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Actin and Myosin
Filaments within muscle fibers
Contraction
Function of muscle fibers
Skeletal Muscle Tissue
forms the flesh of the body, cells are long, cylindrical, striated (striped) and multi-nucleated (peripheral) with many mitochondria, have blunt ends
Location of Skeletal Muscle Tissue
-Combined with connective tissues and neural tissue in skeletal muscles
-Attached to skeleton or skin
- tongue
Function of Skeletal Muscle Tissue
-Moves or stabilizes the position of the skeleton
-guards entrances and exits to the digestive, respiratory, and urinary tracts
-generates heat
-protects internal organs
-Voluntary muscle
Skeletal Muscle Tissue
Cardiac Muscle Tissue
cells are short, branched, single nucleus, with some striations, cells connected by intercalated discs (joints between cells)
-gap junctions allow ions to pass freely from cell to cell (rapid electrical impulse so cells beat in unison)
Location of cardiac muscle tissue
Heart
Function of cardiac muscle tissue
-Circulates blood by causing the heart to pump
-maintains blood pressure
-involuntary muscle
Cardiac Muscle Tissue
Smooth Muscle Tissue
-Cells are short, spindle-shaped and nonstriated, single, central nucleus
-When contracts, cavity becomes smaller, when relax they expand
-Moves slower than other muscle types
Location of smooth muscle tissue
Found in the walls of hollow organs: digestive, respiratory, urinary and reproductive organs, blood vessels, skin (arrector pili)
Function of smooth muscle tissue
-Moves food, urine and reproductive tract secretions
-controls diameter of respiratory passageways
- regulates diameter of blood vessels
-Involuntary muscle
Smooth Muscle Tissue
Location of Neural Tissue
Brain, spinal cord, nerves
Function of Neural Tissue
Communicate through electrical impulses
Neuron
cell body with dendrites, long axon
Neuroglia
designed to insulate, support, and protect neurons
Neurons and Neuroglia
The 2 types of neural tissue
Neuron
Neuroglia
Intercalated discs
joins between cells
Gap junctions
allow ions to pass freely from cell to cell (rapid electrical impulse so cells beat in unison)