Muscle Tissue Types Quiz

Muscle tissue found in the walls of hollow organs like intestines and blood vessels. It's involuntary, meaning you can't control it, and has a smooth, non-striated appearance. Its cells are spindle-shaped, meaning they are long and narrow with pointed ends.

Muscle tissue primarily responsible for voluntary movements, like walking and lifting. It's attached to bones, has a striated appearance, and is made up of long, cylindrical cells that have multiple nuclei.

Muscle tissue found only in the heart. It's involuntary, like smooth muscle, but also has a striated appearance, like skeletal muscle. Its cells are branched and interconnected, allowing the heart to contract as a coordinated unit.

The increase in the size of muscle fibers.

The creation of new muscle fibers.

The specialized form of smooth endoplasmic reticulum found in muscle cells.

A rare process in adults where the number of muscle cells increases.

The process of increasing the number of cells in a tissue.

The process of increasing the size of individual cells.

A type of cell with a spindle shape, meaning it's wider in the middle and narrower at the ends.

A single nucleus located near the center of the cell.

The outermost layer of the heart, providing protection and anchoring the heart in place.

The inner layer of the pericardium, creating a double-layered sac that encloses the heart, protecting it from friction as it beats.

The outer layer of the heart itself, continuous with the visceral layer of the serous pericardium.

A specialized membrane surrounding each muscle fiber, containing numerous pinocytotic vesicles.

Small spaces between muscle fibers, allowing for coordinated contractions.

Fine, thread-like structures made of collagen, providing support and structure.

A thin layer that surrounds muscle fibers, acting as a barrier and anchoring the fibers.

Specialized conducting fibers found in the subendocardial layer of the heart that transmit electrical impulses, coordinating the heartbeat.

Junctions between cardiac muscle cells that allow for efficient electrical and mechanical coupling, facilitating coordinated contraction of the heart.

An attachment site for actin filaments in intercalated discs, preventing separation during powerful heart contractions.

Anchor points that bind cells together in intercalated discs, preventing tearing during heart contractions.

The layer that surrounds a single muscle fiber, composed of loose connective tissue.

Bundles of muscle fibers wrapped in perimysium, creating a hierarchy within the muscle.

The dense connective tissue that encases an entire muscle, providing structural support and compartmentalization.

Thin filaments composed of actin, crucial for the sliding filament mechanism of muscle contraction.

A modified Z line that connects adjacent cardiac muscle cells in the intercalated disc.

Specialized protein kinase that regulates muscle contraction in smooth muscle by activating myosin light chains.

The ability of a group of cells to act as one unit, coordinated by the rapid spread of electrical signals through gap junctions.

The coordinated contraction of muscle tissue, facilitated by the rapid spread of electrical signals through gap junctions.

Filaments within muscle cells responsible for generating force during contraction. Composed of myosin molecules with globular heads.

The basic functional unit of a muscle fiber, containing organized arrangements of myosin and actin filaments.

Muscle tissue found exclusively in the heart, responsible for pumping blood throughout the body. It exhibits synchronized contraction.

The release of calcium ions from the sarcoplasmic reticulum, initiating muscle contraction.

Muscle tissue that contracts rapidly and forcefully, allowing for quick movements and bursts of power.

Muscle tissue designed for endurance activities, contracting slowly and steadily. It's rich in mitochondria and myoglobin, providing energy for sustained activity.

A specialized structure in smooth muscle cells. These tiny invaginations of the cell membrane play a role in signal transduction and calcium regulation.

The junction where a motor neuron communicates with a muscle fiber, releasing acetylcholine to initiate muscle contraction.

A group of muscle fibers controlled by a single motor neuron.

The ability of a muscle to maintain a constant level of tension over time.

The basic unit of a muscle contraction, consisting of the arrangement of actin and myosin filaments.

The protein that makes up thin filaments in muscle cells and interacts with myosin for contraction.

The protein that makes up thick filaments in muscle cells and interacts with actin for contraction.