Ch. 7.1-7.3 Muscular System Exam with
Complete Solutions
There are over ____ muscles in the body - ANS-600
Muscles are make up _____ of the body weight of an adult - ANS-45%
How are muscle bundle fibers held together? - ANS-by connective tissue
What happens when fibers are stimulated by the nerves? - ANS-contract (become
shorter & thicker) which causes movement
contraction of muscle fibers is dependent on - ANS-myofilaments
2 myofilaments - ANS-actin and myosin
functions of muscles - ANS-1. movement
2. maintain posture
3. stabilize joints
4. generate heat
5. protection of internal organs
3 types of muscles - ANS-skeletal, smooth, cardiac
skeletal muscle - ANS-striated, voluntary muscle, mulinucleated, contacts rapidly and
tired easily
cardiac muscle - ANS-striated, involuntary
smooth muscle - ANS-non-striated, involuntary, one nucleus
3 indirect skeletal muscle attachments - ANS-tendons, fascia, and aponeurosis
tendons - ANS-attach muscle to bone and pulling forces
fascia - ANS-a tough, sheetlike membrane of connective tissue beneath the skin that
attaches, stabilizes, covers and protects tissue
Aponeurosis - ANS-A broad, flat sheet or ribbon of fibrous, tendon-like material that
takes the place of a tendon in sheet-like muscles that have a wide area of attachment
Complete Solutions
There are over ____ muscles in the body - ANS-600
Muscles are make up _____ of the body weight of an adult - ANS-45%
How are muscle bundle fibers held together? - ANS-by connective tissue
What happens when fibers are stimulated by the nerves? - ANS-contract (become
shorter & thicker) which causes movement
contraction of muscle fibers is dependent on - ANS-myofilaments
2 myofilaments - ANS-actin and myosin
functions of muscles - ANS-1. movement
2. maintain posture
3. stabilize joints
4. generate heat
5. protection of internal organs
3 types of muscles - ANS-skeletal, smooth, cardiac
skeletal muscle - ANS-striated, voluntary muscle, mulinucleated, contacts rapidly and
tired easily
cardiac muscle - ANS-striated, involuntary
smooth muscle - ANS-non-striated, involuntary, one nucleus
3 indirect skeletal muscle attachments - ANS-tendons, fascia, and aponeurosis
tendons - ANS-attach muscle to bone and pulling forces
fascia - ANS-a tough, sheetlike membrane of connective tissue beneath the skin that
attaches, stabilizes, covers and protects tissue
Aponeurosis - ANS-A broad, flat sheet or ribbon of fibrous, tendon-like material that
takes the place of a tendon in sheet-like muscles that have a wide area of attachment
