CH 6: Muscle structure and function

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What are the basic units of a muscle?

Myofibrils (correct)

Muscle fibers

Sarcomeres

Fascicles

What type of connective tissue surrounds muscle fibers in bundles called fascicles?

Endomysium

Epimysium

Perimysium (correct)

Sarcolemma

Which protein filament within the sarcomeres is primarily made up of actin?

Titin filaments

Actin filaments (correct)

Myosin filaments

Tropomyosin filaments

What type of muscle tissue is characterized by a striped appearance due to alternating light and dark bands?

Skeletal muscle tissue Signup and view all the answers

What type of muscle tissue is composed of multiple fascicles enclosed by epimysium, forming an entire muscle?

Skeletal muscle tissue Signup and view all the answers

Which filament changes length during muscle contraction?

Actin filaments Signup and view all the answers

Which process provides the energy for muscle contraction?

Cellular respiration Signup and view all the answers

Which structure stores and releases calcium ions during muscle contraction?

Sarcoplasmic reticulum Signup and view all the answers

What is the role of ATP in muscle contraction?

ATP provides energy for the myosin heads to bind to actin Signup and view all the answers

Which organelle provides energy during muscle contraction?

Mitochondria Signup and view all the answers

What is the hierarchical order of muscle structure from basic unit to the entire muscle?

Myofibrils, Muscle Fibers, Muscle, Fascicles Signup and view all the answers

Which protein filament is responsible for muscle contraction by interacting with actin filaments?

Myosin Filaments Signup and view all the answers

Which connective tissue surrounds bundles of muscle fibers known as fascicles?

Perimysium Signup and view all the answers

What gives muscle fibers their characteristic striped appearance?

Sarcomeres Signup and view all the answers

What is the primary component of myosin filaments involved in muscle contraction?

Myosin Signup and view all the answers

What is the primary function of the sarcoplasmic reticulum in muscle cells?

To store and release calcium ions Signup and view all the answers

During muscle contraction, what causes the actin filaments to move?

The myosin filaments slide over the actin filaments Signup and view all the answers

Which structure in muscle fibers contains organelles that provide energy during muscle contraction?

Sarcoplasm Signup and view all the answers

What is the source of energy that powers muscle contraction?

ATP Signup and view all the answers

What happens to the length of the sarcomeres during muscle contraction?

They shorten Signup and view all the answers

What is the primary function of myosin filaments in muscle contraction?

Releasing energy Signup and view all the answers

Which connective tissue surrounds muscle fibers in bundles called fascicles?

Perimysium Signup and view all the answers

What is the hierarchical order of muscle structure from the basic unit to the entire muscle?

Myofibrils, muscle fibers, muscle, fascicles Signup and view all the answers

Which organelle provides energy during muscle contraction?

Mitochondria Signup and view all the answers

During muscle contraction, what causes the actin filaments to move?

Movement of myosin filaments Signup and view all the answers

What is the primary function of the sarcoplasm in muscle fibers during contraction?

To provide the energy required for myosin heads to bind to actin Signup and view all the answers

Which of the following processes is responsible for generating ATP during muscle contraction?

Cellular respiration Signup and view all the answers

What is the role of ATP in the interaction between myosin and actin filaments during muscle contraction?

It provides energy for the myosin heads to bind to actin Signup and view all the answers

Which structure is responsible for releasing calcium ions during muscle contraction?

Sarcoplasmic reticulum Signup and view all the answers

What is the primary role of the sarcoplasmic reticulum in muscle cells?

To store and release calcium ions Signup and view all the answers

CH 6: Muscle structure and function

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Questions and Answers

What are the basic units of a muscle?

What type of connective tissue surrounds muscle fibers in bundles called fascicles?

Which protein filament within the sarcomeres is primarily made up of actin?

What type of muscle tissue is characterized by a striped appearance due to alternating light and dark bands?

What type of muscle tissue is composed of multiple fascicles enclosed by epimysium, forming an entire muscle?

Which filament changes length during muscle contraction?

Which process provides the energy for muscle contraction?

Which structure stores and releases calcium ions during muscle contraction?

What is the role of ATP in muscle contraction?

Which organelle provides energy during muscle contraction?

What is the hierarchical order of muscle structure from basic unit to the entire muscle?

Which protein filament is responsible for muscle contraction by interacting with actin filaments?

Which connective tissue surrounds bundles of muscle fibers known as fascicles?

What gives muscle fibers their characteristic striped appearance?

What is the primary component of myosin filaments involved in muscle contraction?

What is the primary function of the sarcoplasmic reticulum in muscle cells?

During muscle contraction, what causes the actin filaments to move?

Which structure in muscle fibers contains organelles that provide energy during muscle contraction?

What is the source of energy that powers muscle contraction?

What happens to the length of the sarcomeres during muscle contraction?

What is the primary function of myosin filaments in muscle contraction?

Which connective tissue surrounds muscle fibers in bundles called fascicles?

What is the hierarchical order of muscle structure from the basic unit to the entire muscle?

Which organelle provides energy during muscle contraction?

During muscle contraction, what causes the actin filaments to move?

What is the primary function of the sarcoplasm in muscle fibers during contraction?

Which of the following processes is responsible for generating ATP during muscle contraction?

What is the role of ATP in the interaction between myosin and actin filaments during muscle contraction?

Which structure is responsible for releasing calcium ions during muscle contraction?

What is the primary role of the sarcoplasmic reticulum in muscle cells?

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