Anatomy & Physiology Final Exam
Questions and Correct Answers with
Verified Solutions | New Update 2026
The basic structural and functional unit of a skeletal muscle
Sarcomere
To establish resting membrane potential
Potassium ions diffuse out of the cell.
During the process of muscle contraction, calcium ions bind to the
Troponin molecules
The structure blocking the myosin binding sites on the actin
Tropomyosin
During muscle contraction, which of these processes requires ATP?
*Calcium ions are moved back to the sarcoplasmic reticulum
,*Cross-bridges are released
*Heads of the myosin myofilament are bent toward the center of the
sarcomere.
*Heat is released
A muscle can contract with varying force because
Recruitment of additional motor units.
Slow twitch muscle fibers
A smaller, produce less force, fatigue very slowly, and have many mitochondria
and blood vessels.
Fast twitch muscle fibers
Are large, produce a lot of force, fatigue quickly, have a lower blood supply and
mitochondria
The antagonist of the biceps brachii
Triceps brachii
The antagonist of rectus femoris
Semimembranosus and biceps femoris
, The antagonist of tibialis anterior is
Gastrocnemius
The antagonist of rectus abdominis
Erector Spinae
Functions of the muscular system
Movement of the body
Maintenance of posture
Respiration
Production of body heat
Communication
Constriction of organs and vessels
Contraction of the heart
Muscles that act to aid or stabilize similar movements
Synergist
Acetylcholine is released from synaptic vesicles into the synaptic cleft, in
response to
Calcium ions entering the presynaptic terminal.
Questions and Correct Answers with
Verified Solutions | New Update 2026
The basic structural and functional unit of a skeletal muscle
Sarcomere
To establish resting membrane potential
Potassium ions diffuse out of the cell.
During the process of muscle contraction, calcium ions bind to the
Troponin molecules
The structure blocking the myosin binding sites on the actin
Tropomyosin
During muscle contraction, which of these processes requires ATP?
*Calcium ions are moved back to the sarcoplasmic reticulum
,*Cross-bridges are released
*Heads of the myosin myofilament are bent toward the center of the
sarcomere.
*Heat is released
A muscle can contract with varying force because
Recruitment of additional motor units.
Slow twitch muscle fibers
A smaller, produce less force, fatigue very slowly, and have many mitochondria
and blood vessels.
Fast twitch muscle fibers
Are large, produce a lot of force, fatigue quickly, have a lower blood supply and
mitochondria
The antagonist of the biceps brachii
Triceps brachii
The antagonist of rectus femoris
Semimembranosus and biceps femoris
, The antagonist of tibialis anterior is
Gastrocnemius
The antagonist of rectus abdominis
Erector Spinae
Functions of the muscular system
Movement of the body
Maintenance of posture
Respiration
Production of body heat
Communication
Constriction of organs and vessels
Contraction of the heart
Muscles that act to aid or stabilize similar movements
Synergist
Acetylcholine is released from synaptic vesicles into the synaptic cleft, in
response to
Calcium ions entering the presynaptic terminal.
