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Question: 12-1 The 2 major anatomical subdivisions of the system are:Answer: Central system (cns) and Peripheral nervous system (pns) Question: 12-1 The nervous system (cns)consists of:Answer: the brain and spinal Question: 12-1 the primary function(s) of the system include: Answer: a. providing sensation of the internal and external enviromnents b.integrating information c. regulating and controlling peripheral structures and systems Question: 12-2 neurons are for:Answer: information transfer and processing in the nervous Question: 12-2 The of a neuron with voltage-gated sodium channels is the:Answer: Axon Question: 12-2 Neurons are on the basis of the structure as:Answer: ,unipolar,bipolar,multipolar Question: 12-2 are classified on the basis of their function as:Answer: motor(efferent),sensor(afferent), (interneurons) Question: 12-3The two major cell of neural tissue are:Answer: and neuroglia Question: 12-3 the of glial cells in the central nervous system are:Answer: 1. Astrocytes 2. Oligodendrocytes 3.Microglia 4. cells Question: 12-3 The neuroglia that play a role in organization by tying clusters of axons together are the :Answer: Question: 12-4 of the membrane will shift the membrane potential toward:Answer: 0 Question: 12-4 The resting membrane (RMP) of a typical neuron is:Answer: -70 Question: 12-5 If resting membrane potential is -70 mV and the threshold is -60 mV, a potential of -62 mV will:Answer: not produce an potential Question: 12-5 At the site of an action the membrane contains:Answer: An excess of positive ions and an excess of negative ions outside. Negative w/iNside and pOsitive w/the Outside Question: 12-5 If the resting membrane potential is -70 mV, a membrane is:Answer: -80 Question: 12-6 a node along the axon represents an area where is:Answer: an absence of Question: 12-6 The the diameter of the axon:Answer: The faster an action potential will be . like monster cable for a stereo. Question: 12-6 The two most factors that determine the rate of action potential conduction are:Answer: the presence or of a myelin steath and the diameter of the axon Question: 12-7 At an electrical synapse, the presynaptic and postsynaptic membranes are together at:Answer: gap Question: 12-7 chemical synapses differ from electric synapses, because chemical :Answer: a neurotransmitter Question: 12-7 the effect of a on the postsynaptic membrane depends on the:Answer: of the receptor Question: 12-7 Exocytosis and the release of acetylcholine into the synaptic is triggered by:Answer: calcium ions flooding into the Question: 12-7 The normal stimulus for neurotransmitter release is the of the synaptic knob by the:Answer: of an action potential Question: 12-8 or hyperpolarizing CNS neurotransmitters include:Answer: and serotonin Question: 12-9 An excitatory postsynaptic (EPSP)is:Answer: a produced by the arrival of a neuro-transmitter Question: 12-9 an inhibitory potential(IPSP) is a:Answer: transient hyperpolarization of the membrane Question: 12-9 Compounds that have an indirect effect on potential work through intermediaries known as:Answer: messengers Question: 12-9 The reason(s) that active neurons need ATP is to :Answer: A.the synthesis, release, and recycling of neurotransmitter molecules B.the from action potentials C.The movement of materials to and from the soma via axoplasmic flow Question: 12-9 Sensory neurons are responsible for carrying :Answer: to the Question: 12-9 Interneurons, or associated neurons, differ from and motor neurons because of their:Answer: exclusive location in the brain and cord Question: 12-9 Efferent pathways consist of axons that carry :Answer: away from the Question: 12-9 potentials that develop in the postsynaptic membrane in response to a neurotransmitter are:Answer: potentials Question: 12-9 The addition of stimuli occurring in succession is:Answer: temporal Question: The visceral motor system that provides automatic,involuntary regulation of smooth and cardiac muscle and glandular secretions is the _____________.Answer: nervous system Question: The "branches" that enable a single neuron to communicate with several other cells are called ___________.Answer: Question: Sensory information is brought to the CNS by means of the ________ fibers.Answer: Question: In times of infection or injury the type of neuroglia that will increase in numbers is __________.Answer: Question: The sum of all the chemical and electrical forces active across the cell membrane is known as the __________.Answer: electrochemical Question: An action potential occurs only if the membrane is depolarized to the level known as __________.Answer: Question: The process that conducts impulses along a myelineated axon at a high rate of speed is called ________ conduction.Answer: Question: The type of synapse where direct physical contact between the cells occurs is a(an) ____________.Answer: Question: The neuromuscular junction is a synapse where the postsynaptic cell is a(an)________.Answer: skeletal muscle Question: Chemical synapses that release that neurotransmitter acetycholine are known as _________ synapses.Answer: Question: Chemical synapses that release the neurotransmitter norepinephrine are known as ___________ synapses.Answer: Question: Compounds that influence the postsynaptic