Muscle 3

Question 1

Location of cardiac muscle tissue

Answer 1

only in the MYOCARDIUM

Question 2

function of intercalated discs

Answer 2

to adhere and prevent separation of cardiac fibers during contraction, and to allow ocmmunication between adjacent fibers

Question 3

where can you find intercalated discs?

Answer 3

at the Z LINES of the sarcomeres in cardiac muscle only

Question 4

what kind of cell junctions are found in cardiac muscle

Answer 4

1) fascia adherens (similar to zonula adherens/belt desmosome of epithelia): they attach fibers and anchor actin filaments of the terminal sarcomeres.
2) desmosomes (spot desmosomes/maculae adherens made of intermediate filaments) to bind adjacent cells together
3) gap junctions (made of connexin protein) to couple adjacent cells together