A&P - Senses

What are the two groups of sense organs?

Special senses and general senses.

What are the general senses?

Pain, temperature, touch, pressure, and body position.

What are the special senses?

Smell, hearing, vision, taste, and equilibrium.

What is the basic function of sensory receptors?

To detect specific stimuli.

What are the three divisions of the ear?

External ear, middle ear, and inner ear.

What structures are included in the fibrous layer of the eye?

Sclera and cornea.

What do rods in the retina do?

They are responsible for vision in low light conditions.

What do cones in the retina do?

They are responsible for color vision and detail.

What is the function of the ciliary muscle?

It adjusts the lens shape for focusing.

What is myopia?

Nearsightedness, where distant objects appear blurry.

What is hyperopia?

Farsightedness, where close objects appear blurry.

What fluid is found in the anterior chamber of the eye?

Aqueous humor.

What is the function of the optic nerve?

To transmit visual information from the retina to the brain.

What are the main components of the eye?

Cornea, pupil, iris, lens, and retina.

What is the role of the choroid layer?

To supply oxygen and nutrients to the retina.

What is glaucoma?

A condition characterized by increased pressure in the eye, leading to vision loss.

What is diabetic retinopathy?

A diabetes complication that affects the eyes, causing damage to the retina.

What is the role of taste buds?

To detect taste sensations.

Which cranial nerves carry gustatory impulses?

Cranial nerves VII (Facial) and IX (Glossopharyngeal).

What are the four basic taste sensations?

Sweet, sour, bitter, and salty.

What is the function of the olfactory receptors?

To detect odor-causing chemicals.

What happens during the integration of senses in the brain?

All incoming signals are combined with other sensory inputs and memories to create perception.

What can cause temporary impairment of general sense receptors?

Third-degree burns.

What are the components of the inner ear?

Vestibule, semicircular canals, and cochlea.

What is the auditory (eustachian) tube's function?

To connect the middle ear to the throat.

What does the organ of Corti do?

It is responsible for converting sound vibrations into neural signals.

What is presbycusis?

Age-related hearing loss.

What condition is characterized by a spinning sensation?

Vertigo.

What is the function of hair cells in the cochlea?

To convert sound wave vibrations into electrical signals.

What are the three main structures of the middle ear?

Malleus, incus, and stapes.

What is the significance of the fovea centralis?

It is the area of the retina with the highest visual acuity.

What is astigmatism?

A refractive error caused by an irregularly shaped cornea.

What does the term 'proprioception' refer to?

The body's ability to sense its position in space.

What is the difference between free nerve endings and encapsulated nerve endings?

Free nerve endings are unspecialized while encapsulated endings have a covering capsule.

What is the function of the vestibular nerve?

To transmit balance information from the inner ear to the brain.

What type of sensory receptors are located in the skin?

Pain, touch, temperature, and pressure receptors.

What condition is characterized by clouding of the lens?

Cataracts.

How do sound waves affect the cochlear structures?

They cause vibration that is converted into nerve impulses by the hair cells.

What is the role of the maculae in equilibrium?

To detect changes in head position and movement.

What happens with advancing age in terms of sensory function?

There may be a degeneration leading to reduced sensory function.

What are bulboid corpuscles responsible for?

They detect light touch and pressure.

What are the two types of hearing impairments?

Conduction impairments and nerve impairments.

What type of vision problem is caused by unevenness in the cornea?

Astigmatism.

What is the role of the lacrimal caruncle?

To produce tears.

What structures are associated with the sense of smell?

Olfactory receptors and olfactory bulbs.

What is the purpose of retinal blood vessels?

To supply blood to the retina.

What can severe nasal congestion interfere with?

The stimulation of olfactory receptors.

What type of vision issue does presbyopia cause?

Difficulty focusing on close objects due to age-related changes.

What is nyctalopia?

Night blindness.

What condition involves the detachment of the retina?

Retinal detachment.

What is the primary visual cortex responsible for?

Processing visual information.

What are the olfactory bulbs?

Structures that relay sensory information from the olfactory receptors to the brain.

What does the vestibular apparatus detect?

Changes in static and dynamic equilibrium.

What is the term for the sensation of pressure in the skin?

Tactile sensation.

What are taste pores?

Small openings on taste buds that allow tastants to enter and stimulate receptors.

How do gustatory cells function?

They transduce chemical stimuli from food into nerve signals.

What happens to sensory receptors with third-degree burns?

They may experience temporary impairment.

What part of the eye is responsible for focusing light?

The lens.

What does sensory adaptation refer to?

The process by which sensory receptors become less responsive to a constant stimulus.

What cranial nerve is associated with hearing?

Cochlear nerve (CN VIII).

What role does the optic chiasma play in vision?

It is where the optic nerves cross, allowing visual information from both eyes to be processed in both hemispheres of the brain.

What information do peripheral receptors provide?

Sense of touch, pain, temperature, and proprioception.

What is the role of the endocrine system in sensation?

It can influence sensory perception by releasing hormones that affect the central nervous system.

What sensations are primarily processed in the parietal lobe?

Touch, pain, and proprioception.

What is the olfactory tract?

A pathway that transmits olfactory information from the bulbs to the brain.

What does the term 'gustation' refer to?

The sense of taste.

What is the purpose of the sclera in the eye?

To provide structure and protect the eye.

Where is the optic disk located?

It is the point where the optic nerve leaves the retina.

What structures are responsible for detecting sound waves?

Hair cells in the cochlea.

What is the macula in the cochlea?

An area involved in balance and spatial orientation.

What are the layers of the eye?

Fibrous layer, vascular layer, and inner layer.

What is a common treatment for cataracts?

Surgery to replace the cloudy lens.

What type of vision condition is age-related macular degeneration (AMD)?

A leading cause of vision loss in older adults.

How are sound waves transmitted through the middle ear?

By the vibration of the ossicles (malleus, incus, stapes).

What is conduction deafness?

A type of hearing impairment resulting from problems in the outer or middle ear that prevent sound from being conducted to the inner ear.

What happens to the senses as one ages?

There is often a gradual decline in the ability to perceive sensory signals.

What is strabismus?

A condition where the eyes do not properly align with each other.

What is the difference between vertical and horizontal semicircular canals?

They detect different planes of head movement for balance.

What are the symptoms of acute bacterial conjunctivitis?

Redness, swelling, and discharge from the eye.