cells' response to a neurotransmitter are called _____________.Answer: Question: Addition of stimuli occurring in rapid succession at a single synapse is called ____________.Answer: summation Question: Addition of stimuli arriving at different location of the nerve cell membrane is called ____________.Answer: spatial Question: Sensory neurons that monitor the position of skeletal muscles and joints are called ____________.Answer: Question: The spread of nerve impulses from one neuron to several neurons is called ____________.Answer: Question: A graded hyperpolarization of the postsynaptic membrane is referred to as a(n) ____________.Answer: Question: nervous systemAnswer: control Question: autonomic systemAnswer: involuntary Question: Answer: action potentials Question: sensory neuronsAnswer: Question: somatic sensory Answer: Question: neurogliaAnswer: supporting brain Question: blood-brain barriersAnswer: Question: channel inactivationAnswer: +30 Question: membrane potential (neuron)Answer: -70 Question: ion movementAnswer: repolarization Question: unmyelinated Answer: conduction Question: of RanvierAnswer: saltatory Question: electrical Answer: gap Question: norepinephrineAnswer: adrenergic Question: GABAAnswer: inhibitory Question: CNS Answer: Question: second Answer: cAMP Question: EPSPAnswer: Question: summationAnswer: simultaneous multiple Question: The anatomical division of the system responsible for integrating, processing and coordinating sensory information is the:Answer: (CNS) nervous system Question: Interneurons are for:Answer: analysis of sensory inputs and coordination of outputs Question: A long process capable of propagating an action potential is the:Answer: Question: The type of that surround the nerve cell bodies in peripheral ganglia are:Answer: satellite Question: Schwann cells are glial responsible for:Answer: a myelin layer around peripheral axons Question: When a barrier the movement of opposite charges toward one another, a(an):Answer: potential may exist Question: The membranous wrapping of electrical insulation, myelin, aroun an axon is responsible for: Answer: increasing the speed at which an action potential travels along an Question: The simplest form of information in the nervous system is:Answer: the integration of stimuli at the level of the individual Question: During the relative refractory a larger-than-normal depolarizing stimulus can:Answer: a second action potential Question: Saltatory conducts impulses along an axon:Answer: five to times faster than continuous conduction Question: In type C fiber action potentials are conducted at speeds of :Answer: 2 mph Question: The the diameter of the axon, the:Answer: the rate of transmission Question: Facilitation in the neuron's transmembrane refers to:Answer: a shift to theshold Question: Sensory neurons that provide information about the external envirnment the sense of sight,smell,hearing, and touch are called:Answer: Question: the main functional difference between the nervous system and the somatic nervous system is that the activities of the ANS are:Answer: primarily involuntary or "automatic" control Question: and IPSPs reflect the activation of different types of chemically gated channels, producing:Answer: opposing effects on the transmembrane Question: If one EPSP depolarizes the initial segment from a resting potential of -70mV to -65mV, and is at -60mv:Answer: an potential will not be generated Question: presynaptic facilitation to the:Answer: Calcium channels remaining open for a longer period, thus increasing the amount of released Question: The cytoplasm that surrounds a neuron's nucleus is referred to as the _____________.Answer: Question: Nerve cell bodies in the PNS are clustered together in masses called__________.Answer: Question: Movement of charges, such as ions, is referred to as ___________.Answer: Question: The potential difference that exists across a membrane or other barrier is expressed as a(n) _____________.Answer: Question: Ion channels that open or close in response to specific stimuli are called __________ channels.Answer: -regulated Question: The loss of positive ions, which causes a shift in the resting potential to -80mV or more, is referred to as __________.Answer: Question: An action potential traveling along an axon is called a(n) ___________.Answer: nerve Question: The small phagocytic cells that occur in increased numbers in infected and damaged areas of the CNS are called _______.Answer: Question: Axons extending from the CNS to a ganglion are called __________.Answer: preganglionic Question: Axons connecting the ganglionic cells with peripheral effectors are known as __________.Answer: postganglionic Question: Neurons that may be situated betwen sensory and motor neurons are called __________ neurons.Answer: Question: If a synapse involves direct physical contact between cells, it is termed electrical; if the synapse is termed chemical it involves a _________.Answer: Question: the addition of stimuli that arrive at a single synapse in rapid succession is called ___________.Answer: summation Question: Collections of nerve bodies in the CNS are termed ____________.Answer: Question: The axonal bundles that make up the white matter of the CNS are called _________.Answer: |
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