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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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BIO 254 Muscular System Questions And Answers3 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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