Anatomical Models
Objective Questions
Objective Questions
Objective Questions
Objective Questions
100
What is the insertion of the
biceps brachii muscle?
a. olecranon process
b. coronoid process
c. radial tuberosity
d. head of the radius
e. shaft of the ulna
c. Radial tuberosity
100
True or False
The cell membrane in a muscle fiber is called the
sarcolemma.
True
100
Which event stimulates the release of neurotransmitter at a neuromuscular junction?
a. the conduction of a electric impulses along the T tubules.
b. the activation of actin binding sites for myosin
cross bridges.
c. the entry of calcium ions into the synaptic terminal.
d. the entry of sodium ions into the muscle fiber at the motor end plate.
e. the release of calcium ions from the sarcoplasmic reticulum.
c. the entry of calcium ions into the synaptic terminal
100
If a muscle fiber is continually stimulated before
complete relaxation, the muscle tension will
increase during each contraction wave. This is
called
a. a twitch
b. wave summation
c. complete tetanus
d. treppe
b. wave summation
100
All of the following muscles flex the wrist except
a. flexor carpi radialis
b. flexor carpi ulnaris
c. flexor digitorum superficialis
d. pronator teres
e. flexor digitorum profundus
d. pronator teres
200
Identify the muscle labeled A.
a. zygomaticus major
b. orbicularis oris
c. depressor anguli oris
d. orbicularis oculi
e. buccinator
e. buccinator
200
True or False
Skeletal muscle fibers are covered by a
connective tissue layer called the epimysium.
False
endomysium
200
Oxygen debt may occur if ____________
accumulates in muscles.
a. creatine phosphate
b. myoglobin
c. lactic acid
d. glycogen
e. ATP
c. lactic acid
200
During the recovery period, lactic acid is
converted to glucose in the
a. spleen
b. pancreas
c. gallbladder
d. liver
e. small intestine
d. liver
200
All the following muscles insert on the greater
trochanter except
a. gluteus maximus
b. gluteus medius
c. gluteus minimus
d. piriformis
e. obturator internus
a. gluteus maximus
300
Identify the function of the muscle
indicated by the pointer.
a. plantar flexion of the foot
b. dorsiflexion of the foot
c. eversion of the foot
d. inversion of the foot
e. extension of the leg
a. plantar flexion of the foot
300
True or False
In a skeletal muscle cell, a triad is composed of
two T tubules and one cistern.
False
one...two
300
Which one of the following statements provides the best definition of aerobic endurance?
a. The period of time in which a muscle cell cannot produce
enough ATP to meet its demands.
b. The point in time at which a muscle cells converts from
aerobic metabolism to anaerobic metabolism.
c. The period of time in which muscle cells are paying back the
oxygen debt.
d. The period of time in which muscle cells are producing most
of their ATP by utilizing aerobic metabolic pathways.
e. The period of time in which lactic acid accumulates in the
muscle cell.
d. The period of time in which muscle cells are producing most
300
During a muscle contraction, the external
tension refers to the stretching of all the
following structures except
a. tendons
b. the myofibrils
c. the epimysium
d. the perimysium
e. the endomysium
b. the myofibrils
400
Identify the muscle
in the green.
a. subscapularis
b. supraspinatus
c. teres minor
d. teres major
e. infraspinatus
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b. supraspinatus
400
When one does a deep knee bend, the
hamstring muscles contract isotonically, so that
the sarcomeres decrease in length. This is an
example of
a. an eccentric contraction.
b. a concentric contraction
c. an isometric contraction
b. a concentric contraction
400
During peak muscular activity
a. muscle cells are using fatty acids as their
primary source to produce
ATP aerobically.
b. muscle cells are producing most of their ATP
anaerobically.
c. glycogen reserves in the muscle cells are
being
used as a source of glucose.
d. both (b) and (c) are correct.
e. (a), (b), and (c) are correct.
d. both (b) and (c) are correct.
400
At a neuromuscular junction, vesicles release
neurotransmitter when __________ ions enter
the synaptic terminal.
a. sodium
b. potassium
c. hydrogen
d. chlorine
e. calcium
e. calcium
500
What is the function of the femoris longus?
a. flexion of the thigh
b. lateral rotation of the thigh
c. extension of the leg
d. flexion of the leg
e. medial rotation of the thigh
d. flexion of the leg
500
A sarcomere is the region between two
a. Z lines
b. M lines
c. A bands
d. I bands
e. H bands
a. Z lines
500
A muscle fiber is given a threshold stimulation
and begins to contract. A second threshold
stimulation is applied but a second contraction
does not occur. The second stimulation occurred
during the
a. the refractory period
b. the period of relaxation
c. the latent period
d. the period of stimulation
a. the refractory period
500
All of the following muscles elevate the scapula
except
a. rhomboid minor
b. levator scapulae
c. pectoralis minor
d. rhomboid major
e. superior fibers of trapezius
c. pectoralis minor