Skeletal Muscle Levels of Organization

1.

Multiple Choice

20 sec

1 pt

What is shown in the colored part of this diagram?

a whole muscle

five muscle fibers

five muscle fascicles

five myofibrils

2.

Multiple Choice

20 sec

1 pt

What is labeled "1" in the diagram?

sarcolemma

sarcoplasmic reticulum

transverse tubules

myofibril

3.

Multiple Choice

20 sec

1 pt

What is labeled "2" (the yellow part) in the diagram?

sarcolemma

sarcoplasmic reticulum

transverse tubules

myofibril

4.

Multiple Choice

20 sec

1 pt

What is labeled "4" (the blue/purple part) in the diagram?

sarcolemma

sarcoplasmic reticulum

transverse tubules

myofibril

5.

Multiple Choice

45 sec

1 pt

Name the following in order from largest to smallest:

muscle, muscle fascicle, muscle cell, myofibril, filaments

muscle, muscle fascicle, muscle cell, filaments, myofibril

muscle, muscle cell, muscle fascicle, myofibril, filaments

muscle, muscle cell, muscle fascicle, filaments, myofibril

6.

Multiple Choice

30 sec

1 pt

What happens in the transverse tubules of a muscle cell?

excess ATP is stored in the tubules

calcium ions are released into tubules' extracellular fluid

action potentials are conducted through the tubules to the inside of the cell

ATP is produced in the mitochondria found in the tubules

7.

Multiple Choice

20 sec

1 pt

Which type of muscle tissue connects bones to other bones, allowing for movement of our joints?

cardiac

smooth

skeletal

sympathetic

8.

Multiple Choice

30 sec

1 pt

Which type of muscle tissue is involuntary and found in places such as the stomach and intestines?

cardiac

smooth

skeletal

myofibrilic

9.

Multiple Choice

30 sec

1 pt

What is labeled "6" in the diagram? These help convert oxygen and sugars into ATP for the muscle cell to use.

actin

sarcoplasmic reticulum

myosin

mitochondria

10.

Multiple Choice

20 sec

1 pt

Which of the following is NOT a molecule?

ATP

fascicle

actin

myosin

11.

Multiple Choice

30 sec

1 pt

Which of these is the smallest?

myofilament

myofibril

muscle fiber

fascicle

12.

Multiple Choice

30 sec

1 pt

What do you call a single bundle of muscle cells?

muscle

fascicle

fiber

myofibril

13.

Multiple Choice

30 sec

1 pt

Where are the calcium ions in a muscle fiber stored when the muscle isn't contracting?

mitochondria

myofibrils

T-tubules

sarcoplasmic reticulum

14.

Multiple Choice

30 sec

1 pt

What is the length between Z-lines of an actin molecule called?

fascicle

sarcomere

myosin binding site

sarcoplasmic length

15.

Multiple Choice

30 sec

1 pt

For a signal to get from a neuromuscular synapse to a T-tubule, it must travel along what?

sarcolemma

sarcoplasmic reticulum

myofibril

myofilament

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