Physiology Exam 3 05/04/2016 Which plexus provides motor and sensory innervation to the upper limb? brachial plexus sacral plexus cranial plexus lumbar plexus Which special sense does NOT travel through the thalamus at any point in its transmission? vision olfaction hearing gustation Control of skeletal muscle is the responsibility of: a postganglionic neuron. a preganglionic neuron. a somatic motor neuron. an autonomic ganglion. Potentially damaging stimuli that result in pain are selectively detected by: chemoreceptors. nociceptors. photoreceptors. proprioceptors. Eight-year-old Cate stood by her mother’s bed, watching her sleep and perplexed by the rapid movement of her mother’s eyes beneath the eyelids. We know Cate’s mother was experiencing stage III sleep by what Cate witnessed. True False [AdsenseImage] Special senses, such as sight and sound, are detected by: motor neurons. sensory neurons. both cranial nerves and spinal nerves. special cells that transduce stimuli into electrical signals. What best characterizes the function of the parasympathetic nervous system? The parasympathetic nervous system maintains homeostasis when the body is at rest. The parasympathetic nervous system prepares the body for physical activity. The parasympathetic nervous system prepares the body for emergency situations. The parasympathetic nervous system is the “fight or flight” system. Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated: hyperpolarization. temporal summation. impulse transmission. spatial summation. After eating a large meal, Mr. Davis felt sleepy. Which nervous system dominates? somatic nervous system sympathetic nervous system parasympathetic nervous system systemic nervous system What part of the motor pathway inhibits inappropriate movements? cerebellum basal nuclei primary motor cortex occipital lobe Where does each half of the visual field get segregated so that it reaches the opposite hemisphere of the brain? lateral geniculate nucleus occipital lobe optic chiasma hypothalamus [AdsenseImage] Which of the following carries sensory information only? posterior (dorsal) root anterior ramus posterior ramus anterior root Damage to the basal cells in the olfactory epithelium results in a loss of: smell. vision. hearing. taste. What type of neuron is found within the CNS to perform the job of information processing? interneurons (association neurons) motor (efferent) neurons sensory (afferent) neurons bipolar neurons Damage to the facial nerve would result in a loss of taste sensation from: roof of the mouth. base of the tongue. anterior two-thirds of the tongue. posterior one-third of the tongue. Resting membrane potential is maintained by the Na+/K+ pump which brings: three potassium ions into the cytosol and two sodium ions into the extracellular fluid. three potassium ions into the cytosol and three sodium ions into the extracellular fluid. two potassium ions into the cytosol and three sodium ions into the extracellular fluid. two potassium ions into the cytosol and two sodium ions into the extracellular fluid. What is responsible for keeping blood vessels partially constricted at all times? somatic control sympathetic tone cerebral cortex control parasympathetic tone Place these steps of the action potential in the correct order. 1. Sodium ions channels return to the resting state and repolarization continues. 2. Voltage-gated sodium ion channels activate, sodium ions enter, and the axon section depolarizes. 3. As potassium ion channels return to resting state, the axolemma may hyperpolarize before returning to the resting membrane potential. 4. A local potential depolarizes the axolemma of the trigger zone to threshold. 5. Sodium ion channels inactivate, and voltage-gated potassium ion channels activate, so sodium ions stop entering and potassium ions leave, beginning repolarization. 4, 2, 3, 5, 1 2, 4, 5, 1, 3 4, 2, 5, 1, 3 4, 2, 1, 3, 5 An inability to swallow indicates a problem with the: trochlear nerve (IV) or abducens nerve (VI). trigeminal nerve (V) or glossopharyngeal nerve (IX). accessory nerve (XI) or hypoglossal nerve (XII). olfactory nerve (I). Loss of balance and equilibrium can indicate damage to the: accessory nerve (XI). vestibulocochlear nerve (VIII). trochlear nerve (IV). hypoglossal nerve (XII). Damage to the splanchnic nerves would affect functioning of the: urinary bladder. eye. lungs. heart. What brain region is responsible for learning, memory, and personality? cerebellum diencephalon cerebrum brainstem Aiden was surprised to learn that his salad dressing contained glucose since it did NOT taste: bitter. sweet. sour. salty. [AdsenseImage] When you bend your head, gravity pulls on the otolithic membrane, bending the stereocilia either toward or away from the kinocilium. True False What cranial nerves are involved in the sensory and the motor roles for the corneal blink reflex? trigeminal nerve (V) as sensory; facial nerve (VII) as motor optic nerve (II) as sensory, oculomotor nerve (III) as motor glossopharyngeal nerve (IX) as sensory, oculomotor nerve (III) as motor trochlear nerve (IV) as sensory, abducens nerve (VI) as motor What would most likely lead to an IPSP? opening of sodium ion channels closure of chloride ion channels opening of calcium ion channels opening of potassium ion channels Nicotinic and muscarinic receptors are classified as: cholinergic receptors. beta receptors. alpha receptors. adrenergic receptors. Which of the following is an effect of myelination? Myelination increases the speed of conduction of action potentials. Myelination increases the rate at which phagocytosis occurs in the brain. Myelination increases the rate of mitosis in damaged neurons. Myelination increases the volume of cerebrospinal fluid in circulation. What do you expect to see if the activity of the reticular formation is decreased? decreased level of consciousness fever increased level of consciousness increased metabolism Mechanoreceptors might detect which of the following sensations? light temperature smell pressure What best describes a converging circuit? One neuron communicates with multiple parts of the brain. An increasing number of neurons are excited down the pathway of the circuit. Axon terminals from multiple input neurons join onto a single postsynaptic neuron. One axon of an input neuron branches to make contact with multiple postsynaptic neurons. Which nervous system division is responsible for the integration of sensory information? visceral motor division somatic motor division peripheral nervous system central nervous system Most organs are innervated from both the sympathetic and parasympathetic nervous systems, referred to as: antagonism dual innervation sympathetic tone parasympathetic tone [AdsenseImage] Astrocytes and tight junctions create a barrier to viruses and bacteria known as: dural sinuses. meninges. choroid plexues. the blood-brain barrier. Using the information provided in this graph, which statement best summarizes the activity in this neuron? Sonic Positive charges are lost from the cell, making the inside more negative. The cell gains chloride ions, making the cell hyperpolarize. The cells gains negative charges, making the inside more negative. The cell gains positive charges, making the inside less negative. Where does the conscious awareness of sound begin, along with the analysis of its pitch, location, and loudness? temporal lobe parietal lobe frontal lobe occipital lobe sd Terrible! Rick’s Steakhouse As an Amazon Associate we earn from qualifying purchases through some links in our articles.
