peripheral nervous system
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the sensory and motor neurons that connect the central nervous system to
the rest of the body
sensory function of nervous system
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Gathers internal & external environmental information
Four sources of energy for ATP production in muscle
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free ATP, phosphocreatine, glycolysis and cellular respiration
ion channels
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-a complex of protein molecules in a cell membrane that form a pore
through which ions can pass
-their opening or closing will cause a redistribution of ions in the
postsynaptic cell.
Schwann cells
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Supporting cells of the peripheral nervous system responsible for the
formation of myelin.
How the resting membrane potential is maintained
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The negative resting membrane potential is created and maintained by
increasing the concentration of cations outside the cell (in the extracellular
fluid) relative to inside the cell (in the cytoplasm). The negative charge
within the cell is created by the cell membrane being more permeable to
potassium ion movement than sodium ion movement. In neurons, potassium
, ions are maintained at high concentrations within the cell while sodium ions
are maintained at high concentrations outside of the cell. The cell
possesses potassium and sodium leakage channels that allow the two
cations to diffuse down their concentration gradient.
Features of smooth muscle cells
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-Not striated, fibers smaller than those in skeletal muscle
-Spindle-shaped, central nucleus
-More actin than myosin
-Caveolae: indentations in sarcolemma; may act like T-tubules
-Dense bodies
-Ca2+ required to initiate contractions
-relaxation
Ganglia
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PNS groups of cells and gray matter
Sacrolemma
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the sensory and motor neurons that connect the central nervous system to
the rest of the body
sensory function of nervous system
Give this one a try later!
Gathers internal & external environmental information
Four sources of energy for ATP production in muscle
,Give this one a try later!
free ATP, phosphocreatine, glycolysis and cellular respiration
ion channels
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-a complex of protein molecules in a cell membrane that form a pore
through which ions can pass
-their opening or closing will cause a redistribution of ions in the
postsynaptic cell.
Schwann cells
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Supporting cells of the peripheral nervous system responsible for the
formation of myelin.
How the resting membrane potential is maintained
Give this one a try later!
The negative resting membrane potential is created and maintained by
increasing the concentration of cations outside the cell (in the extracellular
fluid) relative to inside the cell (in the cytoplasm). The negative charge
within the cell is created by the cell membrane being more permeable to
potassium ion movement than sodium ion movement. In neurons, potassium
, ions are maintained at high concentrations within the cell while sodium ions
are maintained at high concentrations outside of the cell. The cell
possesses potassium and sodium leakage channels that allow the two
cations to diffuse down their concentration gradient.
Features of smooth muscle cells
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-Not striated, fibers smaller than those in skeletal muscle
-Spindle-shaped, central nucleus
-More actin than myosin
-Caveolae: indentations in sarcolemma; may act like T-tubules
-Dense bodies
-Ca2+ required to initiate contractions
-relaxation
Ganglia
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PNS groups of cells and gray matter
Sacrolemma
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