BIOL 251 Anatomy and Physiology I Exam 3 - Chapters 9 and
10 with 120 Questions and Correct Answers Graded A+/ BSU
Biol 251 A & P I Exam 3 Review 2026-2027
Section 1: Muscle Tissue & Characteristics (Q1–20)
Q1. What percentage of total body mass does muscle tissue account for?
A) 20–30%
B) 40–50%
C) 60–70%
D) 75–85%
Answer: B
Rationale: Muscle tissue is the most abundant tissue in the body, making up
nearly half of body mass.
Q2. Which type of muscle tissue is described as "elongated cells with striations,
voluntary control, and rapid contraction"?
A) Cardiac muscle
B) Smooth muscle
C) Skeletal muscle
D) Visceral muscle
Answer: C
Rationale: Skeletal muscle fibers are long, striated, and under conscious
(voluntary) control, though they fatigue easily.
Q3. Which muscle type is located only in the walls of the heart and is striated but
involuntary?
A) Skeletal muscle
B) Cardiac muscle
C) Smooth muscle
D) Multiunit smooth muscle
,Answer: B
Rationale: Cardiac muscle is found exclusively in the heart; it is striated like
skeletal muscle but contracts involuntarily and does not require nervous
stimulation to beat.
Q4. Smooth muscle is typically found in the walls of:
A) Bones
B) Hollow visceral organs (e.g., stomach, intestines)
C) The heart
D) Skeletal attachment points
Answer: B
Rationale: Smooth muscle lacks striations and is found in the walls of hollow
organs such as the stomach, intestines, bladder, and blood vessels; it is
involuntary.
Q5. Which characteristic of muscle tissue refers to its ability to receive and
respond to stimuli?
A) Contractility
B) Extensibility
C) Elasticity
D) Excitability
Answer: D
Rationale: Excitability (also called responsiveness) is the ability of muscle tissue to
detect and respond to nerve signals or chemical stimuli.
Q6. The ability of a muscle to shorten forcibly when stimulated is called:
A) Excitability
B) Contractility
C) Extensibility
D) Elasticity
,Answer: B
Rationale: Contractility is the unique ability of muscle cells to shorten and
generate pulling force.
Q7. A muscle's ability to be stretched or extended without damage is known as:
A) Elasticity
B) Contractility
C) Extensibility
D) Conductivity
Answer: C
Rationale: Extensibility allows muscles to stretch when needed, such as when
opposing muscles contract.
Q8. After being stretched, a muscle's ability to return to its original resting length
is called:
A) Elasticity
B) Plasticity
C) Extensibility
D) Contractility
Answer: A
Rationale: Elasticity ensures the muscle recoils to its resting length after being
stretched, maintained by connective tissue and cellular components.
Q9. Which of the following muscle types can contract without nervous system
stimulation?
A) Skeletal muscle only
B) Cardiac and smooth muscle
C) Skeletal and cardiac muscle
D) Only smooth muscle
Answer: B
Rationale: Both cardiac and smooth muscles are involuntary and can generate
, their own action potentials (automaticity), whereas skeletal muscle requires
nervous input.
Q10. The dense irregular connective tissue that surrounds an entire skeletal
muscle is the:
A) Endomysium
B) Perimysium
C) Epimysium
D) Sarcolemma
Answer: C
Rationale: The epimysium is the outermost connective tissue layer that surrounds
the whole muscle and may blend with deep fascia.
Q11. Which connective tissue layer surrounds an individual muscle fiber (cell)?
A) Epimysium
B) Perimysium
C) Endomysium
D) Fascia
Answer: C
Rationale: The endomysium is a thin layer of areolar connective tissue that wraps
each individual muscle fiber.
Q12. A fascicle is defined as:
A) A single muscle fiber
B) A bundle of muscle fibers surrounded by perimysium
C) The entire muscle belly
D) A connective tissue attachment to bone
Answer: B
Rationale: Fascicles are visible bundles of muscle fibers, each wrapped in
perimysium, that together form the whole muscle.
