sensory (afferent) division
  • motor nerve fibers; conducts impulses from the CNS to effectors (muscles and glands)
  • name the two functional divisions of the autonomic nervous system that work in opposition to each other
  • somatic and visceral sensory nerve fibers; conducts impulses from receptors to the CNS
  • what are the functions of the nervous system
dendrites
  • short, tapering, diffusely branched processes; receptive (input) region of neuron; convey incoming messages toward cell body as graded potentials (short distance signals)
  • surround neuron cell bodies in the PNS; function similar to astrocytes of CNS
  • cells that line cerebrospinal fluid-filled cavities of the brain and spinal column; form permeable barrier between cerebrospinal fluid and tissue fluid bathing CNS cells; range in share from squamous to columnar; may be ciliated
  • structural units of the nervous system; large, highly specialized cells that conduct impulses
sensory input
  • somatic and visceral sensory nerve fibers; conducts impulses from receptors to the CNS
  • activation of effector organs (muscles and glands) produces a response
  • information gathered by sensory receptors about internal and external changes
  • name the two functional divisions of the peripheral nervous system
somatic nervous system
  • employs electrical and chemical means to send messages from cell to cell
  • communicates by means of chemical messengers (hormones) secreted into the blood
  • somatic and visceral sensory nerve fibers; conducts impulses from receptors to the CNS
  • motor division of the PNS; conducts impulses from CNS to skeletal muscle; voluntary nervous system
dendrites, axons
  • what are the functions of the nervous system
  • conducts impulses from visceral organs to CNS
  • excitable cells that transmit electrical signals
  • what are the two types of neuron processes
neuroglia
  • small cells that surround and wrap delicate neurons
  • branched cells that have processes that form myelin sheaths around CNS nerve fibers
  • bundles of neuron processes in PNS
  • information gathered by sensory receptors about internal and external changes
endocrine system
  • employs electrical and chemical means to send messages from cell to cell
  • communicates by means of chemical messengers (hormones) secreted into the blood
  • visceral motor nerve fibers; regulates smooth muscle, cardiac muscle, and glands; involuntary nervous system
  • the brain and spinal cord of the dorsal body cavity are apart of what division of the nervous system
somatic and autonomic nervous systems
  • excitable cells that transmit electrical signals
  • the two divisions of the motor division of the PNS
  • name the two functional divisions of the peripheral nervous system
  • One EPSP fails to bring the cell to threshold.
ependymal cells
  • branched cells that have processes that form myelin sheaths around CNS nerve fibers
  • information gathered by sensory receptors about internal and external changes
  • surround neuron cell bodies in the PNS; function similar to astrocytes of CNS
  • cells that line cerebrospinal fluid-filled cavities of the brain and spinal column; form permeable barrier between cerebrospinal fluid and tissue fluid bathing CNS cells; range in share from squamous to columnar; may be ciliated
oligodendrocytes
  • surround neuron cell bodies in the PNS; function similar to astrocytes of CNS
  • armlike processes that extend from body
  • branched cells that have processes that form myelin sheaths around CNS nerve fibers
  • transmits impulses from CNS to effector organs (muscles and glands)
sensory input > integration > motor output
  • name the two functional divisions of the peripheral nervous system
  • what are the two types of neuron processes
  • information gathered by sensory receptors about internal and external changes
  • what are the functions of the nervous system
parasympathetic division
  • division of the nervous system that is known as the integration and control center
  • master controlling and communicating system of the body
  • the portion of the nervous system outside the CNS; communication lines between the CNS and the rest of the body
  • functional division of autonomic nervous system that conserves energy and promotes house-keeping functions during rest
nerves
  • degree of myelination of the axon
  • conducts impulses from visceral organs to CNS
  • The neuron would be unable to repolarize.
