Cycle 1, Muscle
Muscle Histology and Physiology Quiz
Test your knowledge on the intricacies of muscle histology and physiology with our engaging quiz. This quiz consists of multiple-choice questions that cover various aspects of skeletal, cardiac, and smooth muscles.
- Understand muscle structures and fun
ctions - Differentiate between types of muscle tissues
- Improve your knowledge in muscle biology
Which sentence/sentences is/are true?
Sarcoplasmatic reticulum is storing Ca2+.
Skeletal muscles are derived from fused myoblasts
Triad is present within the cardiac muscle
Caveolin 3 is involved in reparation of the sarcolemma
Which sentence/sentences are true?
The oval nuclei are located peripherally under cell membrane only in skeletal muscle.
Each fiber of skeletal muscle is surrounded by dense connective tissue of epimysium
Cardiac muscle cells posses one or two centrally located nuclei.
In smooth muscle sarcomeres are arranged in myofibrils
The sarcomere extends from M line to M line.
The dense bodies of smooth muscle cells are composed of actin.
The dense bodies contain alpha-actinin and are present in smooth muscles.
What is true about endomysium?
Surrounds the whole muscle
Is located between perimysium and epimysium
Is delicate, reticular connective tissue.
Surround the external lamina of individual muscle fibers
Surrounds the entire muscle
Capilarries form a rich network within the endomysium.
What is true about the skeletal muscle
Contraction is spontaneous.
Sarcoplasmic reticulum is forming two terminal cisterns per sarcomere in triads.
Actin-myosin binding is triggered by interaction of Ca2+ with troponin subunit C.
Regeneration is very poor.
Nuclei are centrally located
T-Tubules are present at A-I junctions.
Regeneration involves mitotic activity of muscle cells
Caveolae and gap junctions can be occasionally present
Intercalated discs are typical
T-Tubules are absent
Contraction is triggered at motor end plate
What statements about skeletal muscle are correct
Z line bisects the A band.
Sarcomere is a segment of myofibril between two Z lines.
Skeletal muscle fiber is covered in endomysium.
Are formed by structures called fibers.
Skeletal muscle fiber can proliferate.
Dark stained band is called the I band.
Skeletal muscle contain diads.
Skeletal muscle fibers are innervated by motor neurons.
Skeletal muscle fiber reveals cross striation
There are no sarcomeres in fibers
Regeneration of skeletal muscle directly depends on amount of calcium ions
L. Regeneration of skeletal muscles directly depends on intercalated discs
Fibers of skeletal muscle contain many nuclei
What is true about the skeletal muscle contraction?
To trigger a muscle contraction, calcium has to bind to myosin in smooth, skeletal and cardiac muscle cells
During the skeletal muscle contraction energy is released from ATP.
To trigger a muscle contraction, calcium has to bind to Troponin C in skeletal and cardiac muscle cells.
To trigger a muscle contraction, calcium has to bind to tropomyosin in skeletal and cardiac muscle cells.
What is true about the cardiac muscle?
Contraction is triggered at nodes of conducting fibers.
Nuclei are centrally located.
Contraction is triggered at motor end plate.
Fibers are aligned in branching arrangements.
What is true about perimysium?
It surrounds a bundle of fibers
It surrounds the whole muscle
It contains blood vessels
It surrounds every single muscle fiber
It does not contain any blood vessels
What is true about sarcomeres?
Contains Z line + ½ I Band + A Band + ½ I Band + Z line.
Are typical for smooth muscles
Extends from Z line to Z line
Contains Z line + whole I band + A band + whole I band + Z line
Are present only in smooth muscles.
The major protein of the Z line of sarcomere is creatine kinase.
In smooth muscle sarcomeres are arranged in myofibrils
Extends from M line to M line
The major protein of the Z line of sarcomere is myosin
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