LooseLeaf for Human Anatomy
5th Edition
ISBN: 9781259285271
Author: Michael McKinley Dr., Valerie O'Loughlin, Elizabeth Pennefather-O'Brien
Publisher: McGraw-Hill Education
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Question
Chapter 10, Problem 6MC
Summary Introduction
Introduction:
The formation of skeletal muscle fibers is carried out with the help of embryonic muscle cells known as myoblasts. The development of skeletal muscles starts in the fourth week of development of gestation period from paraxial mesoderm. It forms the structures called somites.
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Smooth muscles differ from skeletal and cardiac muscles in that they ________. a. lack myofibrils b. are under voluntary control c. lack myosin d. lack actin
Which of the following statements relating to the developmental aspects of muscles is false?
a. All muscle tissue types arise from myoblasts
b. Skeletal muscles become amitotic while smooth muscles regenerate throughout life
c. Sarcopenia begins by age 30 and is irreversible
d. Body strength per unit muscle mass is the same in both sexes
e. none of the above
Which of the following structures is located in the head region of the thick filament myosin?
a. actin binding site
b. ATP binding site
c. ATPase enzyme
d. all of the above
e. none of the above
In relaxed muscle, the myosin-binding site on actin is blocked by ________. a. titin b. troponin c. myoglobin d. tropomyosin
Chapter 10 Solutions
LooseLeaf for Human Anatomy
Ch. 10 - What are the properties of muscle tissue?Ch. 10 - List and describe the connective tissue components...Ch. 10 - Describe how muscle attachments are organized to...Ch. 10 - Compare and contrast myofibrils and myofilaments.Ch. 10 - Prob. 5WYLCh. 10 - Describe the structural relationship between a...Ch. 10 - Prob. 7WYLCh. 10 - Prob. 8WYLCh. 10 - Prob. 9WYLCh. 10 - List the three types of skeletal muscle fibers,...
Ch. 10 - Prob. 11WYLCh. 10 - Prob. 12WYLCh. 10 - Prob. 13WYLCh. 10 - Prob. 14WYLCh. 10 - Prob. 15WYLCh. 10 - Describe smooth muscle cell structure. What are...Ch. 10 - Prob. 1MCh. 10 - Prob. 1MCCh. 10 - Prob. 2MCCh. 10 - Prob. 3MCCh. 10 - The plasma membrane of a skeletal muscle fiber is...Ch. 10 - In a skeletal muscle fiber, a triad is composed of...Ch. 10 - Prob. 6MCCh. 10 - Prob. 7MCCh. 10 - Prob. 8MCCh. 10 - Prob. 9MCCh. 10 - Which of the following changes in skeletal muscles...Ch. 10 - Compare the roles of the three concentric layers...Ch. 10 - Prob. 2CRCh. 10 - Prob. 3CRCh. 10 - Prob. 4CRCh. 10 - Describe in your own words the events that occur...Ch. 10 - Prob. 6CRCh. 10 - Briefly describe the differences between muscle...Ch. 10 - Explain why athletes who excel at short sprints...Ch. 10 - Prob. 9CRCh. 10 - Describe the structure of intercalated discs in...Ch. 10 - Prob. 1DCRCh. 10 - Prob. 2DCRCh. 10 - Prob. 3DCR
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- Skeletal muscle cells are a. large multinucleate cells that arise by growth. b. large multinucleate cells that arise by fusion of smaller cells. c. small cells connected by many gap junctions. d. large cells with a single nucleus.arrow_forwardAt low intracellular Ca2+ concentration, _________________ the active sites on the thin actin filament. a. troponin blocks b. troponin exposes c. tropomyosin blocks d. tropomyosin exposes e. a and carrow_forwardWhich of the following statements is false?a. Slow fibers have a small network of capillaries.b. Slow fibers contain the pigment myoglobin.c. Slow fibers contain a large number of mitochondria.d. Slow fibers contract for extended periods.arrow_forward
- The cells of muscles, myocytes, develop from________.a. myoblastsb. endodermc. fibrocytesd. chondrocytesarrow_forwardburst of Calchu musc res an ldum Which of the following is true concerning the role of Calcium in the contraction of muscle- cells? 20. A. skeletal muscle cells require a burst of calcium from the sarcoplasmic reticulum. B. smooth muscle cells require a burst of calcium from the sarcoplasmic reticulum. C. cardiac muscle cells require a burst of calcium from the sarcoplasmic reticulum. D. All of the above are correct. to an ent. response to an ertraceil m-currentarrow_forwardThe action potential of skeletal muscle A. is not essential for contraction. B. is longer than the action potential of cardiac muscle. C. has a prolonged plateau phase. D. causes the immediate uptake of calcium ions into the lateral sacs of the sarcoplasmic reticulum. E. spreads inward to all parts of the muscle via the T tubules.arrow_forward
- What event causes a troponin-tropomyosin complex to regain its original shape in muscle relaxation? a. stimulation of ACh receptors b. diffusion of Na* back into transverse tubules c. return of Ca2+ into the sarcoplasmic reticulum d. breaking of the bond with tropomyosinarrow_forwardCompared with skeletal muscle, visceral smooth muscle a. has the same ability to be stretched. b. loses the ability to contract forcefully when stretched. C. maintains about the same tension, even when stretched. d. cannot maintain long, steady contractions. e. can accumulate a substantial oxygen deficitarrow_forwardFrom which embryonic cell type does muscle tissuedevelop?a. ganglion cellsb. myotube cellsc. myoblast cellsd. satellite cellsarrow_forward
- Cardiac muscles differ from skeletal muscles in thatthey ________.a. are striatedb. utilize aerobic metabolism c. contain myofibrilsd. contain intercalated discsarrow_forwardMuscle relaxation occurs when ________. a. calcium ions are actively transported out of the sarcoplasmic reticulum b. calcium ions diffuse out of the sarcoplasmic reticulum c. calcium ions are actively transported into the sarcoplasmic reticulum d. calcium ions diffuse into the sarcoplasmic reticulumarrow_forwardThe type of muscle cell under voluntary control is the ________. a. smooth muscle b. skeletal muscle c. cardiac muscle d. visceral musclearrow_forward
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