Smooth Muscles Flashcards
What are the cell characteristics of skeletal muscle?
Long & cylindrical, multinucleated, heavily striated
What are the cell characteristics of cardiac muscle?
Branching networks, intercalated disks, single nucleus, lightly striated
What are the cell characteristics of smooth muscle?
Tapered at each end, nonstriated
What is the control of:
- Skeletal
- Cardiac
- Smooth
- Voluntary
- Involuntary
- Involuntary
Of the muscles, which have T tubules?
Skeletal + Cardiac
Of the muscles, which have the most developed SR?
Skeletal
Of the muscles, which have the least developed SR?
Smooth
What are the sources of calcium in the skeletal muscle?
SR
What are the sources of calcium in the cardiac muscle?
Extracellular fluid + SR
What are the sources of calcium in the smooth muscle?
Extracellular fluid + SR
Of the muscles, which have troponin?
Skeletal + Cardiac
Of the muscles, which do not have troponin?
Smooth
Of the muscles, which have gap junctions?
Cardiac, some in smooth
What are the neurotransmitters that are emitted from the initiation of smooth muscles?
Norepinephrine + Acetylcholine
With regards to smooth muscle, what does norepinephrine do?
Activates a- or b-adrenergic receptors