MCPHS ANATOMY AND PHYSIOLOGY Exam 3
Practice Questions and Answers 2026 |
Updated Exam Prep Pack | Grade A+
• Skeletal Muscle. CORRECT ANSWER: Voluntary muscle responsible for body
movement.
• Smooth Muscle. CORRECT ANSWER: Involuntary muscle in hollow organs and
vessels.
• Cardiac Muscle. CORRECT ANSWER: Striated muscle found only in the heart.
• Contractility. CORRECT ANSWER: Muscle's ability to shorten with force.
• Excitability. CORRECT ANSWER: Muscle's response to stimuli, usually from nerves.
• Extensibility. CORRECT ANSWER: Muscle's ability to stretch beyond resting length.
• Elasticity. CORRECT ANSWER: Muscle's ability to return to original length.
• Epimysium. CORRECT ANSWER: Connective tissue surrounding an entire muscle.
• Perimysium. CORRECT ANSWER: Connective tissue surrounding muscle fiber
bundles.
• Endomysium. CORRECT ANSWER: Connective tissue separating individual muscle
fibers.
• Fascicles. CORRECT ANSWER: Bundles of muscle fibers within a muscle.
• Motor Neurons. CORRECT ANSWER: Nerve cells that stimulate muscle contraction.
• Capillary Beds. CORRECT ANSWER: Surround muscle fibers, providing blood supply.
• Myoblasts. CORRECT ANSWER: Cells that fuse to form muscle fibers.
• Hypertrophy. CORRECT ANSWER: Increase in muscle fiber size after birth.
• Intercalated Disks. CORRECT ANSWER: Structures connecting cardiac muscle cells.
• Gap Junctions. CORRECT ANSWER: Allow electrical signals between cardiac muscle
cells.
• Caveolae. CORRECT ANSWER: Indentations in smooth muscle sarcolemma.
, • Calmodulin. CORRECT ANSWER: Protein that regulates myosin kinase in smooth
muscle.
• Myosin Phosphatase. CORRECT ANSWER: Enzyme that causes relaxation in smooth
muscle.
• Triad. CORRECT ANSWER: Structure formed by two terminal cisternae and T tubule.
• Sarcoplasmic Reticulum. CORRECT ANSWER: Stores calcium in muscle cells.
• Transverse Tubules. CORRECT ANSWER: Inward folds of sarcolemma into muscle
cell.
• Myofibrils. CORRECT ANSWER: Bundles of protein filaments causing muscle
contraction.
• Myofilaments. CORRECT ANSWER: Protein filaments responsible for muscle
contraction.
• Actin. CORRECT ANSWER: Thin myofilaments involved in muscle contraction.
• Myosin. CORRECT ANSWER: Thick myofilaments that interact with actin.
• Sarcomere. CORRECT ANSWER: Basic functional unit of muscle fiber.
• Z disk. CORRECT ANSWER: Attachment site for actin myofilaments.
• I bands. CORRECT ANSWER: Light regions containing Z disks and myosin ends.
• A bands. CORRECT ANSWER: Dark regions with overlapping actin and myosin.
• H zone. CORRECT ANSWER: Area in A band without actin overlap.
• M line. CORRECT ANSWER: Center of H zone stabilizing myosin.
• Tropomyosin. CORRECT ANSWER: Protein regulating actin's active sites.
• Troponin. CORRECT ANSWER: Complex regulating muscle contraction with calcium.
• Neuromuscular junction. CORRECT ANSWER: Synapse between motor neuron and
muscle fiber.
• Presynaptic terminal. CORRECT ANSWER: Axon terminal containing acetylcholine
vesicles.
Practice Questions and Answers 2026 |
Updated Exam Prep Pack | Grade A+
• Skeletal Muscle. CORRECT ANSWER: Voluntary muscle responsible for body
movement.
• Smooth Muscle. CORRECT ANSWER: Involuntary muscle in hollow organs and
vessels.
• Cardiac Muscle. CORRECT ANSWER: Striated muscle found only in the heart.
• Contractility. CORRECT ANSWER: Muscle's ability to shorten with force.
• Excitability. CORRECT ANSWER: Muscle's response to stimuli, usually from nerves.
• Extensibility. CORRECT ANSWER: Muscle's ability to stretch beyond resting length.
• Elasticity. CORRECT ANSWER: Muscle's ability to return to original length.
• Epimysium. CORRECT ANSWER: Connective tissue surrounding an entire muscle.
• Perimysium. CORRECT ANSWER: Connective tissue surrounding muscle fiber
bundles.
• Endomysium. CORRECT ANSWER: Connective tissue separating individual muscle
fibers.
• Fascicles. CORRECT ANSWER: Bundles of muscle fibers within a muscle.
• Motor Neurons. CORRECT ANSWER: Nerve cells that stimulate muscle contraction.
• Capillary Beds. CORRECT ANSWER: Surround muscle fibers, providing blood supply.
• Myoblasts. CORRECT ANSWER: Cells that fuse to form muscle fibers.
• Hypertrophy. CORRECT ANSWER: Increase in muscle fiber size after birth.
• Intercalated Disks. CORRECT ANSWER: Structures connecting cardiac muscle cells.
• Gap Junctions. CORRECT ANSWER: Allow electrical signals between cardiac muscle
cells.
• Caveolae. CORRECT ANSWER: Indentations in smooth muscle sarcolemma.
, • Calmodulin. CORRECT ANSWER: Protein that regulates myosin kinase in smooth
muscle.
• Myosin Phosphatase. CORRECT ANSWER: Enzyme that causes relaxation in smooth
muscle.
• Triad. CORRECT ANSWER: Structure formed by two terminal cisternae and T tubule.
• Sarcoplasmic Reticulum. CORRECT ANSWER: Stores calcium in muscle cells.
• Transverse Tubules. CORRECT ANSWER: Inward folds of sarcolemma into muscle
cell.
• Myofibrils. CORRECT ANSWER: Bundles of protein filaments causing muscle
contraction.
• Myofilaments. CORRECT ANSWER: Protein filaments responsible for muscle
contraction.
• Actin. CORRECT ANSWER: Thin myofilaments involved in muscle contraction.
• Myosin. CORRECT ANSWER: Thick myofilaments that interact with actin.
• Sarcomere. CORRECT ANSWER: Basic functional unit of muscle fiber.
• Z disk. CORRECT ANSWER: Attachment site for actin myofilaments.
• I bands. CORRECT ANSWER: Light regions containing Z disks and myosin ends.
• A bands. CORRECT ANSWER: Dark regions with overlapping actin and myosin.
• H zone. CORRECT ANSWER: Area in A band without actin overlap.
• M line. CORRECT ANSWER: Center of H zone stabilizing myosin.
• Tropomyosin. CORRECT ANSWER: Protein regulating actin's active sites.
• Troponin. CORRECT ANSWER: Complex regulating muscle contraction with calcium.
• Neuromuscular junction. CORRECT ANSWER: Synapse between motor neuron and
muscle fiber.
• Presynaptic terminal. CORRECT ANSWER: Axon terminal containing acetylcholine
vesicles.
