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A&P 1
chap 12
| Question | Answer |
|---|---|
| Tactile and lamellated corpuscles are examples of__________. | exteroceptors |
| When all three sets of cones are stimulated, a person senses white light. | True |
| As you are going to class, another student is moving towards you. You experience___as your retinal cones detect color and send impulses to your visual cortex. Then you experience__________ when you become aware that the student is wearing a red coat. | sensation; perception |
| The decreased responsiveness to an ongoing stimulus is called___________. | sensory adaptation |
| A baby was born with a genetic mutation that results in nonfunctional rhodopsin. The function of which structure(s) will be affected? | Rods |
| The olfactory receptors are examples of what class of receptor? | Chemoreceptors |
| What is the treatment for a cataract? | Removal of the lens |
| What type of receptor allows a pole vaulter to keep track of his position in mid-air? | Proprioceptors |
| You are carrying a box when your friend suddenly places another heavy box on top of it. Your muscles respond by immediately contracting. What receptor sensed the rapid muscle lengthening and caused a reflexive response? | Muscle spindles |
| The optic disc is medial to the fovea centralis and is the site from which nerve fibers from the retina leave the eye and become part of the optic nerve. | True |
| Sensory receptors are specialized cells or multicellular structures that detect changes in the environment. | True |
| In hyperopia, the eyeball is too short and the focal point is in front of the retina. | False |
| Structurally, taste receptors are__________. | modified epithelial cells |
| Where are receptors for the general senses located? | Widely distributed throughout the body |
| The auditory ossicles are located in the inner ear | False |
| How do the senses of smell and taste interact to create the perception of flavor? | Smell and taste work together, with smell enhancing and contributing to the perception of taste. |
| Where are the receptors for hearing located? | In the spiral organ |
| What is glaucoma? | Increased pressure in the eye due to excess aqueous humor |
| When does refraction of light occur? | When light passes at an angle from one medium to another with a different density |
| List the components of the middle (vascular) layer of the wall of the eye. | Ciliary body, iris, and choroid coat |
| Each macula consists of a gelantinous mass containing small crystals that rests on an epithelium with hair cells. | True |
| Which of the following best describes the process that involves the brain interpreting sensory information and ascribing it to a specific location of the body? | Projection |
| The sense of taste requires that molecules bind to receptor proteins located__________. | on taste hairs |
| What occurs as a result of the tympanic reflex? | Vibrations are transmitted less effectively to the inner ear. |
| The interpretation of sensory input by the brain is referred to as___________. | perception |
| Impulses from the spiral organ travel to the central nervous system via the vestibulocochlear nerve. | True |
| Max returns to his dorm room late at night to find his roommate throwing up. The smell is at first so bad that Max wants to vomit too, but after helping his roommate clean up, the odor seems to fade. Max has experienced__________. | sensory adaptation |
| Some sensory nerve fibers from the retina of the right eye cross over to the left side of the CNS in the thalamus. | False |
| Following the path of sound transmission, what is the correct order of auditory ossicles? | Malleus → incus → stapes |
| Muscle spindles and Golgi tendon organs are receptors for__________ | proprioception |
| The area of the retina with the sharpest vision is the optic disc. | False |
| Cones are more sensitive to light than rods, but rods are important for color vision. | False |
| What is the order of structures through which light passes as it travels to the retina? | Cornea, aqueous humor, lens, vitreous humor |
| A cupula is part of each macula, moving in response to changes in the position of the head. | False |
| After taking a bite of pizza, sensory receptors are stimulated in your mouth. What is the order of information flow that results? | Stimulation of sensory receptors → impulse sent to CNS → sensation → perception |
| What is the function of a stretch reflex? | To contract a muscle that is stretched |
| The auditory tube runs between the throat and the__________. | middle ear |
| How is stereoscopic vision produced? | Each eye sees a slightly different view of an object. |
| What structure is part of the inner tunic of the eye? | retina |
| Olfactory receptors are examples of what class of sensory receptor? | Chemoreceptors |
| When the radial muscles of the iris contract, the diameter of the pupil decreases. | False |
| What structure produces tears? | Lacrimal gland |
| The inner ear is located within which cranial bone? | Temporal bone |
| Why are images detected by the lateral retina blurry? | Because there are more rods than cones in this region. |
| Hair cells of the spiral organ are located on the__________ and depolarize in response to sound. | basilar membrane |
| Which receptor/stimulus pair is correct? | Proprioceptors: stimulated by changes in tension in muscles and tendons. |
| What condition is due to an abnormality in the curvature of the lens or cornea, resulting in some areas of blurry vision? | Astigmatism |
| "Lazy eye" is a condition in which the muscles of one eye fail to position it correctly, resulting in a lack of coordination between the two eyes. where one eye constantly looks directly upward, what extrinsic eye muscle is too weak to function correctly? | Inferior rectus |
| What change results in farsightedness after the age of forty-five? | Loss of lens elasticity |
| Where did the sensory fibers originate that cross in the optic chiasma? | Medial (nasal) side of each retina |
| The sense of taste requires that molecules bind to receptor proteins located_________ | on taste hairs |
| How do pain receptors differ from other somatic receptors? | They adapt very little, if at all. |
| The conjunctiva is a layer of tissue that lines the inner surface of the eyelids and covers most of the anterior surface of the eye. | true |
| Cones are more sensitive to light than rods, but rods are important for color vision. | False |
| Jared has been a fan of rock music for many years and has attended numerous concerts never worn earplugs or protective earwear. in his 50s, he has become hard-of-hearing and can no longer detect quiet sounds or low talking. his symptoms be explained? | His hair cells are permanently damaged and desensitized to loud sounds. |
| Sound vibrations are conducted from the malleus to the stapes to the incus | False |
| Where are the receptors for hearing located? | In the spiral organ |
| In hyperopia, the eyeball is too short and the focal point is in front of the retina. | False |
Created by:
Bbuck1