Froggy Jumps Nervous System & Special Senses QuizOnline version Nervous system basics by Yvette Joy Dumalhin 1 What carries signals away from a neuron cell body to other neurons or muscles? a Dendrite b Axon c Synapse 2 Which part of the CNS coordinates balance and posture? a Medulla oblongata b Cerebrum c Cerebellum 3 Which brain lobe processes visual information? a Temporal lobe b Occipital lobe c Frontal lobe 4 What is the junction between two neurons where chemical signals are released? a Synapse b Neurolemma c Axon hillock 5 Which CNS neuroglial cell helps maintain the blood-brain barrier and anchors neurons to blood vessels? a Schwann cells b Ependymal cells c Astrocytes 6 Which PNS neuroglial cell forms myelin sheaths around a single axon segment? a Oligodendrocyte b Schwann cell c Satellite cell 7 Which eye structure focuses light onto the retina? a Lens b Cornea c Iris 8 Which cells in the retina detect color and fine detail? a Ganglion cells b Rods c Cones 9 What organ detects ligaments and motions in the vestibular system for balance? a Otic nerve b Cochlea c Vestibular apparatus 10 Which statement best describes an action potential? a It is produced only by inhibitory neurotransmitters b It is a small localized change that decays with distance c It is an all-or-none signal that propagates without decrement 11 Which neurotransmitter is identified as the principal excitatory neurotransmitter in the CNS? a Glutamate b Serotonin c GABA 12 The phrenic nerve arises from which plexus? a Cervical plexus b Brachial plexus c Lumbar plexus 13 Which statement correctly describes the somatic nervous system? a It uses a single motor neuron to skeletal muscle and acetylcholine exclusively b It primarily regulates smooth muscle and cardiac muscle c It controls glands using a two-neuron chain 14 Taste from the anterior two-thirds of the tongue is carried primarily by which cranial nerve? a CN VII b CN IX c CN VIII 15 Which eye tunic includes the choroid, ciliary body, and iris? a Vascular tunic b Fibrous tunic c Neural tunic 16 Which structure vibrates in response to sound pressure waves? a Tympanic membrane b Basilar membrane c Oval window 17 The auditory (Eustachian) tube normally opens during swallowing or yawning to: a equalize pressure across the tympanic membrane b increase vestibular sensitivity c produce endolymph 18 What is the action of the sphincter pupillae muscle? a Constricts the pupil during parasympathetic stimulation b Dilates the pupil during sympathetic stimulation c Moves the lens forward 19 The sympathetic division is also known as the: a fight-or-flight division b rest-and-digest division c feed-and-breed division 20 Which cranial nerve carries smell information? a CN I b CN II c CN III 21 The sympathetic division typically has short preganglionic fibers and long postganglionic fibers. a True b False c Not sure 22 Oligodendrocytes form myelin sheaths around axons in the peripheral nervous system. a False b True c Not sure 23 A blocked nose can dull flavor even when taste buds are intact because retronasal olfaction contributes to flavor perception. a True b False c Not sure 24 The vagus nerve primarily carries visceral sensory information from thoracic and abdominal organs. a True b False c Not sure 25 The organ of Corti is located in the middle ear cavity. a False b True c Not sure
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