10 with 120 Questions and Correct Answers Graded A+/ BSU
Biol 251 A & P I Exam 3 Review 2026-2027
Section 1: Muscle Tissue & Characteristics (Q1–20)
Q1. What percentage of total body mass does muscle tissue account for?
A) 20–30%
B) 40–50%
C) 60–70%
D) 75–85%
Answer: B
Rationale: Muscle tissue is the most abundant tissue in the body, making up
nearly half of body mass.
Q2. Which type of muscle tissue is described as "elongated cells with striations,
voluntary control, and rapid contraction"?
A) Cardiac muscle
B) Smooth muscle
C) Skeletal muscle
D) Visceral muscle
Answer: C
Rationale: Skeletal muscle fibers are long, striated, and under conscious
(voluntary) control, though they fatigue easily.
Q3. Which muscle type is located only in the walls of the heart and is striated but
involuntary?
A) Skeletal muscle
B) Cardiac muscle
C) Smooth muscle
D) Multiunit smooth muscle
,Answer: B
Rationale: Cardiac muscle is found exclusively in the heart; it is striated like
skeletal muscle but contracts involuntarily and does not require nervous
stimulation to beat.
Q4. Smooth muscle is typically found in the walls of:
A) Bones
B) Hollow visceral organs (e.g., stomach, intestines)
C) The heart
D) Skeletal attachment points
Answer: B
Rationale: Smooth muscle lacks striations and is found in the walls of hollow
organs such as the stomach, intestines, bladder, and blood vessels; it is
involuntary.
Q5. Which characteristic of muscle tissue refers to its ability to receive and
respond to stimuli?
A) Contractility
B) Extensibility
C) Elasticity
D) Excitability
Answer: D
Rationale: Excitability (also called responsiveness) is the ability of muscle tissue to
detect and respond to nerve signals or chemical stimuli.
Q6. The ability of a muscle to shorten forcibly when stimulated is called:
A) Excitability
B) Contractility
C) Extensibility
D) Elasticity
,Answer: B
Rationale: Contractility is the unique ability of muscle cells to shorten and
generate pulling force.
Q7. A muscle's ability to be stretched or extended without damage is known as:
A) Elasticity
B) Contractility
C) Extensibility
D) Conductivity
Answer: C
Rationale: Extensibility allows muscles to stretch when needed, such as when
opposing muscles contract.
Q8. After being stretched, a muscle's ability to return to its original resting length
is called:
A) Elasticity
B) Plasticity
C) Extensibility
D) Contractility
Answer: A
Rationale: Elasticity ensures the muscle recoils to its resting length after being
stretched, maintained by connective tissue and cellular components.
Q9. Which of the following muscle types can contract without nervous system
stimulation?
A) Skeletal muscle only
B) Cardiac and smooth muscle
C) Skeletal and cardiac muscle
D) Only smooth muscle
Answer: B
Rationale: Both cardiac and smooth muscles are involuntary and can generate
, their own action potentials (automaticity), whereas skeletal muscle requires
nervous input.
Q10. The dense irregular connective tissue that surrounds an entire skeletal
muscle is the:
A) Endomysium
B) Perimysium
C) Epimysium
D) Sarcolemma
Answer: C
Rationale: The epimysium is the outermost connective tissue layer that surrounds
the whole muscle and may blend with deep fascia.
Q11. Which connective tissue layer surrounds an individual muscle fiber (cell)?
A) Epimysium
B) Perimysium
C) Endomysium
D) Fascia
Answer: C
Rationale: The endomysium is a thin layer of areolar connective tissue that wraps
each individual muscle fiber.
Q12. A fascicle is defined as:
A) A single muscle fiber
B) A bundle of muscle fibers surrounded by perimysium
C) The entire muscle belly
D) A connective tissue attachment to bone
Answer: B
Rationale: Fascicles are visible bundles of muscle fibers, each wrapped in
perimysium, that together form the whole muscle.
