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BIO 254 Muscular System Questions And Answers

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BIO 254 Muscular System Questions And Answers

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Uploaded on: September 5, 2024
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Written in: 2024/2025
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bio 254 muscular system
bio 254
bio 254 muscular system questions and answers

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BIO 254 Muscular System Questions And Answers
3 types of muscles ANS skeletal, smooth, cardiac

Skeletal muscles ANS attach to bones of skeleton

-voluntary

composed of

-nervous tissue

-blood

-connective tissue

Cardiac muscle ANS Involuntary

-pump heart

Smooth muscle ANS -walls of internal organs

-involuntary

Connective tissues ANS coverings over skeletal muscles

-surronds muscle

Fascia ANS thin covering of connective tissue around a muscle

Tendon ANS Cord like mass of connective tissue that connects muscle to bone

Aponeurosis ANS Sheet like mass of connective tissue that connects a muscle to bone, skin or other muscle

Epimysium ANS surrounds entire muscle

-lies beneath fascia

Perimysium ANS Surrounds fascicles within muscle

, Endomysium ANS surrounds muscle fibers (cells) within fascicle

Skeletal muscle cell fibers ANS Multinucleated

-sarcolemma

-sarcoplasm

Many myofibrils

-sarcoplasmic reticulum

-Transverse tubule

-Triad

Sarcolemma ANS Cell membrane of muscle fiber

Sarcoplasm ANS cytoplasm of muscle fiber

Myofibrils ANS -long parallel structures

-consist of thin actin filaments and thick myosin filaments

Sarcomeres connect end to end to make up myofibrils

Sarcoplasmic reticulum ANS Endoplasmic reticulum of muscle

-stores calcium

Transverse tubule ANS Relays electrical impulses to the SR

Triad ANS consists of 1 tubules and 2 SR cisternae

Why muscle fibers appear striated ANS the arrangement of myofilaments in myofibrils

Sarcomere I band ANS light band

-composed of thick actin filaments

Sarcomere A band ANS Dark band

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