BIOS252 EXAM 1
Study online at https://quizlet.com/_a0n1zd
1. Describe skeletal -Striated
muscle -Voluntary muscle
-Is 40% to 50% of body weight ("red meat" attached to bones)
-long, slender, multinucleated cells that are organized in parallel to one another
2. Describe smooth -Nonstriated, involuntary, visceral muscle
muscle -Found in walls of hollow visceral structures such as digestive tract, blood vessels,
and ureters
-Contractions not under voluntary control; movement caused by contraction is
involuntary
3. Describe cardiac -comprises bulk of heart
muscle -cells branch frequently
-Characterized by unique dark bands---intercalated disks
-intercalated disks allow cardiac muscle cells to contract efficiently as a whole unit
-Uninucleate
-Striated
-Involuntary control
, BIOS252 EXAM 1
Study online at https://quizlet.com/_a0n1zd
4. Identify the sim- -Smooth and cardiac are uninucleated, under involuntary control
ilarities between -Cardiac and skeletal are striated
the three types of
muscle.
5. Describe Con- ability to contract(shorten)
tractibility
6. Describe Ex- responds to stimulation
citability
7. Describe Elastici- ability to go back to resting state
ty
8. Describe Extensi- ability to extend or stretch without damage
bility
9. Endomysium -Thin sleeve of loose connective tissue around each muscle fiber
-Allows room for capillaries and nerve fibers to reach every muscle fiber
-Provides extracellular chemical environment for the muscle fiber and its associated
nerve ending
, BIOS252 EXAM 1
Study online at https://quizlet.com/_a0n1zd
10. Perimysium -Thicker connective tissue that wraps muscle fibers together in bundles---fascicles
-carries the larger nerves and blood vessels as well as stretch receptors---muscle
spindles.
11. Epimysium -Fibrous sheath surrounding entire muscle
-on its outer surface, the epimysium grades into the fascia; its inner surface issues
projections between the fascicles to form the perimysium
12. sarcomere -Contractile unit of muscle
-Separated from each other by dark bands called Z lines
-Distance between Z disc to a Z disc
13. I band -from the end of one thick filament to the beginning of the next thick filament
-This is what creates the light band
14. A band -from the beginning of one thick filament to the end of the same thick filament
-This is what creates the dark band
15. H band -from the end of one thin filament to the beginning of the next thin filament
-not as dark
Study online at https://quizlet.com/_a0n1zd
1. Describe skeletal -Striated
muscle -Voluntary muscle
-Is 40% to 50% of body weight ("red meat" attached to bones)
-long, slender, multinucleated cells that are organized in parallel to one another
2. Describe smooth -Nonstriated, involuntary, visceral muscle
muscle -Found in walls of hollow visceral structures such as digestive tract, blood vessels,
and ureters
-Contractions not under voluntary control; movement caused by contraction is
involuntary
3. Describe cardiac -comprises bulk of heart
muscle -cells branch frequently
-Characterized by unique dark bands---intercalated disks
-intercalated disks allow cardiac muscle cells to contract efficiently as a whole unit
-Uninucleate
-Striated
-Involuntary control
, BIOS252 EXAM 1
Study online at https://quizlet.com/_a0n1zd
4. Identify the sim- -Smooth and cardiac are uninucleated, under involuntary control
ilarities between -Cardiac and skeletal are striated
the three types of
muscle.
5. Describe Con- ability to contract(shorten)
tractibility
6. Describe Ex- responds to stimulation
citability
7. Describe Elastici- ability to go back to resting state
ty
8. Describe Extensi- ability to extend or stretch without damage
bility
9. Endomysium -Thin sleeve of loose connective tissue around each muscle fiber
-Allows room for capillaries and nerve fibers to reach every muscle fiber
-Provides extracellular chemical environment for the muscle fiber and its associated
nerve ending
, BIOS252 EXAM 1
Study online at https://quizlet.com/_a0n1zd
10. Perimysium -Thicker connective tissue that wraps muscle fibers together in bundles---fascicles
-carries the larger nerves and blood vessels as well as stretch receptors---muscle
spindles.
11. Epimysium -Fibrous sheath surrounding entire muscle
-on its outer surface, the epimysium grades into the fascia; its inner surface issues
projections between the fascicles to form the perimysium
12. sarcomere -Contractile unit of muscle
-Separated from each other by dark bands called Z lines
-Distance between Z disc to a Z disc
13. I band -from the end of one thick filament to the beginning of the next thick filament
-This is what creates the light band
14. A band -from the beginning of one thick filament to the end of the same thick filament
-This is what creates the dark band
15. H band -from the end of one thin filament to the beginning of the next thin filament
-not as dark
