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

Question 1

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.

Answer 1

oxygen reserve

p. 417

Question 2

Which muscle types are striated?

Answer 2

skeletal and cardiac muscle

p. 410

Question 3

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

Answer 3

multinucleate syncytia

p. 411

Question 4

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

Answer 4

single

length

p. 411

Question 5

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?

Answer 5

sarcolemma

It helps the cell fuse with tendon fibers.

p. 411

Question 6

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 ________.

Answer 6

myofibrils

fascicle

p. 412

Question 7

What color are the various muscle fiber types?

Answer 7

slow twitch (type I) are RED

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

p. 419