nervous system
Terms
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- -algia
- pain
- -esthesia
- perceive sensations
- -mural
- wall
- -plegia
- paralysis
- a rapid, automatic response to a stimulus
- reflex
- af-
- toward
- afferent
- impulse originates in the periphery and travels to the CNS
- anatomically distinct collection of neuron cell bodies located in the PNS
- ganglion
- aunomic nervious system
- often referred to as "visceral motor system" has two divisions, sympathetic and parasympathetic; consists of fibers that innervate involuntary (smooth) muscle, cardiac muscle, and glands
- axon
- nerve fiber, cytoplasmic process of the cell body
- bundle of axons in the PNS, which are held together by layers of connective tissue
- nerve
- bundle of axons located in the CNS
- tract
- cell body
- part of the neural cell containing the nucleus and other cellular organelles
- cell/organ that is selectively affected by a particular agent
- target tissue
- chemicals released into the synapse that allow transmission of the electrical impulse to another cell; allow communication between cells as the synapse
- neurotransmitters
- CNS tissue that is predominantly myelinated axons; organized into tracts
- white matter
- CNS tissue which contains a predominance of nerve cell bodies and non-myelinated axons
- gray matter
- collection of neuron cell bodies located in the CNS
- nucleus
- complex, interwoven network of peripheral nerves
- plexus
- cytoplasmic processes that extend from the neuron cell body; similar in structure to axons, but typically form a tree-like branching pattern; comprise most of the receptor surface of a neuron
- dendrite
- dendrite
- cytoplasmic processes that extend from the neuron cell body; similar in structure to axons, but typically form a tree-like branching pattern; comprise most of the receptor surface of a neuron
- ef-
- away
- effector organ (tissue)
- organ/ tissue that produces an effect, e.g. contraction or secretion
- from the Greek word soma, which means "body;" transmits sensations of touch, pain, temperature, and proprioception from sensory receptors in skin, mucosa, skeletal muscles and joint capsules; in other words, provides info about the external environment, a
- symatic nervous system
- ganglion
- anatomically distinct collection of neuron cell bodies located in the PNS
- gray matter
- CNS tissue which contains a predominance of nerve cell bodies and non-myelinated axons
- inter-
- between
- intra-
- within
- nerve
- bundle of axons in the PNS, which are held together by layers of connective tissue
- nerve fiber, cytoplasmic process of the cell body
- axon
- neuron
- type of cell specialized to conduct electrical impulses
- neurotransmitters
- chemicals released into the synapse that allow transmission of the electrical impulse to another cell; allow communication between cells as the synapse
- nucleus
- collection of neuron cell bodies located in the CNS
- often referred to as "visceral motor system" has two divisions, sympathetic and parasympathetic; consists of fibers that innervate involuntary (smooth) muscle, cardiac muscle, and glands
- aunomic nervous system
- organ/ tissue that produces an effect, e.g. contraction or secretion
- effector organ (tissue)
- part of the neural cell containing the nucleus and other cellular organelles
- cell body
- plexus
- complex, interwoven network of peripheral nerves
- receptor, sensory neuron, motor neuron, and effector involved in a particular reflex
- reflex arc
- reflex
- a rapid, automatic response to a stimulus
- reflex arc
- receptor, sensory neuron, motor neuron, and effector involved in a particular reflex
- somatic nervous system
- from the Greek word soma, which means "body;" transmits sensations of touch, pain, temperature, and proprioception from sensory receptors in skin, mucosa, skeletal muscles and joint capsules; in other words, provides info about the external environment, a
- specialized site where a neuron communicates with another cell
- synapse
- synapse
- specialized site where a neuron communicates with another cell
- target tissue
- cell/organ that is selectively affected by a particular agent
- tract
- bundle of axons located in the CNS
- type of cell specialized to conduct electrical impulses
- neuron
- white matter
- CNS tissue that is predominantly myelinated axons; organized into tracts
- what is the functional unit of hte nervous system
- neurons
- Sensory neurons carry information to or away from the Central Nervous System
- to
- Motor neurons carry info to or away from teh Central Nervous System
- away
- Effectors within the body are ____ and ____. They respond directly to which type of neuron info?Sensory or motor
- Muscles and Glands; Motor
- Define an action potential
- Rapid change in charge at one point on the axon membrane. an electrical signal that travels down the axon. If hte sum total is negative, no action potential is generated.
- What is the resting membrane potential in mV
- -70 mV
- Fiber that carries info away from the cell body
- axon
- house the nucleus and it integrates processes the incoming info
- cell body
- fiver that receives incoming messages
- dendrite
- insulatin material produced by schwann cells
- myelin sheath
- Repolarization (+30mV to -70mV)
- K+ out of cell
- Depolarization (-50 to +30mV)
- Na+ into cell
- True or False. ACtion potentials come in diff strenths..some weak and some strong.
- false. must be positively charged
- When do gated soidum channels open?
- after depolarization
- myelinated fibers carry information faster or slower
- faster
- true or false. the neuron creates the myelin sheath.
- False. schwann cells
- The area where a neuron communicates with another cell
- synapse
- Where would you find neurotransmitters stored in vesicles?
- presynaptic membrane
- Where would you find receptors for neurotransmitters
- postsynaptic membrance
- Neurotransmitters are the _____ of the nervous system.
- chemical information. over 25 known to work int eh human body. may be excitatory or inhibitory.