ASU BIO 201 Exam 3 – Questions with Correct Answers 2026 | Complete Study Pack

ASU BIO 201 EXAM 3 QUESTIONS WITH gh gh gh gh gh gh




CORRECTANSWERS 2025 g
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3 kinds of muscle tissue - CORRECT ANSWER -skeletal, cardiac, smooth
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major purpose of muscle - CORRECT ANSWER -converting chemical energy in ATP --
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> mechanical energy of motion
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muscle functions - CORRECT ANSWER --movement of: whole body, body parts, organ contents
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-stability: maintain posture and prevent mvmt. gh gh gh gh gh




-communication: speech, facial expressions and writing gh gh gh gh gh




-control of openings and passageways: sphincters
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-body heat production gh gh




characterizations of connective tissues of a muscle - CORRECT ANSWER - gh gh gh gh gh gh gh gh gh gh




fascia, epimysium, perimysium, endomysium
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CT elements and how they merge with other tissues - CORRECT ANSWER -
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Tendons = attachments between muscle and bone, dense-
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regular CT made of collagen fibers, epimysium surrounding entire muscle is continuous with collagen fi
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bers of tendons
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role of collagen in connective tissues - CORRECT ANSWER -
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stretches slightly under tension and recoils when released
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-resists excessive stretching and protects muscle from injury
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-returns muscle to resting length gh gh gh gh




-contribute to power output and muscle efficiency gh gh gh gh gh gh




skeletal muscle shapes (with examples) - CORRECT ANSWER -Fusiform: biceps bracchi, gastrocnemius
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gh Triangular (convergent): pec major, temporalis gh gh gh gh




Parallel: rectus abdominus, zygomaticus major
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,Circular: orbicularis oculi, urethral and anal sphincters
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gh Pennate: rectus femoris, deltoid gh gh gh




ways in which muscle attach to bone - CORRECT ANSWER -Indirect: tendons attach muscle to bone
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gh Direct: fleshy attachment to bone
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Some skeletal muscles do not insert on bone, but in dermis of the skin
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how tendons attach muscle to bone - CORRECT ANSWER -collagen fibers fibers of endo-, peri-
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, and epimysium continue into the tendon, the tendon merges into the periosteum of bone
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-aponeurosis: tendon is a broad, flat sheet gh gh gh gh gh gh




origin and insertion definition - CORRECT ANSWER -
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Origin: bony attachment at stationary end of muscle
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Insertion: bony attachment to mobile end of muscle
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functional groups of muscles with example - CORRECT ANSWER -for elbow flexion
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gh Prime mover (agonist): brachialis
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Synergist: biceps brachii gh gh




gh Antagonist: triceps brachii gh gh




gh Fixator: rhomboideus gh




intrinsic vs extrinsic muscles - CORRECT ANSWER -
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Intrinsic: contained within a region (both origin and insertion there)
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gh Extrinsic: act on a designated regions, but has origins elsewhere
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characteristics of muscle - CORRECT ANSWER - gh gh gh gh gh gh




Responsiveness (excitability): to chemical signals, stretch and electrical changes across plasma membra
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Conductivity: local electrical change triggers a wave of excitation that travels along the muscle fiber
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gh Contractility: shortens when stimulated gh gh gh

, Extensibility: capable of being stretched between contractions
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gh Elasticity: returns to its original resting length after being stretched
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properties of skeletal muscle - CORRECT ANSWER -
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voluntary, straitaed muscle attached to one or more bones
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myofiber - CORRECT ANSWER -muscle cell/muscle fiber, composed of myofibrils
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myofibrils - CORRECT ANSWER - gh gh gh gh




long protein bundles that occupy the main portion of the interior of a muscle fiber, composed of myof
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ilaments
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myofilament - CORRECT ANSWER - gh gh gh gh




protein microfilament responsible for muscle cell contraction, composed of myosin or actin proteins
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functions of each part of a muscle fiber - CORRECT ANSWER -
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Sarcolemma: plasma membrane of a muscle fiber
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Sarcoplasm: cytoplasm of a muscle fiber gh gh gh gh gh




Mitochondria: packed in spaces between myofibrils gh gh gh gh gh




Sarcoplasmic reticulum (SR): smooth ER that forms a network around each myofibril-calcium reservoir
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gh Terminal cisternae: dilated end-sacs of SR which cross muscle fiber from one side to the other
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T tubules: tubular infoldings of the sarcolemma which penetrate through the cell and emerge on the o
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ther side
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Triad: a T tubule and 2 terminal cisterns
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Internal proteins: long protein bundles that occupy the main portion of the sarcoplasm
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gh Multiple nuclei: flattened nuclei pressed against the inside of the sarcolemma
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Glycogen and Myoglobin functions - CORRECT ANSWER -
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Glycogen: stored in abundance to provide energy with heightened exercise
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gh Myoglobin: red pigment that stores oxygen needed for muscle activity
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