Exam 2 HW
The part of the neuron that typically conducts nerve impulses away from the cell body is the ________. A. axon B. synaptic cleft C. cell body D. dendrite
A. axon
What division of the autonomic nervous system is often called the "rest-and-digest" division? A. sympathetic B. afferent C. parasympathetic D. somatic
C. parasympathetic
What part of a neuron receives signals and sends a message to the cell body? A. dendrite B. axon terminal C. axon hillock D. axon
A. dendrite
Which one of the following represents the correct sequence from outermost to innermost layers of the meninges? A. dura mater, arachnoid mater, pia mater B. pia mater, dura mater, arachnoid mater C. pia mater, arachnoid mater, dura mater D. arachnoid mater, dura mater, pia mater E. dura mater, pia mater, arachnoid mater
A. dura mater, arachnoid mater, pia mater
Which of the following structures refract light before it hits the retina? A. lens only B. cornea, humors, and lens C. pupil D. cornea and lens only
B. cornea, humors, and lens
The small, peglike projections of the tongue's surface are called ________. A. otoliths B. papillae C. maculae D. basal cells
B. papillae
The largest nerve in the body, the sciatic nerve, belongs to the ________ nerve plexus. A. lumbar B. sacral C. cervical D. brachial
B. sacral
Damage to the facial nerve (cranial nerve VII) will partially impair the sense of ________. A. hearing B. taste C. smell D. static equilibrium E. dynamic equilibrium
B. taste
Which cranial nerve transmits impulses for the senses of hearing and balance? A. glossopharyngeal B. vestibulocochlear C. oculomotor D. hypoglossal E. accessory
B. vestibulocochlear
Which of these structures is part of the system that produces and drains tears? A. lacrimal gland B. tarsal gland C. aqueous humor D. conjunctiva
A. lacrimal gland
What specific receptor cells respond to chemicals dissolved in saliva? A. hair cells B. gustatory cells C. olfactory cells Dt taste bud cells
B. gustatory cells
After repolarization, what ions are pumped out of the cell? A. Potassium B. Calcium C. Sodium D. Both sodium and potassium
C. Sodium
Sally has a brain injury; she knows what she wants to say but can't vocalize the words. The part of her brain that deals with the ability to say words properly is the ________. A. longitudinal fissure B. gyrus C. central sulcus D. primary motor area E. Broca's area
E. Broca's area
Where are the olfactory receptors located? A. Throat B. Inner ear C. Eye D. Tongue E. Nasal cavity
E. Nasal cavity
Which cranial nerve pairs transmit both hearing and equilibrium information to the brain? A. Abducens (VI) B. Trigeminal (V) C. Trochlear (IV) D. Oculomotor (III) E. Vestibulocochlear nerve (VIII)
E. Vestibulocochlear nerve (VIII)
What is the first event of an action potential? A. Sodium gates open and the membrane repolarizes. B. Potassium gates open and the membrane repolarizes. C. Sodium gates open and the membrane depolarizes. D. Potassium gates open and the membrane depolarizes.
