ANATOMY APR+PHILS F/HUMAN ANATOMY(LL)
5th Edition
ISBN: 9781260412086
Author: McKinley
Publisher: MCG
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Chapter 4, Problem 9MC
Summary Introduction
Introduction: Muscle tissue is a soft tissue which is found in most of the animals. Their function is to produce force and motion. Each type of muscle tissue in the human body has a unique structure and a specific role.
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All of the following characteristics apply to skeletal muscle except
a. They are striated.
b. They are multinucleated.
c. They are voluntary.
d. They contain intercalated discs.
e. They are attached to the skeleton by means of tendons.
Which is a false statement about skeletal muscle structure?a. A myofibril is composed of multiple muscle fibers.b. Most skeletal muscles attach to bones by connective-tissue tendons.c. Each end of a thick filament is surrounded by six thin filaments.d. A cross-bridge is a portion of the myosin molecule.e. Thin filaments contain actin, tropomyosin, and troponin.
In muscle cells, magnesium ions compete with calcium ions for binding sites on troponin molecules. If a person has too high a concentration of magnesium ions in the blood, magnesium ions can prevent calcium ions from binding troponin.
A) What effect would this have on muscle contraction (strengthen, weaken, or no effect)?
B) Use your knowledge of how muscle fibers contract to explain your answer in part A.
Chapter 4 Solutions
ANATOMY APR+PHILS F/HUMAN ANATOMY(LL)
Ch. 4 - Prob. 1WYLCh. 4 - Prob. 2WYLCh. 4 - Prob. 3WYLCh. 4 - What two main characteristics are used to classify...Ch. 4 - Why is one epithelium referred to as...Ch. 4 - What are the two basic parts of a multicellular...Ch. 4 - Prob. 7WYLCh. 4 - What is the extracellular matrix? What are its...Ch. 4 - What three categories are used to classify...Ch. 4 - Identify the three types of protein fibers in...
Ch. 4 - Prob. 11WYLCh. 4 - What is the function of mucous membrane?Ch. 4 - Prob. 13WYLCh. 4 - What type of muscle tissue has long, cylindrical,...Ch. 4 - Prob. 15WYLCh. 4 - What general name is applied to the supporting...Ch. 4 - Match each numbered item with the most closely...Ch. 4 - Prob. 1MCCh. 4 - Prob. 2MCCh. 4 - Prob. 3MCCh. 4 - Prob. 4MCCh. 4 - Prob. 5MCCh. 4 - Prob. 6MCCh. 4 - Prob. 7MCCh. 4 - Prob. 8MCCh. 4 - Prob. 9MCCh. 4 - A gland that releases its secretion from secretory...Ch. 4 - What are some common characteristics of all types...Ch. 4 - Prob. 2CRCh. 4 - List the epithelial type that is found a lining...Ch. 4 - Prob. 4CRCh. 4 - What characteristics are common to all connective...Ch. 4 - What are the main structural differences between...Ch. 4 - In what regions of the body would you expect...Ch. 4 - Prob. 8CRCh. 4 - Prob. 9CRCh. 4 - Prob. 10CRCh. 4 - Prob. 1DCRCh. 4 - Prob. 2DCR
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- What kind of muscle tissue is found surrounding the urinary bladder? a. cardiac b. skeletal c. striated d. smootharrow_forwardStriations are found in the cytoplasm of which type(s) of muscle tissue? Select all that apply. A. Skeletal muscle B. Cardiac muscle C. Smooth musclearrow_forwardWhich of the following does NOT have striated muscles? a. abdomen b. arm c. hamstring d. liverarrow_forward
- Skeletal, smooth, and cardiac muscle are similar in that they all _____. A are divided into motor units B require calcium in order to contract C undergo mitosis frequently to replace dead or damaged cells D have small round cells connected by gap junctionsarrow_forwardWhich statement is accurate about an agonist? a. It opposes the function of the prime mover. b. It is the primary muscle that produces a movement. c. It functions primarily to stabilize a joint. d. Its muscle fibers are always circular in structure.arrow_forwardSelect the best answer or answers from the choices given: The function of the T tubules in muscle contraction is to (a) make and store glycogen, (b) release Ca2+ into the cell interior and then pick it up again, (c) transmit the action potential deep into the muscle cells, (d) form proteinsarrow_forward
- Match the following features of the muscle tissue. 1 Muscle tissue function. 2 It is a voluntary muscle. 3 It is striated and located in the heart. 4 It is striated and attached to bones. A. Contraction and movement. B. Cardiac Muscle. C. Skeletal Muscle D. Skeletal musclearrow_forwardAfter a vigorous exercise, you may experience cramps in your leg muscles. Why does this happen?arrow_forwardWhich of the following statements is True?a. Tendons contract using the sliding filament mechanism.b. Tendons are composed primarily of cartilage fibers.c. Tendons attach bones to bones at joints.d. Tendons attach muscles to bone.arrow_forward
- Which of the following statements about skeletal muscle is CORRECT? Select one: a. An increase in Na+ concentration in the cytosol starts muscle filament sliding. b. The muscle is non-striated and involuntary. c. The muscle is involved in shivering thermogenesis. d. The muscle contracts in response to parasympathetic stimulation. e. The muscle contracts in response to hormones.arrow_forwardIf a drug caused a sudden release of large amounts of calcium in skeletal muscle, from which structure would the calcium come? A. Sarcosomes B. Sarcoplasmic reticulum C. Sarcolemma D. Epimysiumarrow_forwardWhich component is responsible for initially stimulating a muscle contraction? a. proteins b. electrochemical signals c. plasma membranes d. striationsarrow_forward
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