Ch 11: The Muscular and Skeletal Systems (Princeton Review) Flashcards Preview

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Flashcards in Ch 11: The Muscular and Skeletal Systems (Princeton Review) Deck (7)
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1
Q

Myoglobin is a globular protein similar to one of the 4 subunits of hemoglobin. The role of myoglobin is to provide an ______ _______ by taking O2 from hemoglobin and then releasing it as needed.

A

oxygen reserve

p. 417

2
Q

Which muscle types are striated?

A

skeletal and cardiac muscle

p. 410

3
Q

Skeletal muscle cells are ___________ _______ formed by the fusion of individual cells during development.

A

multinucleate syncytia

p. 411

4
Q

Muscle cells are innervated by a ______ nerve ending, and stretch the entire ______ of the muscle.

A

single

length

p. 411

5
Q

The myofiber has a cell membrane, called the __________, that is made of the plasma membrane and an additional layer of polysaccharide and collagen. What does this additional layer help to do?

A

sarcolemma

It helps the cell fuse with tendon fibers.

p. 411

6
Q

Within each skeletal muscle cell (myofiber), there are many smaller units called _________, which look like straws within a bigger straw.

A bundle of multiple myofibers is called a ________.

A

myofibrils

fascicle

p. 412

7
Q

What color are the various muscle fiber types?

A

slow twitch (type I) are RED

fast twitch/ intermediate (type IIA) are still red
fast twitch (type IIB) are white 

p. 419