Multiple Choice
-What is the structure indicated by the number 3 in Figure 12.1 and what is its functional significance?
A) A band : length of myosin attached to an M line
B) M line : where the tails of the myosin molecules are bound to one another
C) Z line : anchors the thin filaments together
D) sarcomere : the functional unit of muscle contraction whose length is changed as a muscle shortens and lengthens
E) H zone : area of myosin not overlapped by actin
Correct Answer:

Verified
Correct Answer:
Verified
Q47: Contraction of motor units in a(n) _manner
Q48: Which of the following muscle types has
Q49: What area of a sarcomere shows up
Q50: The repeated, oscillating interaction between actin and
Q51: Spontaneous depolarization of smooth muscle cells is
Q53: In order for crossbridge cycling to occur,
Q54: Which of the following stores calcium to
Q55: What is the antagonistic muscle to the
Q56: In smooth muscle, the structures analogous to
Q57: Which of the following is not part