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Exam 4
Anatomy & Pysiology 1 Exam 4
| Question | Answer |
|---|---|
| Efferent nerve fibers may be described as motor nerve fibers T/F | true |
| Myelination of the nerve fibers in the central nervous system is the job of the oligodendrocyte T/F | true |
| During depolarization, the inside of the neurons membrane becomes less negative T/F | true |
| If bacteria invaded the CNS tissue, microglia would migrate to the area to engulf and destroy them. | true |
| Which of the following is not a function of astrocytes? | provide defense for the CNS |
| Which of the choices below describes the ANS | motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle and glands |
| What are ciliated CNS neuroglia that can play an active role in moving the cerebrospinal fluid called? | ependymal cells |
| The sheath of Schwann is also called the | myelin sheath |
| The period after an initial stimulus when a muscle cell is not sensitive to another stimulus is the | absolute refractory period |
| Which of the following is not a special characteristic of mature neurons? | they are mitotic |
| The part of the neuron that conducts impulses away from its cell body is called _____ | axon |
| An impulse from one nerve cell is communicated to another nerve cell via the __ | synapse |
| Which of the following is not a function of the autonomic nervous system? | innervation of skeletal muscle |
| The term central nervous system refers to the | brain and spinal cord |
| The substance released at axon terminals to propagate a nervous impulse is called _____ | neurotransmitter |
| A neuron that has its primary function the job of connecting other neurons is called ___ | association neuron |
| Why does a hypertension phase generally follow a repolarization phase in action potential? | The hypertension is the response to the stimulus, repolarization. Repolarization is resting for the next hyperpolarization phase |
| Preparing the body for the "fight or flight" response is the role of the ____ | sympathetic nervous system |
| The somatic and automatic nervous systems differ in all of the following except | all of the neurotransmitters |
| The "resting and digesting" division of the automatic nervous system is the ___ | parasympathetic division |
| Control of temperature, endocrine activity, and thirst are functions associated with the ___ | hypothalamus |
| Which of these effectors is not directly controlled by the autonomic nervous system? | skeletal muscle |
| The sympathetic division is often casually referred to as the ______ | fight or flight |
| Which of the following statements concerning the brainstem is true? | damage to the brainstem is usually fatal |
| In the CNS, clusters of gray matter containing cell bodies are called | nuclei |
| Which of the following is correctly associated with the medulla oblongata? | it relays sensory information |
| The fact that the right side of the brain controls the left side of the body is explained by the | division of the cerebellum into two hemispheres |
| The pyramids of the medulla contain | ascending sensory tracts |
| Which portion of the brain stem is continuous with the spinal cord? | medulla oblongata |
| A patient with a traumatic head injury may exhibit vomiting as a result of irritation of nuclei in the | Medulla oblongata |
| A small lesion on the brainstem which resulted in a rapid heart rate, intense vasoconstriction, and elevated blood pressure would probably be located in the | medulla oblongata |
| The part of the brain that connects the medulla to the midbrain is the | pons |
| Which two portions of the brain are involved in controlling respiration? | pons, hypothalamus |
| The sleep/wake cycle is influenced by the | reticular formation |
| The reticular formation | maintains alertness and attention |
| The cerebellum communicated with other parts of the CNS by means of nerve tracts called the | cerebellar peduncles |
| The white matter of the cerebellum forms a branching network known as the | arbor vitae |
| The portion of the cerebellum that is involved in balance and eye movements is the | vermis |
| The stalk that connects the hypothalamus to the hypophysis (pituitary gland) is the | infundibulum |
| Most sensory input that ascents through the spinal cord and brainstem projects to the | thalamus |
| The mammillary bodies | are involved in emotional responses to oders |
| An individual who has an eating disorder along with intense thirst and wildly varying body temperatures may have a dysfunction of the | hypothalamus |
| Which of the following feelings is not related to hypothalamic function | feeling satiated after a meal |
| The pineal body | appears to play a role in controlling the onset of puberty |
| The cerebral gyri increase | the surface area of the cortex |
| The central sulcus separates the | frontal and partial lobes |
| During brain surgery, the superior portion of the postcentral gyrus of a patient is stimulated. The patient is most likely to | smile |
| If an animal has had its cerebrum removed, it cannot | live |
| The limbatic system | is a memory area in the mid brain |
| The central nervous system develops from a flat mass of tissue called the neural | tube |
| The size of various regions of the somatic sensory cortex is proportional to the ______ sensory receptors in the area of the body | number of |
| Which of the following functions is most likely to be preformed by the visual association area? | "recognizes" the face of a close friend |
| Damage to Wernicke's area would result in | "seeing stars" |
| If Broca's area is damaged, the result is | inability to think of things to say |
| A patient has suffered a cerebral hemorrhage that has damaged the primary motor area of his right cerebral cortex. As a result the | patient cannot voluntarily move his left arm or leg |
| Mike who is left handed decided to wear his favorite t-shirt to his anatomy class. On his t-shirt were the words "only left handed people are in their right minds" What does this statement mean? | This means that left handed people are controlled by the right side of the brain. |
| What does lateralization of cortical functioning mean? | we use both cerebral hemispheres for almost every activity, and the hemisphere appear nearly identical. there is a division of labor, and each hemisphere has a uniqueabilities not shared by its partner. |
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