BIOS 252 Exam 1 Review | Questions with 100% Verified
Answers | Latest Update 2026/2027
Question: Skeletal muscle shape
Answer: Long, thin, and cylindrical.
Question: Skeletal muscle nuclei
Answer: Multinucleated.
Question: Skeletal muscle location
Answer: Attached to bone and skin.
Question: Skeletal muscle control
Answer: Voluntary movement.
Question: Skeletal muscle striation status
Answer: Striated.
Question: Cardiac muscle shape
Answer: Short, fat, and branched.
Question: Cardiac muscle nuclei
Answer: Uninucleated.
Question: Cardiac muscle location
Answer: Found in the heart.
Question: Cardiac muscle junctions
Answer: Attached to intercalated discs.
Question: Cardiac muscle control
Answer: Involuntary (controlled by Autonomic Nervous System).
Question: Cardiac muscle striation status
Answer: Striated.
Question: Smooth muscle location
Answer: Found in hollow organs (except the heart).
,Question: Smooth muscle nuclei
Answer: Uninucleated.
Question: Smooth muscle control
Answer: Involuntary.
Question: Smooth muscle striation status
Answer: Lacks striations (non-striated).
Question: Muscle excitability
Answer: Ability to receive and respond to stimuli.
Question: Muscle conductivity
Answer: Ability to propagate electrical signals along the membrane.
Question: Muscle extensibility
Answer: Ability to stretch or extend without damage.
Question: Muscle elasticity
Answer: Ability to return to original shape after stretching.
Question: Muscle contractility
Answer: Ability to shorten forcibly when stimulated.
Question: Skeletal muscle function
Answer: Gross and fine movement of the body.
Question: Cardiac muscle function
Answer: Heartbeat (pumping blood).
Question: Smooth muscle function
Answer: Peristalsis.
Question: Exception to skeletal muscle voluntary control
Answer: Respiratory and ocular muscles.
Question: Neural control of cardiac muscle
Answer: Involuntary control by the Autonomic Nervous System (ANS).
, Question: Sarcolemma
Answer: The plasma membrane of a muscle fiber.
Question: Sarcoplasmic reticulum
Answer: Smooth endoplasmic reticulum of muscle fibers that stores calcium ions (Ca2+).
Question: Sarcomere
Answer: The functional contractile unit of a myofibril.
Question: Z-disc
Answer: Boundary of a sarcomere; anchors thin filaments.
Question: M-line
Answer: Center of the sarcomere; anchors thick filaments.
Question: A band
Answer: Dark band; represents the entire length of thick filaments.
Question: I band
Answer: Light band; contains thin filaments only.
Question: Zone of overlap
Answer: Region where thick and thin filaments overlap.
Question: Thick filament composition
Answer: Primarily made of the protein myosin.
Question: Thin filament composition
Answer: Primarily made of the protein actin.
Question: Contractile proteins of muscle
Answer: Actin and myosin.
Question: Regulatory proteins of muscle
Answer: Troponin and tropomyosin.
Question: Structural proteins of muscle
Answer: Proteins providing alignment, elasticity, and extensibility.
Answers | Latest Update 2026/2027
Question: Skeletal muscle shape
Answer: Long, thin, and cylindrical.
Question: Skeletal muscle nuclei
Answer: Multinucleated.
Question: Skeletal muscle location
Answer: Attached to bone and skin.
Question: Skeletal muscle control
Answer: Voluntary movement.
Question: Skeletal muscle striation status
Answer: Striated.
Question: Cardiac muscle shape
Answer: Short, fat, and branched.
Question: Cardiac muscle nuclei
Answer: Uninucleated.
Question: Cardiac muscle location
Answer: Found in the heart.
Question: Cardiac muscle junctions
Answer: Attached to intercalated discs.
Question: Cardiac muscle control
Answer: Involuntary (controlled by Autonomic Nervous System).
Question: Cardiac muscle striation status
Answer: Striated.
Question: Smooth muscle location
Answer: Found in hollow organs (except the heart).
,Question: Smooth muscle nuclei
Answer: Uninucleated.
Question: Smooth muscle control
Answer: Involuntary.
Question: Smooth muscle striation status
Answer: Lacks striations (non-striated).
Question: Muscle excitability
Answer: Ability to receive and respond to stimuli.
Question: Muscle conductivity
Answer: Ability to propagate electrical signals along the membrane.
Question: Muscle extensibility
Answer: Ability to stretch or extend without damage.
Question: Muscle elasticity
Answer: Ability to return to original shape after stretching.
Question: Muscle contractility
Answer: Ability to shorten forcibly when stimulated.
Question: Skeletal muscle function
Answer: Gross and fine movement of the body.
Question: Cardiac muscle function
Answer: Heartbeat (pumping blood).
Question: Smooth muscle function
Answer: Peristalsis.
Question: Exception to skeletal muscle voluntary control
Answer: Respiratory and ocular muscles.
Question: Neural control of cardiac muscle
Answer: Involuntary control by the Autonomic Nervous System (ANS).
, Question: Sarcolemma
Answer: The plasma membrane of a muscle fiber.
Question: Sarcoplasmic reticulum
Answer: Smooth endoplasmic reticulum of muscle fibers that stores calcium ions (Ca2+).
Question: Sarcomere
Answer: The functional contractile unit of a myofibril.
Question: Z-disc
Answer: Boundary of a sarcomere; anchors thin filaments.
Question: M-line
Answer: Center of the sarcomere; anchors thick filaments.
Question: A band
Answer: Dark band; represents the entire length of thick filaments.
Question: I band
Answer: Light band; contains thin filaments only.
Question: Zone of overlap
Answer: Region where thick and thin filaments overlap.
Question: Thick filament composition
Answer: Primarily made of the protein myosin.
Question: Thin filament composition
Answer: Primarily made of the protein actin.
Question: Contractile proteins of muscle
Answer: Actin and myosin.
Question: Regulatory proteins of muscle
Answer: Troponin and tropomyosin.
Question: Structural proteins of muscle
Answer: Proteins providing alignment, elasticity, and extensibility.
