2026-2027 BIOS 252 EXAM 1 QUESTIONS
AND CORRECT ANSWERS | A+ GRADE
VERIFIED ANSWERS | CHAMBERLAIN
UNIVERSITY COLLEGE OF NURSING
The ___________ is a feature of smooth muscle that
allows for the actin and myosin to remain attached to one
another but no longer use up adenosine triphosphate
(ATP).
A. cross-bridge mechanism
B. latch-bridge mechanism
C. ratchet-bridge mechanism
D. calcium-bridge mechanism Correct Answer B. latch-
bridge mechanism
True or False: The myocytes of the smooth muscle have a
large size.
A. True
B. False Correct Answer B. False
Calcium in the extracellular fluid (ECF) is ____________
the cystol (intracellular fluid - ICF).
A. less concentrated than in
B. more concentrated than in
C. the same concentration as
D. without calcium like Correct Answer B. more
concentrated than in
What are the two types of smooth muscle tissue?
,A. Multi-unit and single-unit
B. Striated and non-striated
C. Regular and irregular
D. Involuntary and voluntary Correct Answer A. Multi-unit
and single-unit
Mechanically-gated channels must be activated by
__________.
A. stretch
B. chemicals like a neurotransmitter
C. opening randomly
D. depolarization of the sarcolemma Correct Answer A.
stretch
What is muscular dystrophy?
A. A viral infection
B. A genetic disorder
C. An autoimmune disease
D. A tumor in the muscle Correct Answer B. A genetic
disorder
During thermoregulation, your body is maintaining its
temperature. Which are paired correctly regarding this
homeostatic mechanism?
A. effectors; hypothalamus
B. receptors; skeletal muscles
C. effectors; skeletal muscles
D. receptors; sweat glands Correct Answer C. effectors;
skeletal muscles
,During muscular contraction, heat is generated as a by-
product of _______________ production.
A. ATP
B. ADP
C. phosphate
D. oxygen Correct Answer A. ATP
All of these are the products of cellular respiration except
what?
A. H2O
B. CO2
C. O2
D. ATP Correct Answer C. O2
Physical activity and regular exercise delay age-related
decreases in muscle mass.
A. True
B. False Correct Answer A. True
Duchenne Muscular Dystrophy (DMD) affects which
type(s) of muscle?
A. Cardiac only
B. Smooth only
C. Skeletal only
D. Skeletal and cardiac Correct Answer D. Skeletal and
cardiac
In myasthenia gravis, acetylcholine fails to bind to the
muscle sarcolemma. This eventually leads to the
__________________ .
A. ligand-gated channels not opening
, B. leakage channels being activated
C. excess release of acetylcholinesterase
D. receptors upgrading Correct Answer A. ligand-gated
channels not opening
What are the most common muscles affected in
myasthenia gravis?
A. Muscles of the back
B. Quadriceps femoris and hamstring muscles
C. Muscles of the arm
D. Muscles of the eyelids Correct Answer D. Muscles of
the eyelids
Muscles contribute to ________________ when we
shiver.
A. nociception
B. proprioception
C. thermoregulation
D. conduction Correct Answer C. thermoregulation
________________________ is an autoimmune disorder
where antibodies attach to the acetylcholine (ACh)
receptors on the sarcolemma.
A. Duchenne muscular dystrophy
B. Myasthenia gravis
C. Muscular dystrophy
D. Atrophy Correct Answer B. Myasthenia gravis
How many ATP are generated through cellular
respiration?
A. 50
AND CORRECT ANSWERS | A+ GRADE
VERIFIED ANSWERS | CHAMBERLAIN
UNIVERSITY COLLEGE OF NURSING
The ___________ is a feature of smooth muscle that
allows for the actin and myosin to remain attached to one
another but no longer use up adenosine triphosphate
(ATP).
A. cross-bridge mechanism
B. latch-bridge mechanism
C. ratchet-bridge mechanism
D. calcium-bridge mechanism Correct Answer B. latch-
bridge mechanism
True or False: The myocytes of the smooth muscle have a
large size.
A. True
B. False Correct Answer B. False
Calcium in the extracellular fluid (ECF) is ____________
the cystol (intracellular fluid - ICF).
A. less concentrated than in
B. more concentrated than in
C. the same concentration as
D. without calcium like Correct Answer B. more
concentrated than in
What are the two types of smooth muscle tissue?
,A. Multi-unit and single-unit
B. Striated and non-striated
C. Regular and irregular
D. Involuntary and voluntary Correct Answer A. Multi-unit
and single-unit
Mechanically-gated channels must be activated by
__________.
A. stretch
B. chemicals like a neurotransmitter
C. opening randomly
D. depolarization of the sarcolemma Correct Answer A.
stretch
What is muscular dystrophy?
A. A viral infection
B. A genetic disorder
C. An autoimmune disease
D. A tumor in the muscle Correct Answer B. A genetic
disorder
During thermoregulation, your body is maintaining its
temperature. Which are paired correctly regarding this
homeostatic mechanism?
A. effectors; hypothalamus
B. receptors; skeletal muscles
C. effectors; skeletal muscles
D. receptors; sweat glands Correct Answer C. effectors;
skeletal muscles
,During muscular contraction, heat is generated as a by-
product of _______________ production.
A. ATP
B. ADP
C. phosphate
D. oxygen Correct Answer A. ATP
All of these are the products of cellular respiration except
what?
A. H2O
B. CO2
C. O2
D. ATP Correct Answer C. O2
Physical activity and regular exercise delay age-related
decreases in muscle mass.
A. True
B. False Correct Answer A. True
Duchenne Muscular Dystrophy (DMD) affects which
type(s) of muscle?
A. Cardiac only
B. Smooth only
C. Skeletal only
D. Skeletal and cardiac Correct Answer D. Skeletal and
cardiac
In myasthenia gravis, acetylcholine fails to bind to the
muscle sarcolemma. This eventually leads to the
__________________ .
A. ligand-gated channels not opening
, B. leakage channels being activated
C. excess release of acetylcholinesterase
D. receptors upgrading Correct Answer A. ligand-gated
channels not opening
What are the most common muscles affected in
myasthenia gravis?
A. Muscles of the back
B. Quadriceps femoris and hamstring muscles
C. Muscles of the arm
D. Muscles of the eyelids Correct Answer D. Muscles of
the eyelids
Muscles contribute to ________________ when we
shiver.
A. nociception
B. proprioception
C. thermoregulation
D. conduction Correct Answer C. thermoregulation
________________________ is an autoimmune disorder
where antibodies attach to the acetylcholine (ACh)
receptors on the sarcolemma.
A. Duchenne muscular dystrophy
B. Myasthenia gravis
C. Muscular dystrophy
D. Atrophy Correct Answer B. Myasthenia gravis
How many ATP are generated through cellular
respiration?
A. 50
