BIOS 150 Week 3 Quiz Exam 2 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The primary function of the muscular system is:
A. Protection
B. Movement
C. Digestion
D. Blood production
Correct Answer: B. Movement
Rationale: Muscles contract to move the body and its parts.
2. Skeletal muscles are:
A. Involuntary
B. Voluntary
C. Cardiac
D. Smooth
Correct Answer: B. Voluntary
Rationale: Under conscious control for movement.
,3. Cardiac muscle is:
A. Voluntary
B. Involuntary
C. Smooth
D. Skeletal
Correct Answer: B. Involuntary
Rationale: Contracts automatically to pump blood.
4. Smooth muscle is found in:
A. Heart
B. Walls of hollow organs
C. Limbs
D. Skull
Correct Answer: B. Walls of hollow organs
Rationale: Controls movement of substances through organs.
5. The connective tissue covering a whole muscle is:
A. Endomysium
B. Perimysium
C. Epimysium
D. Sarcolemma
Correct Answer: C. Epimysium
Rationale: Dense sheath surrounding the entire muscle.
6. The connective tissue covering a muscle fascicle is:
,A. Epimysium
B. Perimysium
C. Endomysium
D. Sarcoplasm
Correct Answer: B. Perimysium
Rationale: Surrounds a bundle of muscle fibers (fascicle).
7. The connective tissue surrounding individual muscle fibers is:
A. Epimysium
B. Perimysium
C. Endomysium
D. Sarcolemma
Correct Answer: C. Endomysium
Rationale: Provides support and carries capillaries.
8. Muscle fiber plasma membrane is called:
A. Sarcoplasm
B. Sarcolemma
C. Sarcoplasmic reticulum
D. Myofibril
Correct Answer: B. Sarcolemma
Rationale: Encloses the muscle cell and transmits action potentials.
9. Cytoplasm of a muscle fiber is called:
, A. Sarcolemma
B. Sarcoplasm
C. Myofibril
D. Myofilament
Correct Answer: B. Sarcoplasm
Rationale: Contains organelles, glycogen, and myoglobin.
10. The functional unit of a muscle fiber is:
A. Myofibril
B. Sarcomere
C. Myofilament
D. Sarcolemma
Correct Answer: B. Sarcomere
Rationale: Segment between two Z-discs; contracts during muscle
activity.
11. The thick filament in a sarcomere is:
A. Actin
B. Myosin
C. Tropomyosin
D. Troponin
Correct Answer: B. Myosin
Rationale: Myosin heads interact with actin to generate contraction.
12. The thin filament in a sarcomere is:
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The primary function of the muscular system is:
A. Protection
B. Movement
C. Digestion
D. Blood production
Correct Answer: B. Movement
Rationale: Muscles contract to move the body and its parts.
2. Skeletal muscles are:
A. Involuntary
B. Voluntary
C. Cardiac
D. Smooth
Correct Answer: B. Voluntary
Rationale: Under conscious control for movement.
,3. Cardiac muscle is:
A. Voluntary
B. Involuntary
C. Smooth
D. Skeletal
Correct Answer: B. Involuntary
Rationale: Contracts automatically to pump blood.
4. Smooth muscle is found in:
A. Heart
B. Walls of hollow organs
C. Limbs
D. Skull
Correct Answer: B. Walls of hollow organs
Rationale: Controls movement of substances through organs.
5. The connective tissue covering a whole muscle is:
A. Endomysium
B. Perimysium
C. Epimysium
D. Sarcolemma
Correct Answer: C. Epimysium
Rationale: Dense sheath surrounding the entire muscle.
6. The connective tissue covering a muscle fascicle is:
,A. Epimysium
B. Perimysium
C. Endomysium
D. Sarcoplasm
Correct Answer: B. Perimysium
Rationale: Surrounds a bundle of muscle fibers (fascicle).
7. The connective tissue surrounding individual muscle fibers is:
A. Epimysium
B. Perimysium
C. Endomysium
D. Sarcolemma
Correct Answer: C. Endomysium
Rationale: Provides support and carries capillaries.
8. Muscle fiber plasma membrane is called:
A. Sarcoplasm
B. Sarcolemma
C. Sarcoplasmic reticulum
D. Myofibril
Correct Answer: B. Sarcolemma
Rationale: Encloses the muscle cell and transmits action potentials.
9. Cytoplasm of a muscle fiber is called:
, A. Sarcolemma
B. Sarcoplasm
C. Myofibril
D. Myofilament
Correct Answer: B. Sarcoplasm
Rationale: Contains organelles, glycogen, and myoglobin.
10. The functional unit of a muscle fiber is:
A. Myofibril
B. Sarcomere
C. Myofilament
D. Sarcolemma
Correct Answer: B. Sarcomere
Rationale: Segment between two Z-discs; contracts during muscle
activity.
11. The thick filament in a sarcomere is:
A. Actin
B. Myosin
C. Tropomyosin
D. Troponin
Correct Answer: B. Myosin
Rationale: Myosin heads interact with actin to generate contraction.
12. The thin filament in a sarcomere is:
