BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 26, Problem 9MCQ
Summary Introduction
Introduction:
Skeleton is a hard structure that protects the internal organs of a living organism. A system, composing bones, muscles, and other tissues that help in the movement and locomotion in an individual, is called a skeletal system.
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Which of the following sentences is NOT correct?
A. White fibers make up fast-twitch muscle
B. Muscle spindle is a type of receptor that detects muscle length
C. Exocrine gland secretes its product directly into the bloodstream
D. When an action potential is generated within a motor neuron, every muscle cell of the motor unit is
stimulated to contract
A decline in a skeletal muscle's ability to maintain a constant level of force or tension after prolonged repetitive stimulations is called
A. complete tetanus
B. recruitment
C. fatique
D. rigor mortis
Which of the following is true?
A. Muscle fibers either will contract with all the force possible under existing conditions or will not contract at all.
B. Skeletal muscles can contract with varying degrees of strength given different circumstances.
C. Muscle length does not have an effect on contractile strength.
D. Metabolic condition of the myocyte does not have an effect on contractile strength.
Chapter 26 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 26.1 - How do the skeletal and muscular systems interact?Ch. 26.1 - Prob. 2MCCh. 26.1 - Prob. 3MCCh. 26.2 - Prob. 1MCCh. 26.2 - Prob. 2MCCh. 26.3 - Prob. 1MCCh. 26.3 - Prob. 2MCCh. 26.3 - Prob. 3MCCh. 26.3 - Prob. 4MCCh. 26.3 - Prob. 5MC
Ch. 26.4 - Prob. 1MCCh. 26.4 - Prob. 2MCCh. 26.4 - Prob. 3MCCh. 26.4 - Prob. 4MCCh. 26.4 - Prob. 5MCCh. 26.5 - Prob. 1MCCh. 26.5 - What happens when a muscle cell can not generate...Ch. 26.6 - Prob. 1MCCh. 26.6 - Prob. 2MCCh. 26 - Prob. 1MCQCh. 26 - Prob. 2MCQCh. 26 - Prob. 3MCQCh. 26 - Prob. 4MCQCh. 26 - Prob. 5MCQCh. 26 - Prob. 6MCQCh. 26 - Prob. 7MCQCh. 26 - Prob. 8MCQCh. 26 - Prob. 9MCQCh. 26 - Distinguish among a hydrostatic skeleton, an...Ch. 26 - Explain the observation that animals with...Ch. 26 - Prob. 3WIOCh. 26 - Prob. 4WIOCh. 26 - Prob. 5WIOCh. 26 - Prob. 6WIOCh. 26 - Prob. 7WIOCh. 26 - Prob. 8WIOCh. 26 - Prob. 9WIOCh. 26 - How might your muscles lengthen when you stretch?...Ch. 26 - How do the effects of exercise or lack thereof...Ch. 26 - Prob. 12WIOCh. 26 - Search the Internet for disorders of the skeletal...Ch. 26 - What is role of calcium in bones? In muscle...Ch. 26 - The following table shows recent mens world-record...Ch. 26 - Prob. 1SLCh. 26 - Prob. 1PITCh. 26 - Prob. 2PITCh. 26 - Prob. 3PITCh. 26 - Prob. 4PIT
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- Which of the following effects result(s) from aging on the muscular system?a. Muscle mass declines.b. Slow-twitch fibers are affected most by aging.c. Fatigue occurs more quickly.d. Increased muscle tone limits stability.e. The gait lengthens and is slower.arrow_forwardWhich of the following statements best describes the sliding filament mechanism of muscle contraction? a. Actin and myosin filaments do not shorten, but rather, slide past each other. b. Actin and myosin filaments shorten and slide past each other. c. As they slide past each other, actin filaments shorten, but myosin filaments do not shorten. d. As they slide past each other, myosin filaments shorten, but actin filaments do not shorten.arrow_forwardThe power stroke of muscle contraction occurs as the myosin head pivots toward its tail and the thin filament slides along the length of the thick filament. A. true B. falsearrow_forward
- Which of the following statements relating to the factors affecting the force of muscle contraction is false? a. skeletal muscles contract strongest when the muscle fibers are 80-120% their resting length b. low frequency of stimulation generates decreased force c. larger muscle fibers can generate more tension to generate stronger contractions d. more motor units recruited causes stronger contractions e. none of the abovearrow_forwardThe release of which of the following minerals from muscle cell storage sites stimulates muscle contraction? A. Phosphorus B. Calcium C. Potassium D. Sodiumarrow_forwardWhen the length of the muscle stays the same but the force increases during contraction it is referred to as an: A. Isotonic Contraction B. Isometric Contraction C. Isotreppid Contraction D. Isochronal Contractionarrow_forward
- The series-elastic component of muscle contraction is responsible for a.increased muscle shortening to successive twitches. b.a time delay between contraction and shortening. c.the lengthening of muscle after contraction has ceased. d.all of these.arrow_forwardWhich of the following would most likely cause hypertrophy of skeletal muscle in the arms Select one: a. using a computer for most of your job b. muscle cramps due to poor hydration c. immobilization due to wearing a cast d. working out by lifting weights O O O Oarrow_forwardWhich of the following does NOT contribute to muscle fatigue?A. K+ accumulation B. ADP and phosphate accumulation C. depleted neurotransmitter D. depleted fuelarrow_forward
- A bacterial toxin is known to block the release of ACh at the motor end plate of skeletal muscle. Consequently, a. the skeletal muscle contracts with increasing force. b. the skeletal muscle contracts with increasing frequency. c. the ability to stimulate the muscle is impaired. d. other neurotransmitters would stimulate the muscle.arrow_forwardPut the following skeletal muscle contraction events in the order that they occur: a. The myosin head swivels toward the center of the sarcomere. b. Calcium ions are released from the sarcoplasmic reticulum and bind to troponin. c. An action potential is propagated along the sarcolemma and transverse tubules. d. Myosin binds to actin, forming crossbridges. e. Myosin heads bind ATP molecules and release from actin. f. Tropomyosin molecules are moved off active sites on actin. g. ATPase splits ATP, providing the energy to reset the myosin head.arrow_forwardWhich of the following does not cause muscular fatigue? a. ionic imbalance interfering excitation-contraction coupling b. prolonged exercise damaging sarcoplasmic reticulum c. total lack of ATP d. a and b e. b and carrow_forward
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