Muscle Tissue Flashcards
This tissue is fibrous appearing, in essence it is the “meat” of the body
Muscle Tissue
What are the three main types of muscle tissue?
- Skeletal muscle
- Cardiac muscle
- Smooth muscle
Four properties of muscle
contractile, elastic, extensible, and excitable
This muscle tissue has long, cylindrical, multinucleated, striated (has a banding pattern) cells. The nuclei are always located in the periphery of the cell. The fibers do not branch.
Skeletal muscle
This muscle is also striated and usually has a single centrally located nucleus. The fibers (cells) of this muscle often branch and interweave.
Cardiac muscle
Imtercalated discs contain __________ (for cell to cell attachment) and _________________ (for cell to cell communication).
desmosomes, gap junctions
This tissue has tapering cells which are frequently indistinctly seen (difficult to visualize) and have a single large, well-centered nucleus. Striations are never visible in this tissue
Smooth muscle
It has branching fibers connected to one another at their ends by intercalated discs, one nucleus per cell, is striated. Its contraction is not under voluntary control. It is only found in the heart.
Cardiac muscle
These are cylindrical, multi nucleated, striated, and under voluntary control.
Skeletal Muscle Tissues
Muscle fibers are composed of ___________.
myofibrils
The myofibrils are composed of ___________ and _________ filaments.
actin, myosin
These are the basic functional units of the muscle fiber.
sarcomeres
The striations microscopically visible in skeletal muscle are formed by the regular arrangement of ___________ inside the cells.
proteins
In skeletal muscle tissue, the dark areas are called ____________ (protein myosin) and the light areas are called __________ (protein myosin).
A bands, I bands
It is attached to the bones through tendons to control movement of the body
Skeletal muscle tissue
These cells are spindle shaped, have a single, centrally located nucleus, and lack striations (it contains the same myofilaments they are just organized differently) and involuntary.
Smooth muscle tissue
It is found in the walls of hollow organs throughout the body. It plays an important role in the regulation of flow in such tissues for example aiding the movement of food through the digestive system via peristalsis.
Smooth muscle tissue
