapidly, are associated with sharp pain that ceases when the stimulus stops, and are usually sensed as coming from the skin?
Fast (acute) pain fibers
Slow (chronic) pain fibers
Both fiber types
Neither fiber type
Which statement best describes slow (chronic) pain fibers?
They are myelinated and conduct impulses rapidly.
They are unmyelinated and conduct impulses slowly.
They cease sending impulses when the stimulus stops.
They are usually sensed as coming from the skin.
Select all features that apply to slow (chronic) pain fibers.
Unmyelinated
Produce a dull, achy sensation that is difficult to localize
Continue sending impulses after the stimulus stops
Usually sensed as coming from deep tissues
Myelinated
When pain stimuli trigger both fast and slow pain fibers, what sequence of sensation is typically produced?
A sharp pain followed by a slow, aching pain
A slow, aching pain followed by a sharp pain
Only a sharp, localized pain
Only a diffuse, dull aching pain
Match each pain fiber to its description.
Fast (acute) pain fibers
Myelinated; rapid conduction; sharp pain that ceases when stimulus stops; usually sensed as coming from the skin
Slow (chronic) pain fibers
Unmyelinated; slow conduction; dull, achy, difficult to localize; continue after stimulus stops; usually sensed as coming from deep tissues
Both fiber types
Can be triggered together, producing a sharp pain followed by a slow, aching pain
Pain impulses from the head reach the brain primarily via which route?
Cranial nerves
Spinal nerves
Autonomic nerves
Motor neurons
Pain impulses from areas other than the head travel to the brain on (a) nerves?
Pain impulses entering the spinal cord are processed in the (a) gray matter region before being sent to the brain?
Most pain fibers terminate in which brain regions? Select all that apply.
Reticular formation
Thalamus
Limbic system
Cerebellar cortex
From the reticular formation, thalamus, or limbic system, other neurons conduct pain information to which structures? Select all that apply.
Hypothalamus
Cerebral cortex
Medulla oblongata
Cerebellum
Which statement best describes the role of the limbic system in pain?
Provides the emotional response to pain
Localizes the exact source of pain
Processes spinal reflexes to withdraw from pain
Initiates hormonal release in response to pain
Which functions are attributed to the cerebral cortex in pain processing? Select all that apply.
Finds the pain source
Determines the intensity of pain
Formulates motor responses to the pain
Generates the primary emotional response to pain
