Micro Exercise 2
M14_MARI6128_10_SE_CH14.QXD
1/19/11
5:58 PM
Page 193
NAME_________________________________ LAB TIME/DATE ________________________ EXERCISE
R E V I E W
S H E E T
14
Key: a. b. endomysium epimysium fascicle fiber myofibril myofilament perimysium sarcolemma sarcomere sarcoplasm tendon
Microscopic Anatomy and Organization of Skeletal Muscle
Skeletal Muscle Cells and Their Packaging into Muscles
1. Use the items in the key to correctly identify the structures described below.
G C ____________ ________ I ____________ ________ E ____________ ________ A ____________ ________ J ____________ ________ D ____________ ________
____________ ________ 1. 2. 3. 4. 5. 6. 7.
connective tissue ensheathing a bundle of muscle cells bundle of muscle cells
c. contractile unit of muscle a muscle cell thin reticular connective tissue surrounding each muscle cell plasma membrane of the muscle fiber a long filamentous organelle with a banded appearance found within muscle cells actin- or myosin-containing structure cord of collagen fibers that attaches a muscle to a bone d. e. f. g. h. i. j. k. 9.
F K ____________ ________
____________ ________ 8.
2. List three reasons why the connective tissue wrappings of skeletal muscle are important.
It provides strength to the muscle so it can endure everyday activities. ____________________________________________________________________________________________ _______
It provides a connection place for muscle fibers It helps provide a route for blood vessels. ____________________________________________________________________________________________ _______
____________________________________________________________________________________________ _______ 3. Why are there more indirect—that is, tendinous—muscle attachments to bone than there are direct attachments? ____________________________________________________________________________________________ _______
1/19/11
5:58 PM
Page 193
NAME_________________________________ LAB TIME/DATE ________________________ EXERCISE
R E V I E W
S H E E T
14
Key: a. b. endomysium epimysium fascicle fiber myofibril myofilament perimysium sarcolemma sarcomere sarcoplasm tendon
Microscopic Anatomy and Organization of Skeletal Muscle
Skeletal Muscle Cells and Their Packaging into Muscles
1. Use the items in the key to correctly identify the structures described below.
G C ____________ ________ I ____________ ________ E ____________ ________ A ____________ ________ J ____________ ________ D ____________ ________
____________ ________ 1. 2. 3. 4. 5. 6. 7.
connective tissue ensheathing a bundle of muscle cells bundle of muscle cells
c. contractile unit of muscle a muscle cell thin reticular connective tissue surrounding each muscle cell plasma membrane of the muscle fiber a long filamentous organelle with a banded appearance found within muscle cells actin- or myosin-containing structure cord of collagen fibers that attaches a muscle to a bone d. e. f. g. h. i. j. k. 9.
F K ____________ ________
____________ ________ 8.
2. List three reasons why the connective tissue wrappings of skeletal muscle are important.
It provides strength to the muscle so it can endure everyday activities. ____________________________________________________________________________________________ _______
It provides a connection place for muscle fibers It helps provide a route for blood vessels. ____________________________________________________________________________________________ _______
____________________________________________________________________________________________ _______ 3. Why are there more indirect—that is, tendinous—muscle attachments to bone than there are direct attachments? ____________________________________________________________________________________________ _______