10/26/25, 8:37 AM Kine 433 Exam 2 2025 (Actual Exam) Questions with verified Answers (Latest Update 2025) UPDATE!! Flashcards | Quizlet
Kine 433 Exam 2 2025 (Actual Exam) Questions
with verified Answers (Latest Update 2025)
UPDATE!!
Save
Terms in this set (217)
1. Skeletal
What are the three types
2. Smooth
of muscle?
3. Cardiac
What is skeletal muscle Voluntary, surrounds bone, and is mediated by the
like? CNS
Involuntary, contracts and relaxes to regulate BP and
What is smooth muscle resistance to air flow, surrounds blood vessels
like? (vascular SM) and bronchioles (bronchiole SM), and is
mediated by the ANS
Involuntary, dense network of capillaries and
What is cardiac muscle
mitochondria, surrounds the heart, and is mediated by
like?
the ANS
_____ and _____ muscle are Cardiac; smooth
involuntary and regulated
by the ANS.
_____ muscle is voluntary Skeletal
and regulated by the CNS.
Muscle is composed of muscle fibers
many _____.
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,10/26/25, 8:37 AM Kine 433 Exam 2 2025 (Actual Exam) Questions with verified Answers (Latest Update 2025) UPDATE!! Flashcards | Quizlet
Muscle fibers vary in _____ contractile (ST vs. FT)
properties.
What does tendon do? Connects muscle to bone
What is the epimysium? Connective tissue that surrounds entire muscle
Connective tissue that surrounds individual muscle
What is the endomysium?
fibers
What is the perimysium? Connective tissue around bundles of muscle fibers
What is the fasciculus? Bundle of muscle fibers
What is the source of ATP Mitochondria
production?
What is the myofibril? Contractile element composed of actin and myosin
Membrane surrounding a muscle fiber and conducts
What is the plasmalemma?
the AP
What is the sarcoplasm? Intracellular fluid containing glycogen and myoglobin
What are the transverse Extensions of plasmalemma that transmits AP to
tubules (T-tubules)? individual myofibrils
The sarcoplasmic Ca2+
reticulum (SR) stores _____.
Muscle fibers range in 10-120
diameter from _____
micrometers.
Are muscle fibers Multinucleated
mononucleated or
multinucleated?
A _____ is the functional unit sarcomere
of a myofibril.
Thick filaments are myosin
composed of _____.
https://quizlet.com/1098503260/kine-433-exam-2-2025-actual-exam-questions-with-verified-answers-latest-update-2025-update-flash-cards/?new 2/18
, 10/26/25, 8:37 AM Kine 433 Exam 2 2025 (Actual Exam) Questions with verified Answers (Latest Update 2025) UPDATE!! Flashcards | Quizlet
Thin filaments are actin, tropomyosin, and troponin
composed of _____.
The "intent" to exercise brain (motor cortex)
arises in the _____.
Central command (CC) Muscle, CV, and respiratory system
activates what
simultaneously?
The _____ carries the AP alpha-motor neuron
from CNS to muscle
fibers.
An alpha-motor neuron motor unit
plus all muscle fibers it
innervates is a _____.
1. AP starts in the brain
2. Alpha-motor neuron releases ACh
3. ACh binds to nicotinic receptor
What are the 7 steps of
4. AP travels down T-tubules to SR
excitation-contraction
5. SR releases Ca2+
coupling?
6. Ca2+ binds to troponin and pulls tropomyosin off
active sites
7. Myosin head binds actin and tilts
Vesicles are filled with ACh
_____.
When the muscle is Ca2+
relaxed, intracellular _____ is
low.
When the muscle is active site
relaxed, the _____ is
blocked.
When the muscle is myosin; actin
relaxed, _____ is not bound
to _____.
https://quizlet.com/1098503260/kine-433-exam-2-2025-actual-exam-questions-with-verified-answers-latest-update-2025-update-flash-cards/?new 3/18
Kine 433 Exam 2 2025 (Actual Exam) Questions
with verified Answers (Latest Update 2025)
UPDATE!!
