42 Questions
Which type of muscle is striated?
Both skeletal and cardiac muscle
Which muscle type has the largest cell diameter?
Skeletal muscle
Which muscle type is under voluntary control?
Skeletal muscle
Which type of muscle tissue is capable of active regeneration?
Smooth muscle
Which type of muscle tissue has no regenerative ability?
Cardiac muscle
What are satellite cells?
Inactive myoblasts
Which structure contains only myosin filaments?
H bands
What is the function of the sarcoplasmic reticulum in muscle cells?
To sequester and release calcium ions
What is the function of dense bodies in smooth muscle?
To anchor actin-myosin filament bundles
Where are T-tubules located in cardiac muscle cells?
At Z lines
Which type of muscle cells are non-striated?
Smooth muscle cells
Which term is used to describe muscle cells that are longer than they are wide?
Fibers
What is the correct order of the three types of muscle cells, from non-striated to striated?
Smooth, skeletal, cardiac
Which type of muscle tissue is located near bones?
Skeletal muscle
Which muscle type is under voluntary control?
Skeletal muscle
Which muscle type has striations?
Skeletal muscle
Which muscle type has the smallest cell diameter?
Smooth muscle
Which muscle type has peripheral nuclei?
Skeletal muscle
Which connective tissue surrounds each fascicle in skeletal muscle?
Perimysium
What is the function of T tubules in skeletal muscle cells?
To form triads at the junction of A-I bands
Which structure contains only myosin filaments?
M lines
What is the function of intercalated disks in cardiac muscle cells?
To allow electrical stimuli to be passed
Which type of muscle tissue is present in walls of hollow organs and larger blood vessels?
Smooth muscle
What is the function of the sarcoplasmic reticulum in muscle cells?
To sequester & release calcium ions
What is the function of dense bodies in smooth muscle?
To anchor actin-myosin filament bundles
What is the function of the sarcoplasmic reticulum in muscle cells?
To store and release calcium ions
Which type of muscle cells are striated?
both cardiac and Skeletal muscle cells
Which type of muscle cells are fusiform with a single central nucleus?
Smooth muscle cells
Where are T-tubules located in cardiac muscle cells?
On the surface of the cell membrane
What is the function of dense bodies in smooth muscle?
To anchor actin filaments
Which type of muscle tissue has the least abundant blood supply?
Smooth muscle
Which type of muscle tissue has the ability to undergo limited regeneration?
Skeletal muscle
What are the three types of muscle cells?
Skeletal, cardiac, and smooth
Which muscle type is under voluntary control?
Skeletal muscle
Which type of muscle tissue has no regenerative ability?
Cardiac muscle
What are satellite cells?
Inactive myoblasts
Where are satellite cells located?
Scattered throughout cytoplasm
Which type of muscle tissue is capable of active regeneration?
Smooth muscle
Which type of muscle cells are striated?
Skeletal muscle cells
What happens to cardiac muscle when it dies?
It forms a scar
Where are T-tubules located in cardiac muscle cells?
In cardiac muscle cells
What is the function of dense bodies in smooth muscle?
Contraction
Study Notes
Muscle Types
- Striated muscle is skeletal muscle.
- Skeletal muscle has the largest cell diameter.
- Skeletal muscle is under voluntary control.
Muscle Tissue
- Skeletal muscle tissue is capable of active regeneration.
- Cardiac muscle tissue has no regenerative ability.
Muscle Cells
- Satellite cells are a type of stem cell that helps to repair muscle cells.
- Satellite cells are located near muscle fibers.
- Fusiform muscle cells are smooth muscle cells with a single central nucleus.
- Elongated muscle cells are longer than they are wide.
Muscle Cell Structure
- The sarcolemma is the structure that contains only myosin filaments.
- The sarcoplasmic reticulum is a type of smooth endoplasmic reticulum that stores and releases calcium ions in muscle cells.
- T-tubules are located in the sarcolemma of cardiac muscle cells and help to regulate muscle contraction.
- Intercalated disks are structures in cardiac muscle cells that allow for the rapid transmission of electrical signals.
- Dense bodies are structures in smooth muscle cells that help to anchor the thin filaments and regulate muscle contraction.
Muscle Tissue Locations
- Skeletal muscle tissue is located near bones.
- Smooth muscle tissue is present in the walls of hollow organs and larger blood vessels.
Muscle Characteristics
- Skeletal muscle has striations and peripheral nuclei.
- Cardiac muscle has striations and is under involuntary control.
- Smooth muscle has no striations and has a single central nucleus.
Muscle Functions
- T-tubules help to regulate muscle contraction in skeletal muscle cells.
- The sarcoplasmic reticulum helps to regulate muscle contraction by releasing and storing calcium ions.
- Dense bodies help to regulate muscle contraction by anchoring thin filaments.
- Intercalated disks help to allow for the rapid transmission of electrical signals in cardiac muscle cells.
Muscle Regeneration
- Skeletal muscle tissue has the ability to undergo active regeneration.
- Cardiac muscle tissue has no regenerative ability.
- Smooth muscle tissue has the ability to undergo limited regeneration.
Muscle Blood Supply
- Cardiac muscle tissue has the most abundant blood supply.
- Smooth muscle tissue has the least abundant blood supply.
Test your knowledge of muscle anatomy and physiology with this quiz! Learn about the different components of muscle fibers, including M lines, H bands, I bands, and Z lines. Explore the role of the sarcoplasmic reticulum in sequestering and releasing calcium ions.
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