BIOL 342-Gardner Exam 2 Questions with Correct Answers
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Course
Biol
Institution
Biol
Three main classes of muscle Correct Answer 1. skeletal muscle
2. smooth muscle
3. cardiac muscle
skeletal muscle Correct Answer connects bones and are used for complex coordinated activities
smooth muscle Correct Answer surround internal organs (large and small intestine) and large bloo...
BIOL 342-Gardner Exam 2 Questions with Correct Answers
Three main classes of muscle Correct Answer ✓✓ 1. skeletal muscle
2. smooth muscle
3. cardiac muscle
skeletal muscle Correct Answer ✓✓ connects bones and are used for complex coordinated activities
smooth muscle Correct Answer ✓✓ surround internal organs (large and small intestine) and large blood vessels, regulates blood pressure and flow, forms sphincters and produces contractions
cardiac muscle Correct Answer ✓✓ striated muscle of the heart, beats on its own, have a single nucleus, high in myoglobin and mitochondria, have intercalated discs (conduct action potentials)
Properties of muscular tissue Correct Answer ✓✓ excitability, contractility, extensibility, elasticity
isometric contraction Correct Answer ✓✓ muscle develops tension but does not shorten, flexing
isotonic contraction Correct Answer ✓✓ muscle shortens because muscle tension exceeds load, there is movement eccentric isotonic contraction Correct Answer ✓✓ lengthening of a muscle during a contraction, lowering the dumbbell
concentric isotonic contraction Correct Answer ✓✓ muscle shortens and
pulls on another structure, curl the dumbbell
skeletal muscle functions Correct Answer ✓✓ Produce skeletal movement Maintain body position
Support soft tissues
Guard openings
Maintain body temperature
Store nutrient reserves
Skeletal Muscle connective tissues Correct Answer ✓✓ epimysium, perimysium, endomysium
Epimysium Correct Answer ✓✓ separates muscles from surrounding tissue
Perimysium Correct Answer ✓✓ surrounds muscle fiber bundles (fascicles) Endomysium Correct Answer ✓✓ surrounds each individual muscle fiber
slow oxidative fibers Correct Answer ✓✓ contract slowly, have slow acting myosin ATPases, and are fatigue resistant, red color, help maintain posture, high amount in myoglobin
fast glycolytic fibers Correct Answer ✓✓ contract quickly, have fast myosin ATPase, intermediate fibers, fairly fatigue resistant, also red
fast oxidative glycolytic fibers Correct Answer ✓✓ largest fibers that fatigue very easily, high levels of glycogen and low levels of mitochondria and myoglobin, white
Transverse tubules (T-tubules) Correct Answer ✓✓ Transmit action potential through cell
Allow entire muscle fiber to contract simultaneously
Have same properties as sarcolemma
Myofribil Correct Answer ✓✓ bundles of protein filaments (myofilaments) which are responisble for muscle contraction
sarcoplasmic reticulum Correct Answer ✓✓ Organelle of the muscle fiber that stores calcium
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