Save
Terms in this set (217)
1. Skeletal
What are the three types
2. Smooth
of muscle?
3. Cardiac
What is skeletal muscle Voluntary, surrounds bone, and is mediated by the
like? CNS
Involuntary, contracts and relaxes to regulate BP and
What is smooth muscle resistance to air flow, surrounds blood vessels
like? (vascular SM) and bronchioles (bronchiole SM), and is
mediated by the ANS
Involuntary, dense network of capillaries and
What is cardiac muscle
mitochondria, surrounds the heart, and is mediated by
like?
the ANS
_____ and _____ muscle are Cardiac; smooth
involuntary and regulated
by the ANS.
_____ muscle is voluntary Skeletal
and regulated by the CNS.
Muscle is composed of muscle fibers
many _____.
https://quizlet.com/1098503260/kine-433-exam-2-2025-actual-exam-questions-with-verified-answers-latest-update-2025-update-flash-cards/?new 1/18
,10/26/25, 8:37 AM Kine 433 Exam 2 2025 (Actual Exam) Questions with verified Answers (Latest Update 2025) UPDATE!! Flashcards | Quizlet
Muscle fibers vary in _____ contractile (ST vs. FT)
properties.
What does tendon do? Connects muscle to bone
What is the epimysium? Connective tissue that surrounds entire muscle
Connective tissue that surrounds individual muscle
What is the endomysium?
fibers
What is the perimysium? Connective tissue around bundles of muscle fibers
What is the fasciculus? Bundle of muscle fibers
What is the source of ATP Mitochondria
production?
What is the myofibril? Contractile element composed of actin and myosin
Membrane surrounding a muscle fiber and conducts
What is the plasmalemma?
the AP
What is the sarcoplasm? Intracellular fluid containing glycogen and myoglobin
What are the transverse Extensions of plasmalemma that transmits AP to
tubules (T-tubules)? individual myofibrils
The sarcoplasmic Ca2+
reticulum (SR) stores _____.
Muscle fibers range in 10-120
diameter from _____
micrometers.
Are muscle fibers Multinucleated
mononucleated or
multinucleated?
A _____ is the functional unit sarcomere
of a myofibril.
Thick filaments are myosin
composed of _____.
https://quizlet.com/1098503260/kine-433-exam-2-2025-actual-exam-questions-with-verified-answers-latest-update-2025-update-flash-cards/?new 2/18
, 10/26/25, 8:37 AM Kine 433 Exam 2 2025 (Actual Exam) Questions with verified Answers (Latest Update 2025) UPDATE!! Flashcards | Quizlet
Thin filaments are actin, tropomyosin, and troponin
composed of _____.
The "intent" to exercise brain (motor cortex)
arises in the _____.
Central command (CC) Muscle, CV, and respiratory system
activates what
simultaneously?
The _____ carries the AP alpha-motor neuron
from CNS to muscle
fibers.
An alpha-motor neuron motor unit
plus all muscle fibers it
innervates is a _____.
1. AP starts in the brain
2. Alpha-motor neuron releases ACh
3. ACh binds to nicotinic receptor
What are the 7 steps of
4. AP travels down T-tubules to SR
excitation-contraction
5. SR releases Ca2+
coupling?
6. Ca2+ binds to troponin and pulls tropomyosin off
active sites
7. Myosin head binds actin and tilts
Vesicles are filled with ACh
_____.
When the muscle is Ca2+
relaxed, intracellular _____ is
low.
When the muscle is active site
relaxed, the _____ is
blocked.
When the muscle is myosin; actin
relaxed, _____ is not bound
to _____.
https://quizlet.com/1098503260/kine-433-exam-2-2025-actual-exam-questions-with-verified-answers-latest-update-2025-update-flash-cards/?new 3/18
