Muscle System – DUE DECEMBER 1st
Choose the best answer to each of the following questions.
1) How does muscle tissue contribute to homeostasis?
A) by generating heat that helps maintain body temperature
B) by moving materials through the body
C) by pulling on bones to move the body
D) A, B and C are correct
2) The primary function of muscle is
A) conversion of chemical energy into mechanical energy.
B) conversion of chemical energy into radiant energy.
C) conversion of mechanical energy into heat energy.
D) conversion of heat energy into mechanical energy.
3) Skeletal muscle
A) is striated.
B) is under voluntary control.
C) is made up of sarcomeres.
D) A, B and C are correct.
4) Cardiac muscle
A) is found in the walls of blood vessels and in the heart.
B) is largely under voluntary control.
C) is striated.
D) none of the above
5) Smooth muscle
A) is largely under voluntary control.
B) is located in the coverings of hollow organs.
C) is striated.
D) moves blood through the heart
6) The ability of a muscle tissue to stretch without being damaged is called
A) contractility.
B) extensibility.
C) irritability.
D) elasticity.
7) A muscle fiber (myofiber) is a muscle
A) contractile unit.
B) cell.
C) sarcomere.
D) A and B are correct.
8) The outermost extension of deep connective tissue that surrounds a muscle is the
A) endomysium.
C) perimysium
B) epimysium.
D) aponeurosis.
9) Thick filaments
A) are composed primarily of myosin.
B) are able to convert mechanical energy into chemical energy.
C) are primarily regulatory proteins.
D) are primarily structural proteins.
10) Thin filaments
A) are composed of titin.
B) are connected to the M lines.
C) are able to convert chemical energy to mechanical energy.
D) are composed of actin, troponin and tropomyosin.
11) Which of the following does NOT happen during a muscle contraction?
A) The myosin heads bind to actin.
B) The myosin heads pull the thin filaments toward the M line.
C) The sarcomere shortens.
D) The thick and thin filaments shorten.
12) Place the events of a contraction cycle in the order in which they occur:
1. ATP hydrolysis
2. detachment of myosin head from actin
3. power stroke
4. crossbridge formation
A) 1, 4, 3, 2
B) 1, 4, 2, 3
C) 1. 3, 4, 2
D) 1, 3, 2, 4
13) Which of the following muscles is used in breathing?
A) diaphragm
B) external intercostals
C) internal intercostals
14) Which muscle is the primary abductor of the arm?
A) deltoid
B) teres major
15) Which of the following is a powerful forearm extensor?
A) brachialis
B) brachioradialis
C) triceps brachii
D) A and B are correct.
E) 1, 2, 3, 4
D) A and B are correct.
E) A, B and C are correct.
C) subscapularis
D) supraspinatus
16) Four year old Parker has been going to the health club with his dad. Today he is showing the trainers
his big muscle. Parker flexes his forearm at the elbow and a bulge appears. That bulge is, in part, due to
the contraction of Parker’s
A) triceps brachii
D) pronator teres
B) anconeus
E) supinator
C) biceps brachii
17) Which of the following muscles is NOT part of the quadriceps femoris?
A) rectus femoris
D) vastus lateralis
B) biceps femoris
E) vastus intermedius
C) vastus medialis
Matching: Choose the answer from the column on the right that best matches the description or
term on in the column on the left.
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18) fusion of connective tissues; joins muscles to
bones
A) endomysium
B) epimysium
19) bundles of muscle fibers
20) connective tissue around bundle of muscle
fibers
C) fascicles
D) perimysium
E) tendon
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21) site where thick and thin filaments overlap
each other
A) A band
B) H zone
22) site where support proteins attach to thick
filaments to each other
C) I band
D) M line
23) sites delineating ends of sarcomeres
E) Z discs
24. Tendons are connective tissues at the ends of muscle that
A. attach muscle to muscle.
B. attach different types of skeletal muscle to each other
C. allow nerves and blood vessels to innervate the muscle
D. attach muscle to bone.
25. The layer of connective tissue that contains blood vessels and nerves is the
A. epimysium.
B. perimysium.
C. fascicle
D. endomysium.
For 26- 31, Match the correct name to the muscle.
26
KEY:
28
27
29
30
31
A. Gastrocnemius
B. Tibialis Anterior
C. Rectus femoris
D. Vastus lateralis
E. External oblique
F. Pectoralis major
G. Trapezius
H. Deltoid
I. Brachialis
J. Sartoris
For #32-35 Label the following muscles:
32.
33.
34.
35.
KEY:
A. Trapezius
B. Sternocleidomastoid
C. Teres major
D. Triceps brachii
E. Biceps brachii
F. Latissimus dorsi
G. Gluteus medius
H. Gluteus maximus
I. Longissimus thoracis