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Irregular transverse thickenings of the sarcolemma connect cardiac muscle fibers to neighboring muscle fibers. The gap junctions that occur with irregular transverse thickening of the sarcolemma allow the myocardium to contract as a single unit.
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What is the plasma membrane of the muscle fiber?
Sarcolemma
What is a cell membrane of a muscle fiber called?
what is the plasma membrane of the muscle cell
When the chemically gated ion channels open which ion is mainly responsible for depolarizing the sarcolemma?
The main ion responsible for depolarizing the sarcolemma is sodium (Na+).
A folded region of the sarcolemma at the neuromuscular junction?
At the neuromuscular junction (or presynaptic end) of the sarcolemma, it is referred to as end plate synapse potential.
When acetylcholine diffuses across the synaptic cleft and binds to receptors on the folded sarcolemma it initaly causes what channels to open in the sarcolemma?
Chemically gated Na+ ions.
What is the irregular traverse thickenings of the sarcolemma that contain gap junctions which allow muscle action potentials to spread quickly from one cardiac muscle fiber to another?
Intercalated Discs
What connects the sarcolemma and the sarcoplasmic reticulum?
They connect to the transverse tubules of the the sarcolemma at triad junctions.
What are the tunnel-like extensions of the sarcolemma into the muscle fiber?
transverse tubules transverse tubules
What is name given to the regularly spaced infoldings of the sarcolemma?
transverse or T tubules
What is the plasma membrane of the muscle fiber?
Sarcolemma
What is a cell membrane of a muscle fiber called?
what is the plasma membrane of the muscle cell
Is sarcolemma a ligament?
No, the sarcolemma is the plasma membrane of a muscle cell.
Is Sarcomere and sarcolemma the same thing?
sarcomere and sarcolemma are two different things. a sarcomere is between two d zisks of a myofiber (muscle fiber). a sarcolemma is a plasma membrane. there are many sections of sarcomere under the layer of sarcolemma.
What is the difference between endomysium and sarcolemma?
Sarcolemma is the equivalent of the plasma membrane of the muscle fiber (aka muscle cell). The endomysium is a connective tissue that bounds around the sarcolemma.
What are the thickenings that occur to the lenses of the eye affecting vision especially in the elderly?
cataracts
What is the treatment for sarcolemma?
Sarcolemma is defined as a thin membrane encasing a muscle fiber. This has no treatment as it is not an illness, injury or problem.
Where are acetycholine receptors found?
In the Sarcolemma
