Lecture 28 Flashcards
What are the three types of muscle tissue?
- skeletal
- cardiac
- smooth
What is the function of the skeletal muscle?
posture
movement
heat
What is the function of the cardiac muscle?
To pump blood
What is the function of the smooth muscle?
movement of fluids
When does contraction of the skeletal muscle occur?
on demand
When does contraction of the cardiac muscle occur?
continuously
When does contraction of the smooth muscle occur?
Waves of contractions (peristaltic), individually, specific
What type of muscle has multiple nuclei?
Skeletal
What is the shape of skeletal muscle cells>
long cylindrical
What is the shape of cardiac muscle?
Branching cells
What is the shape of smooth muscle cells?
Spindle shaped
What muscle type is voluntary?
Skeletal
What muscle types does action potential spread in?
Cardiac
smooth (sometimes)
What muscle type gives a fast contraction?
Skeletal
What muscle type gives a slow contraction?
Cardiac
What muscle type gives the slowest contraction?
Smooth
What allows the cardiac muscle to have action potential spreading?
Coupling of desmosomes (mechanical) and gap junctions (electrrical)
What allows the cardiac muscle to have action potential spreading?
Coupling of desmosomes (mechanical) and gap junctions (electrrical)
What does the smooth muscle cells look like when a blood vessel is constricted?
Bulging on top
When can smooth muscle cells have AP spreading?”
In Single units(gap junctions)
When can smooth muscle not have AP spreading?
In multi unit (absence of gap junctions)
What does the no gap junctions allow for?
Fine control of individual smooth muscle cells
