Flashcards › A&P - Nervous System

Which of the following are functions of the nervous system? sensory receptors monitor changes inside & outside of the body – sensory, input centers process, interpret, and make decisions about information, and effectors activate muscles and glands to take action – motor output The term central nervous system refers to the: brain and spinal cord Which of these neuroglial cells forms the myelin sheath in the central nervous system: oligodendrocytes _____________ or afferent neurons carry information towards the central nervous system: sensory The major role of the interneuron is to: connect motor and sensory neurons in their pathways The neuron processes that normally receive incoming stimuli are called: dendrites The two major functional properties of neurons are: irritability and conductivity What is located in cell bodies: nuclei During the resting state, a neuron is: polarized with sodium ions outside the cell and potassium ions inside the cell A nerve impulse starts at the ________ and ends at the __________. dendrites, axon terminals 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 while sodium is actively transported out of the cell 2, 1, 4, 3 The gap between two communicating neurons is termed: synaptic cleft A Chemical messenger that carries information between two neurons are called: Neurotransmitter Which of the following is the correct sequence in a typical reflex arc: receptor, sensory neuron, integration center, motor neuron, effector Which type of reflex involves skeletal muscles: somatic Which of the following protects the CNS from disease? microglia A stroke in the primary motor area has caused Don to lose control over his skeletal muscles on the right side of his body. What lobe of his brain was damaged: frontal lobe 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 speak is the: Broca's area The midbrain, pons, and medulla oblongata are housed in the: brain stem Control of temperature, endocrine activity, metabolism, and thirst are functions associated with the: hypothalamus Which one of the following represents the correct sequence from outermost to innermost layers of the meninges: dura mater, arachnoid mater, pia mater _______ is the ability to respond to stimuli, generate and conduct a nerve impulse. _________ is the ability to transmit nerve impulses to other neurons, muscles, and glands. Irritability, conductivity True/False: The collection of spinal nerves at the inferior end of the spinal cord is called the cauda equina. True True/False: Complex networks of spinal nerves are termed nerve plexuses. True List and explain the one of the three general functions of the nervous system Sensory (input) function; the nervous system uses millions of sensory receptors to monitor changes (stimuli) inside and outside the body; the gathered information is called the sensory function. Explain the steps in the nerve impulse 1. Neuron membrane maintains resting potential 2. Threshold stimulus is received 3. Sodium channels open 4. Sodium ions diffuse inward, depolarizing the membrane 5. Potassium channels open 6. Potassium ions diffuse outward, repolarizing the membrane 7. The resulting action potential causes a local bioelectric current that stimulates adjacent portions of the membrane. 8. Wave of action potentials travel the length of the axon as a nerve impulse List and explain the second of the three general functions of the nervous system Integrative function; the nervous system processes and interprets sensory input and makes decisions about what should be done and the magnitude to which it should be done at each moment. List and explain the third of the three general functions of the nervous system Motor (output) function; the process of reaction to stimuli; the body responds by activating muscles that can produce motion or glands that can produce and secrete hormones. Review for the nervous system test

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