Nervous System (Multiple Choice Questions) Correct Solutions

B - ANSWER The gap between two communicating neurons is termed: A) node of Ranvier B) synaptic cleft C) effector D) cell body E) Schwann cell C - ANSWER The area of the brain stem that plays a role in consciousness and the awake/sleep cycles is the: A) cerebellum B) thalamus C) reticular activating system (RAS) D) pineal gland E) limbic system E - ANSWER A neuron with a cell body located in the CNS whose primary function is connecting other neurons is called a(n): A) efferent neuron B) glial cell C) afferent neuron D) satellite cell E) association neuron B - ANSWER Afferent nerves are called __________, and motor nerves are called __________. A) peripheral nerves; cranial nerves B) sensory nerves; efferent nerves C) cranial nerves; peripheral nerves D) motor nerves; sensory nerves E) mixed nerves; motor nerves D - ANSWER Loss of muscle coordination results from damage to the: A) hypothalamus B) cerebrum C) midbrain D) cerebellum E) thalamus D - ANSWER The olfactory area is found within the: A) occipital lobe B) parietal lobe C) frontal lobe D) temporal lobe E) pyramidal tract D - ANSWER The sciatic nerve is the largest nerve in the body resulting from a combination of which two nerves: A) pudendal and femoral nerves B) pudendal and common peroneal nerves C) pudendal and tibial nerves D) common fibular and tibial nerves E) femoral and tibial nerves D - ANSWER The substance that is released at axonal endings to propagate a nervous impulse is called: A) an ion B) an action potential C) the sodium-potassium pump D) a neurotransmitter E) nerve glue E - ANSWER Impulse conduction is fastest in neurons that are: A) sensory B) unmyelinated C) cerebral D) motor E) myelinated A - ANSWER 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) arachnoid mater, dura mater, pia mater D) dura mater, pia mater, arachnoid mater E) pia mater, arachnoid mater, dura mater A - ANSWER The diffusion of potassium ions out of a neuron causes it to experience: A) repolarization B) an action potential C) a nerve impulse D) a graded potential E) depolarization B - ANSWER Damage to this nerve results in ʺwristdrop,ʺ the inability to extend the hand at the wrist: A) obturator B) radial C) axillary D) phrenic B - ANSWER 35) Which of the following is a traumatic brain injury: A) aphasia B) cerebral edema C) cerebrovascular accident (CVA) D) Parkinsonʹs disease E) Alzheimerʹs disease A - ANSWER The peripheral nervous system consists of: A) the spinal and cranial nerves B) the brain and spinal cord C) spinal nerves only D) cranial nerves only E) the brain only E) femoral B - ANSWER The neuron processes that normally receive incoming stimuli are called: A) Schwann cells B) dendrites C) neurolemmas D) satellite cells E) axons E - ANSWER The cerebrospinal fluid: A) enters the four ventricles after filling and circulating through the subarachnoid space B) is secreted by the arachnoid villi C) is identical in composition to whole blood D) is secreted mostly by the ependymal cells lining the brain ventricles E) is continually formed mostly by the choroid plexuses E - ANSWER The term central nervous system refers to the: A) spinal cord and spinal nerves B) autonomic and peripheral nervous systems C) brain, spinal cord, and cranial nerves D) brain and cranial nerves E) brain and spinal cord D - ANSWER Which one of these effectors is NOT directly controlled by the autonomic nervous system: A) smooth muscle B) cardiac muscle C) most glands D) skeletal muscle E) abdominal organs D - ANSWER In contrast to the somatic nervous system, the autonomic nervous system: A) stimulates its effector cells B) has centers in the brain and spinal cord C) has both afferent and efferent fibers D) has two motor neurons E) has two afferent neurons C - ANSWER Which of the following is the correct sequence in a typical reflex arc: A) receptor, afferent neuron, efferent neuron, integration center, effector B) effector, efferent neuron, integration center, afferent neuron, receptor C) receptor, afferent neuron, integration center, efferent neuron, effector D) effector, afferent neuron, integration center, efferent neuron, receptor E) receptor, efferent neuron, integration center, afferent neuron, effector C - ANSWER The ability to respond to a stimulus is termed: A) polarized B) depolarized C) irritability D) all-or-none response E) conductivity C - ANSWER Which of the following effects is characteristic of the parasympathetic nervous system: A) increases metabolic rate