C. Sodium gates open and the membrane depolarizes.
Wendy had a few alcoholic drinks, then found walking and maintaining her balance difficult. Which part of her brain was sedated by the alcohol? A. thalamus B. pons C. cerebellum D. hypothalamus E. cerebrum
C. cerebellum
The membrane that covers the outer surface of the eye and lines the eyelids is the ________. A. sclera B. retina C. conjunctiva D. choroid
C. conjunctiva
What must be stimulated in order for the sense of hearing to be transmitted to the cochlear nerve? A. otoliths B. semicircular canals C. hair cells D. cupula E. vestibule
C. hair cells
What type of neuron connects sensory and motor neurons in neural pathways? A. bipolar neurons B. efferent neurons C. interneurons (association neurons) D. afferent neurons
C. interneurons (association neurons)
Which gland is located above the lateral end of each eye and releases tears? A. tarsal B. ciliary C. lacrimal D. ceruminous
C. lacrimal
Which of these lists the components of a reflex arc in the correct sequence? A. receptor; efferent neuron; control center; afferent neuron; effector B. receptor; efferent neuron; effector; afferent neuron; control center C. receptor; afferent neuron; control center; efferent neuron; effector D. receptor; afferent neuron; efferent neuron; control center; effector
C. receptor; afferent neuron; control center; efferent neuron; effector
Which of these is part of the sensory layer of the eye? A. vitreous humor B. ciliary body C. retina D. choroid
C. retina
The fibrous covering of the eye consists of the white outer layer known as the ________, and a transparent portion known as the ________. A. iris; pupil B. pupil; cornea C. sclera; cornea D. conjunctiva; sclera
C. sclera; cornea
The movement of otoliths and bending of hair cells in the inner ear contribute to our sense of ________. A. dynamic equilibrium B. hearing C. static equilibrium D. vibrations
C. static equilibrium
Preparing the body for the "fight-or-flight" response during threatening situations is the role of the ________. A. afferent nervous system B. parasympathetic nervous system C. sympathetic nervous system D. cerebrum E. somatic nervous system
C. sympathetic nervous system
The function of the choroid layer of the eye is to ________. A. release tears onto the anterior surface of the eye B. produce gross eye movements C. refract light and focus it on the retina D. regulate the amount of light entering the eye E. prevent light from scattering inside the eye
E. prevent light from scattering inside the eye
Which layer of the eye contains photoreceptors known as rods and cones? A. sclera B. cornea C. retina D. choroid
C. retina
Which one of the following is the correct sequence of events that correlates to the sequence of events of a nerve impulse? 1. the membrane becomes depolarized 2. sodium channels open and sodium ions diffuse inward 3. the membrane becomes repolarized 4. potassium channels open and potassium ions diffuse outward A. 2, 1, 3, 4 B. 3, 2, 4, 1 C. 4, 1, 3, 2 D. 2, 1, 4, 3 E. 1, 2, 4, 3
D. 2, 1, 4, 3
Support cells in the central nervous system are collectively called ________. A. neuroglia B. microglia C. myelin sheaths D. oligodendrocytes
A. neuroglia
What part of the brain do we use when initiating skeletal muscle movement? A. primary motor area B. premotor area of the frontal lobe C. Broca's area D. primary somatic sensory
A. primary motor area
Dynamic equilibrium receptors that detect information about angular or rotational movements of the head are housed in the ________. A. semicircular canals B. vestibule C. cochlea D. oval window
A. semicircular canals
What ion depolarizes the membrane when it diffuses into the axon of a neuron? A. sodium B. water C. potassium D. chloride
A. sodium
Select the pathway along which images received by the retina of the eye will travel into the brain. A. Optic nerve, optic radiation, optic tracts, hypothalamus, temporal lobe B. Vestibular nerve, optic disc, optic chiasma, optic tracts, thalamus, parietal lobe C. Cochlear nerve, optic disc, optic tracts, thalamus, temporal lobe D. Optic nerve, optic chiasma, optic tracts, thalamus, optic radiation, occipital lobe E. Optic tracts, optic chiasma, optic nerve, thalamus, optic radiation, occipital lobe
D. Optic nerve, optic chiasma, optic tracts, thalamus, optic radiation, occipital lobe
Gustatory hairs are to taste as olfactory hairs are to ________. A. hearing B. sight C. dynamic equilibrium D. smell E. both hearing and dynamic equilibrium
D. smell
Which division of the peripheral nervous system activates skeletal muscles? A. autonomic nervous system B. involuntary nervous system C. sensory division of the peripheral nervous system D. somatic nervous system
D. somatic nervous system
Which branch of the autonomic nervous system (ANS) mobilizes the body during extreme situations, such as rage or fear? A. parasympathetic division B. sensory division C. somatic division D. sympathetic division
D. sympathetic division
Static equilibrium receptors are located in the ________. A. cochlea B. semicircular canals C. tympanic membrane D. auricle (pinna) E. vestibule
E. vestibule