Chapter 10 part 3 Flashcards
Cardiac Muscle tissue is located
in the walls of the heart(myocardium)
cardiac muscle tissue funtion is
to propel blood out of the heart
maintain blood pressure
Cardiac muscle tissue Appearance: Shape= # of nuclei= Striated due to Contain specialized junctions called
Short branched
1-2
presence of sacromeres
intercalated discs which have gap junctions
Specialized autorhythmic cardiac muscle cells are responsible for creating a
heart beat
rate and force of contraction is adjusted by
the autonomic nervous system
Smooth Muscle Tissue is around hollow organs to
mix materials
strengthen organs
propel material
smooth muscle tissue is along passageways to
control diameter propel material segments(breaks down) material regulates passage lift hair when scared or cold controlled the amount of light that enters eye
smooth muscle tissue is located
Walls of hollow organs Along passageways Internal sphincters Arrector pili Iris
Appearance of smooth muscle tissue
Shape=
# of nuclei=
Nonstriated because
Short fusiform (wide middle w/ tapered ends)
1
myofilaments not in a sarcomere
thick and thin filaments extend between
dense bodies
dense plaques
Dense bodies
location where intermediate filaments (cytoskeleton structure) interact within the sarcoplasm
dense plaques
location where intermediate filaments attach to sarcolemma
smooth muscles are controlled by
autonomic nervous system
Methods of stimulation
Multiunit smooth muscleSynaptic knob releases NTs to target fiber similarly to how skeletal muscles are stimulated
locations of smooth muscle fibers
Iris
Arrector pili
Larger passageways of respiratory system
Large arteries
