BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 30, Problem 13SA
Summary Introduction
Introduction:
The ear is one of the five sensory organs present in the body. The organ of Corti is situated between the vestibular duct and tympanic duct situated in the scala media of the cochlea that is present inside the inner ear. It is made up of mechanosensory cells that are also known as the hair cells. The sensory information about body orientation, motion and equilibrium are provided by the vestibular apparatus.
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The semicircular canals monitor angular movements of the head (dynamic euqilibrium), the receptor region in each ampulla is called a _______, which consists of a tuft of hair cells covered with a gelatinous cap (ampullary cupula).
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crista ampullaris
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otolith
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Weber test
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Rinne test
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- Axons from the nasal half of the retina go to the _____ hemisphere of the brain. Axons from the temporal half of the retina go to the _____ hemisphere of the brain. a. contralateral . . . ipsilateral b. contralateral . . . contralateral c. ipsilateral . . . ipsilateral d. ipsilateral . . . contralateralarrow_forwardThe eye doctor uses an Acetylcholine-receptor blocker to maximally dilate the pupils; this allows the doctor to peer deep into the posterior eye-ball and observe the retina. Considering these facts, which nervous system is usually controlling the pupil diameter? (Which nervous system is “Acetylcholinergic"?) a. Somatosensory nervous system b. Sympathetic nervous system c. Reticular attenuating nervous system d. Parasympathetic nervous systemarrow_forwardEmergency room doctors often shine a light into the eyes of patients with potential trauma to the brain to test their pupillary reflex. This is an important method in determining possible damage in the following areas of the nervous system, EXCEPT the a. sensory neuron and motor neuron b. interneuron c. optic nerve and circular muscle of iris d. occipital lobearrow_forward
- Benign Paroxysmal Positional Vertigo is a disorder where some of the calcium carbonate crystals in the utricle migrate into the semicircular canals. Why does this condition cause periods of dizziness? a. The hair cells in the semicircular canals will be constantly activated. b. The hair cells in the semicircular canals will now be stimulated by gravity. c. The utricle will no longer recognize acceleration. d. There will be too much volume in the semicircular canals for them to detect motion.arrow_forwardKnowing what you know about the anatomy of the eyeball, why do you suppose untreated glaucoma (excess aqueous humor production) causes blindness? Group of answer choices a. The excess aqueous humor compresses the optic nerve b. Intraocular pressure increases and the vitreous body presses against the lens c. The fluid accumulation causes the choroid to separate from the sclera d. The buildup of aqueous humor causes the vitreous body to press against the retina and disrupt its blood supply leading to cell death e. Aqueous humor is not reabsorbed as quickly as it is producedarrow_forward__________ are tactile receptors that are located just beneath the skin and respond to changes in pressure. a. Oligodendrocytes c. Tactile interneurons b. Free nerve endings d. Pacinian corpusclesarrow_forward
- what statements are false about Balance a. Static balance evaluates the position of the head relative to gravity and detects linear acceleration and deceleration. b. The utricle and saccule in the inner ear contain maculae. c. The maculae consist of hair cells with the hairs embedded in a gelatinous mass that contains otoliths. d. The gelatinous mass moves in response to gravity.arrow_forwardNight vision begins with stimulation of_______ . a. hair cells c. cone cells b. rod cells d. neurogliaarrow_forwardWhich of the following is a direct target of the vestibular ganglion? a. superior colliculus b. cerebellum c. thalamus d. optic chiasmarrow_forward
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The Sensorimotor System and Human Reflexes; Author: Professor Dave Explains;https://www.youtube.com/watch?v=M0PEXquyhA4;License: Standard youtube license