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Estrella Valdez period 6 - Coggle Diagram
Estrella Valdez period 6
Divisions
Parasympathetic division: active under normal, restful conditions (rest and digest).
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subdivisions
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Peripheral nervous system (PNS):
nerves that connect the CNS to body parts, Contains sensory and motor divisions. Cranial nerves, arising from the brain, and spinal cranial nerves, arising from the brain, and spinal
tissues
Neuroglia (glial cells, “nerve glue”) are cells that support neurons.fill spaces, structurally support, protect, and insulate neurons.
Neuron contains a cell body, tubular cytoplasm-filled dendrites, and a tubular, cytoplasm-filled axon.Dendrites conduct impulses toward the cell body.
neurons: ells that communicate, via electrical impulses, with other neurons or other tissues.
postganglionic: fiber (axon) leaves an autonomic ganglion, and innervates a visceral effector.
preganglionic: leaves the CNS, and synapses with
one or more neurons,
Bipolar neurons have 2 processes extending from the cell body, a dendrite and an axon;
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brain
occuiptol lobe: visuospatial processing, distance and depth perception, and color determination
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Frontal lobe : emotional expression, problem solving, memory, language,
Thalamus: role in pain sensation, attention, alertness and memory.
Cerebullum: coordinate muscle movements, maintain posture, and balance.
Brainstem: performs many automatic functions such as breathing, heart rate, and body temperature
spinal cord: transmit impulses to and from the brain, and to house spinal
reflexes. 31 segments, each of which connects to a pair of spinal
nerves.
Lumbar enlargement: thickened region near the bottom of the spinal cord/ rise to nerves that serve the lower limbs
Cauda equina: formed where spinal cord tapers to a point inferiorly/ Consists of spinal nerves in the lumbar & sacral areas
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action poteional: Action potential either occurs or does not. Action potentials of a neuron are all of the same strength. action potential is reached, cell responds by returning to resting
nerve impulse: An action potential at the trigger zone causes an electrical current to flow to adjacent regions of the axon’s membrane.
cranial nerve: Twelve pairs of cranial nerves arise from the underside of the
brain/containing sensory & motor nerve fibers.12 pairs are designated by number and name
spinal nerve: 31 pairs of spinal nerves arise from spinal cord/first pair are mixed nerves.8 pairs of cervical nerves, 12 pairs of thoracic nerves, 5 pairs of lumbar nerves, 5 pairs of sacral nerves and 1 pair of coccygeal nerves. Each dorsal root contains a dorsal root ganglion. A ventral root and dorsal root unite to form a spinal nerve
automatic nervous system; which connects the CNS to viscera, and
controls subconscious activities
neurotransmitter: include acetylcholine, amino acids, neuropeptides. The action depends on type of receptors in a specific synapse.
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nervous system: sensory input, integration and
processing (decision-making), and motor output (response)
reflex arc
Receptor: end of a dendrite or specialized receptor cell in a sensory organs- senses type of internal/external change
Interneuron : dendrite, cell body, and axon of a neurons within spinal cord. carries information from sensory neuron to moto neurons.
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sensory neurons: Dendrite, cell body, and axon. Carries information from receptor to the brain and spinal cord.
motor neurons: Dendrite, cell body, and axon. Carries instructions from brain or spinal cord out to effector.