Anatomy Ch 7 Muscle Flashcard

Front

What is the dense layer of collagen fibers that surrounds an entire skeletal muscle?

Back

Epimysium.

Front

Where are calcium ions released from in response to action potentials arriving from the transverse tubules?

Back

Sarcoplasmic reticulum.

Front

What is labeled as I in a muscle structure diagram?

Back

Myofibril.

Front

What neurotransmitter is released from synaptic vesicles to initiate an action potential in the sarcolemma?

Back

Acetylcholine.

Front

What surrounds bundles of muscle fibers known as fascicles?

Back

Perimysium.

Front

What is the function of the epimysium in skeletal muscle?

Back

It provides structural support and protection to the muscle.

Front

What role do calcium ions play in muscle contraction?

Back

They bind to troponin, causing a conformational change that allows myosin to bind to actin.

Front

What is the basic functional unit of a muscle fiber?

Back

Sarcomere.

Front

What is the primary protein found in thick filaments of muscle fibers?

Back

Myosin.

Front

What is the term for the connective tissue that surrounds individual muscle fibers?

Back

Endomysium.