PALOMAR COLLEGE
Life Sciences Department
Introduction to Anatomy & Physiology (Zoo145); Instructor: Elmar Schmid, Ph.D.
Q U I I Z # 5
- Muscular System I -
 Answer the following questions and mark it on a Scantron 882 answer sheet. All questions must be answered by the student without help by class mates, friends or other human beings. Please read the following statement below carefully and sign it if you satisfy the guidelines outlined in this statement. This signed take home exercise sheet must be turned in with your answer sheet to receive full credit for this assignment. This assignment is due at the first class meeting the following week.

I HAVE ANSWERED THE QUESTIONS IN THIS EXERCISE ON MY OWN. I DID NOT CONSULT OTHERS OR
IN ANY CONDUCT IN ANY ACTIVITITES THAT COULD BE CONSTRUED AS CHEATING IN THIS
ASSIGNMENT. I DID NOT MAKE ANY COPIES OF THIS ASSIGNMENT.
_________________________________
(PRINT YOUR NAME)
________________________________
(YOUR SIGNATURE)
Q. 1: Which of the following is/are (a) function(s) of muscle tissue?
A) Heat production
B) Regulation of organ volume, e.g. lungs
C) Maintenance of erect stance and posture
D) Movement of food through the GI tract
E) all of the above
Q. 2: Cardiac muscle tissue is striated, involuntary innervated and only found in the heart.
A) true B) false
Q. 3: The type of muscle tissue which is located in the walls of blood vessels and airways is called:
A) striated skeletal muscle
B) striated cardiac muscle
C) non-striated cardiac muscle
D) smooth muscle
E) flight muscle
Q. 4: The ring-like bands of smooth muscles which regulate the outflow of body liquids from hollow organs are called:
A) obturators
B) obstructors
C) sphincter
D) sphinx
E) occlusors
Q. 5: The connective tissue layers which help to hold several muscle fibers (cells) together is called:
A) perimysium
B) periosteum
C) fascia
D) articular cartilage
E) fascicle
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PALOMAR COLLEGE
Life Sciences Department
Introduction to Anatomy & Physiology (Zoo145); Instructor: Elmar Schmid, Ph.D.
Q. 6: The actual muscle cell is the long muscle fiber which contains several nuclei.
A) true B) false
Q. 7: The calcium-storing organelle of a muscle cell is called:
A) sarcoplasmic reticulum
B) sarcolemma
C) sarcoma
D) myofibril
E) endomysium
Q. 8: The oxygen-binding, reddish-colored protein which is found in high concentration in the sarcoplasm of a muscle fiber is called:
A) hemoglobin
B) myoglobin
C) keratin
D) immunoglobin
E) myosin
Q. 9: The sarcomeres are the basic functional (contractile) units of striated muscle fibers.
A) true B) false
Q. 10: The protein which makes up the thick filament of the sarcomere is called:
A) myoglobin
B) myosin
C) actin
D) keratin
E) troponin
Q. 11: Which of the following proteins is/are (a) component(s) of the thin filament of a typical muscle sarcomere?
A) actin
B) troponin
C) tropomyosin
D) myosin
E) all of them, except d
Q. 12: The portion of the sarcomere only composed of the thick filaments is the:
A) I band
B) A band
C) H zone
D) Z disc
E) none of the above
Q. 13: During muscle contraction the ____ filaments slide past the ____ filaments, as a consequence of the conformational movement of the heads of the ________ protein.
A) thick … thin … myosin
B) thick … thin … troponin
C) thin … thick … myosin
D) thin … thick … troponin
E) Z disc … thick … troponin
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PALOMAR COLLEGE
Life Sciences Department
Introduction to Anatomy & Physiology (Zoo145); Instructor: Elmar Schmid, Ph.D.
Q. 14: The sarcomere is the area between two
A) I bands
B) A bands
C) H zones
D) Z discs
E) B lines
Q. 15: The nerve cell which is in close contact with a unit of muscle fibers and triggers the processes leading to muscle contraction is called Schwann cell.
A) True B) False
Q. 16: The neurotransmitter released at the neuromuscular junction is
A) adrenaline
B) acetylcholine
C) glutamine
D) GABA
E) serotonin
Q. 17: Tunnel-like extensions of the sarcolemma into the muscle fiber are
A) sarcomeres
B) myofibrils
C) transverse tubules
D) tropomyosin
E) synaptic cleft
Q. 18: After activation of the acetylcholine receptor at the motor end plate of the muscle, a muscle action potential is triggered due to the influx of ________ ions into the muscle fiber.
A) sodium
B) potassium
C) calcium
D) chlorine
E) adrenaline
Q. 19: The bacteria-derived botulinum toxin which is widely used in the currently very fashionable anti-wrinkle Botox therapy prevents which of the following events at the neuromuscular junction
(NMJ)?
A) the synthesis of acetylcholine
B) the release of acetylcholine from the motor neuron
C) the degradation of acetylcholine in the synaptic cleft
D) the generation of muscle action potentials in the motoric endplate
E) the influx of calcium into the muscle cells
Q. 20: Which of the following substances is/are absolutely necessary for muscle contraction?
A) high calcium levels
B) ATP
C) potassium
D) creatine
E) both, a and b
Bonus Q.: Which of the following molecules is the reserve molecule for (ATP) energy in muscle cells?
A) ADP B) acetylcholine C) phosphocreatine D) glucose
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PALOMAR COLLEGE
Life Sciences Department
Introduction to Anatomy & Physiology (Zoo145); Instructor: Elmar Schmid, Ph.D.
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