Anatomy - Muscular System Flashcards

Questions and Answers

What is a structure that contains actin or myosin?

Fascicle

Filaments (correct)

Tendon

Myofibril

What is a myofibril?

A long, filamentous organelle found within muscle cells that has a banded appearance.

What is the sarcolemma?

The plasma membrane of the muscle cell.

What are muscle fiber cells?

Single cells that contract in response to stimulation and then relax when stimulation ends. Signup and view all the answers

What does the endomysium do?

Surrounds each muscle cell. Signup and view all the answers

What is the perimysium?

Connective tissue surrounding a fascicle. Signup and view all the answers

Define fascicle.

A discrete bundle of muscle cells. Signup and view all the answers

What is the epimysium?

Connective tissue ensheathing the entire muscle. Signup and view all the answers

What is fascia?

Layers of connective fibrous tissue that separates and holds muscles in position. Signup and view all the answers

What is a tendon?

A cordlike projection of fascia beyond the muscle that connects muscle to bone. Signup and view all the answers

What is a sarcomere?

The contractile unit of muscle; goes from Z line to Z line. Signup and view all the answers

Study Notes

Skeletal Muscle Composition

Filaments: Structures composed of actin or myosin, essential for muscle contraction.
Myofibril: Long organelles within muscle cells characterized by a banded appearance, contributing to muscle contraction.
Sarcolemma: The plasma membrane that encloses a muscle cell, critical for maintaining ion balance and signal transduction.
Muscle Fiber (Cells): Individual muscle cells that contract upon stimulation and relax after stimulation ceases.
Endomysium: A thin layer of connective tissue that surrounds each muscle fiber, providing protection and support.
Perimysium: Connective tissue that encases a group of muscle fibers, forming a fascicle, which aids in force distribution.
Fascicle: A bundle of muscle fibers, functioning together to transmit force.
Epimysium: A thick connective tissue sheath that surrounds the entire muscle, protecting and shaping it.
Fascia: A network of fibrous connective tissue that separates muscles from one another while holding them in place; covers the muscle with the epimysium.
Tendon: A fibrous cord that extends from fascia beyond the muscle and connects it to bone, facilitating movement.
Sarcomere: The smallest functional unit of muscle tissue, extending from one Z line to another, crucial for muscle contraction.

Description

Test your knowledge of the skeletal muscle composition with these flashcards. Each card provides a key term and its definition, covering essential concepts in anatomy. Perfect for students studying the muscular system.