A scientist is trying to coax stem cells to differentiate into muscle to use as a therapy for muscular dystrophy. He looks at his Petri dish and is excited to see the cells contracting! The cells appear striated and multinucleate. What type of muscle are they?

Question

A.  cardiac muscle
B.  smooth muscle
C.  involuntary muscle
D.  skeletal muscle

Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?8

Gather Content
What do you already know about muscle tissue? What other information is related to the question?

Choose Answer
Given what you now know, what information is most likely to produce the correct answer?

Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Answer 1

D.  skeletal muscle

Clarify Question
What is the key concept addressed by the question?
        · This question is asking you to identify which specific type of muscle is present based on the characteristics of the muscle.
What type of thinking is required?
        · Apply level:
            o You are being asked to take what you already know and use, or apply, it to the specific identification of muscle tissue.

Gather Content
What do you already know about muscle tissue? What other information is related to the question?
        · Muscle tissue can be divided into three subdivisions; cardiac, skeletal, and smooth muscle.
        · Cardiac muscle is striated, involuntary, and tends to have a single nucleus per cell.
        · Smooth muscle is not striated, it is involuntary, and smooth muscle cells also tend to have one nucleus per cell.
        · Skeletal muscle is striated, voluntary, and each cell has more than one nucleus.

Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
        · Involuntary muscle includes cardiac and smooth muscle, and neither is multinucleate.
        · Neither smooth muscle nor cardiac muscle is multinucleate.
        · Skeletal muscle is the only striated, multinucleate muscle tissue.

Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
        · Apply level:
            o Answering this question correctly depended on your ability to use the types of muscle tissue in a new situation. If you got an incorrect answer, did you remember that skeletal muscle is striated, or that skeletal muscle cells are multinucleate? Did you have trouble extending muscle tissue to determine the correct answer?