Smooth and Cardiac Muscle Tissue Flashcards
1
Q
What is the function of the fascia adherentes?
A
Fascia adherentes anchors actin filaments of sarcomeres and is part of transverse component.
2
Q
What are the intercalated disks of cardiac muscle tissue composed of?
A
- macula adherents (desmosomes)
- fascia adherentes
- gap junctions
3
Q
What structure secretes ANP?
A
Atrial natriuretic peptides are secreted by cardiac muscle cells in atria.
4
Q
What are the characteristics of smooth muscle cells?
A
- single mononucleated with central nucleus
- no sarcomeric arrangement
- cells innervated via ANS ro enteric system
- do not respond “all-or-none”
- cells connected via gap junctions
5
Q
How is excitation spread through smooth muscle sheets?
A
Excitation is spread through numerous gap junctions in smooth muscle sheets and most major organs are poorly innervated.