  • bundles of neuron processes in PNS
schwann cells
  • surround all peripheral nerve fibers and form myelin sheaths in thicker nerve fibers; similar function as oligodendrocytes
  • small, ovoid cells with thorny processes touch and monitory neurons; migrate toward injured neurons; monitor the health of other neurons; can transform to phagocytize microorganisms and neuronal debris; known as the defensive cells in the CNS
  • information gathered by sensory receptors about internal and external changes
  • surround neuron cell bodies in the PNS; function similar to astrocytes of CNS
central nervous system (CNS), peripheral nervous system (PNS)
  • motor division of the PNS; conducts impulses from CNS to skeletal muscle; voluntary nervous system
  • the brain and spinal cord of the dorsal body cavity are apart of what division of the nervous system
  • what are the divisions of the nervous system
  • visceral motor nerve fibers; regulates smooth muscle, cardiac muscle, and glands; involuntary nervous system
sensory division, motor division
  • name the two functional divisions of the peripheral nervous system
  • the two divisions of the motor division of the PNS
  • transmits impulses from CNS to effector organs (muscles and glands)
  • information gathered by sensory receptors about internal and external changes
sympathetic, parasympathetic
  • motor nerve fibers; conducts impulses from the CNS to effectors (muscles and glands)
  • name the two functional divisions of the autonomic nervous system that work in opposition to each other
  • somatic and visceral sensory nerve fibers; conducts impulses from receptors to the CNS
  • what are the functions of the nervous system
electrical and chemical signals
  • division of the nervous system that is known as the integration and control center
  • cells communicate within the nervous system via
  • division of the nervous system that consists mainly of nerves that extend from the brain and spinal cord
  • the two divisions of the motor division of the PNS
motor (efferent) division
  • transmits impulses from CNS to effector organs (muscles and glands)
  • information gathered by sensory receptors about internal and external changes
  • A neuron can have only one axon, but the axon may have occasional branches along its length.
  • motor nerve fibers; conducts impulses from the CNS to effectors (muscles and glands)
autonomic nervous system
  • what are the divisions of the nervous system
  • communicates by means of chemical messengers (hormones) secreted into the blood
  • visceral motor nerve fibers; regulates smooth muscle, cardiac muscle, and glands; involuntary nervous system
  • movement and circulation of cerebrospinal fluid
neurons (nerve cells)
  • what are the functions of the nervous system
  • somatic and visceral sensory nerve fibers; conducts impulses from receptors to the CNS
  • the two divisions of the motor division of the PNS
  • excitable cells that transmit electrical signals
astrocytes
  • structural units of the nervous system; large, highly specialized cells that conduct impulses
  • cells that line cerebrospinal fluid-filled cavities of the brain and spinal column; form permeable barrier between cerebrospinal fluid and tissue fluid bathing CNS cells; range in share from squamous to columnar; may be ciliated
  • surround all peripheral nerve fibers and form myelin sheaths in thicker nerve fibers; similar function as oligodendrocytes
  • most abundant, highly branched glial cells found in CNS; cling to neurons, synaptic endings, and capillaries; support and brace neurons; control chemical environment around neurons
microglial cells
  • cells that line cerebrospinal fluid-filled cavities of the brain and spinal column; form permeable barrier between cerebrospinal fluid and tissue fluid bathing CNS cells; range in share from squamous to columnar; may be ciliated
  • small, ovoid cells with thorny processes touch and monitory neurons; migrate toward injured neurons; monitor the health of other neurons; can transform to phagocytize microorganisms and neuronal debris; known as the defensive cells in the CNS
  • branched cells that have processes that form myelin sheaths around CNS nerve fibers
  • small cells that surround and wrap delicate neurons
Nervous System
  • motor division of the PNS; conducts impulses from CNS to skeletal muscle; voluntary nervous system
  • visceral motor nerve fibers; regulates smooth muscle, cardiac muscle, and glands; involuntary nervous system
  • master controlling and communicating system of the body
  • the portion of the nervous system outside the CNS; communication lines between the CNS and the rest of the body
satellite cells
  • branched cells that have processes that form myelin sheaths around CNS nerve fibers
  • activation of effector organs (muscles and glands) produces a response
  • surround neuron cell bodies in the PNS; function similar to astrocytes of CNS
  • motor nerve fibers; conducts impulses from the CNS to effectors (muscles and glands)
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