15 Questions
Which type of muscle tissue is found in the walls of the heart?
Cardiac Muscle
What is the dense connective sheath surrounding the entire skeletal muscle called?
Epimysium
Which structure provides support to individual muscle fiber in skeletal muscle?
Endomysium
What is the plasma membrane of a muscle cell called?
Sarcolemma
Which type of muscle tissue consists of long, cylindrical fibers and multinucleated cells?
Skeletal Muscle
What is the smooth ER of a muscle cell called?
Sarcoplasmic Reticulum
What is the defining characteristic of cardiac muscle tissue?
Existence of intercalated discs
How are cardiac muscle fibers different from smooth muscle fibers?
Cardiac muscle fibers have striations, while smooth muscle fibers do not
What is the role of intercalated discs in cardiac muscle tissue?
To coordinate rhythmic and rapid contractions of the fibers
Where is the nucleus located in a cardiac muscle fiber?
In the center of the cell
Which characteristic differentiates cardiac muscle from skeletal muscle when viewed under a microscope?
Thickness and darkness of striations
What is the main location of cardiac muscle tissue in the body?
Muscular wall of the heart (myocardium)
How does the vascular supply to cardiac muscle tissue compare to other muscle tissues?
Dense blood capillary network with continuous supply
What describes the contraction and control factor for cardiac muscle tissue?
Rhythmic, rapid contractions coordinated involuntarily
Which alternative name is often used to describe cardiac muscle tissue?
'Involuntary' or 'striated' muscle tissue
Study Notes
Muscle Tissue Types
- Cardiac muscle tissue is found in the walls of the heart.
Skeletal Muscle Structure
- A dense connective sheath surrounding the entire skeletal muscle is called an epimysium.
- The structure that provides support to individual muscle fibers in skeletal muscle is called an endomysium.
- The plasma membrane of a muscle cell is called a sarcolemma.
Characteristics of Muscle Tissue
- Skeletal muscle tissue consists of long, cylindrical fibers and multinucleated cells.
- The smooth ER of a muscle cell is called sarcoplasmic reticulum.
- The defining characteristic of cardiac muscle tissue is the presence of intercalated discs.
- Cardiac muscle fibers differ from smooth muscle fibers in that they have striations and are branched.
- Intercalated discs in cardiac muscle tissue provide support for the heart to beat as a coordinated unit.
Cardiac Muscle Structure and Function
- The nucleus is located centrally in a cardiac muscle fiber.
- The characteristic that differentiates cardiac muscle from skeletal muscle when viewed under a microscope is the presence of intercalated discs.
- The main location of cardiac muscle tissue in the body is the heart.
- The vascular supply to cardiac muscle tissue is reduced compared to other muscle tissues due to its high energy demand.
- The contraction and control factor for cardiac muscle tissue is the autonomic nervous system.
- Cardiac muscle tissue is often also referred to as myocardium.
This quiz covers the characteristics and types of muscular tissue, including skeletal muscle, smooth muscle, and cardiac muscle. Topics include the structure of muscle cells, origin of muscle tissue, and distinguishing features of different types of muscle.
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