EP CONNECT ONLINE ACCESS FOR BIOLOGY
20th Edition
ISBN: 9781260494655
Author: Raven
Publisher: MCG COURSE
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Chapter 45, Problem 1U
Exoskeletons and endoskeletons differ in that
a. an exoskeleton is rigid, and an endoskeleton is flexible.
b. endoskeletons are found only in vertebrates.
c. exoskeletons are composed of calcium, and endoskeletons are built from chitin.
d. exoskeletons are external to the soft tissues, and endoskeletons are internal.
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How do bones enable muscles to move a body part?
A.
They support the entire length of muscles.
B.
They protect the muscles from the environment.
C.
They provide new cells for muscles when needed.
D.
They serve as places to anchor or attach muscles.
E.
All of the above answer choices correctly answer the question.
During contraction, the bulk of calcium comes from:
A.
sarcomere
B.
sarcoplasm
C.
sarcoplasmic reticulum
D.
sarcolemma
Coming off of the M line are _________ fibers and extending off of the Z line are __________ fibers.
A.
troponin; tropomyosin
B.
actin; myosin
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myosin; actin
D.
tropomyosin; actin
E.
myosin; tropomyosin
Which of the following statements is true of the chameleon tongue but not of the human tongue?
A. It is a muscular hydrostat.
B. Force generation reflects the binding of myosin crossbridges to actin thin filaments.
C. The organization of the actin and myosin filaments produces a regular pattern of bands, or
striations.
D. Gaps or holes in the Z-discs allow supercontraction (shortening beyond the normal limit).
E. All of the above statements are true of both the chameleon tongue and the human tongue.
Chapter 45 Solutions
EP CONNECT ONLINE ACCESS FOR BIOLOGY
Ch. 45.1 - Compare hydrostatic skeletons, exoskeletons, and...Ch. 45.1 - Explain how animals with hydrostatic skeletons...Ch. 45.2 - Prob. 1LOCh. 45.2 - Prob. 2LOCh. 45.2 - Prob. 3LOCh. 45.3 - Prob. 1LOCh. 45.4 - Prob. 1LOCh. 45.4 - Prob. 2LOCh. 45.4 - Prob. 3LOCh. 45.5 - Prob. 1LO
Ch. 45.5 - Describe how friction and gravity affect...Ch. 45.5 - Prob. 3LOCh. 45 - Prob. 1IQCh. 45 - Exoskeletons and endoskeletons differ in that a....Ch. 45 - Worms use a hydrostatic skeleton to generate...Ch. 45 - Bone develops by one of two mechanisms depending...Ch. 45 - Which of the following statements best describes...Ch. 45 - Motor neurons stimulate muscle contraction via the...Ch. 45 - Prob. 6UCh. 45 - If you wanted to study the use of ATP during a...Ch. 45 - Place the following events in the correct order....Ch. 45 - You take X-rays of two individuals. Ray has been a...Ch. 45 - You have identified a calcium storage disease in...Ch. 45 - How do the muscles move your hand through space?...Ch. 45 - How can osteocytes remain alive within bone? a....Ch. 45 - Swimming underwater using forelimbs for propulsion...Ch. 45 - If a drug inhibits the release of ACh, what will...Ch. 45 - Prob. 1SCh. 45 - Prob. 2SCh. 45 - The nerve gas methylphosphonofluoridic acid...Ch. 45 - If natural selection favors the evolution of wings...
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- Which of the following is true? Tendons join bone to bone Tendons join muscle to bone and other structures Ligaments join bone to bone Ligaments join muscle to bone and other structures a. and b. b. and c.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_forwardRigor mortis occurs following death because a. tropomyosin remains over the myosin binding sites of actin. b. myosin heads attach to actin and are not released due to lack of ATP. c. the myosin becomes misshapen. d. all of the Ca2+ remains within the sarcoplasmic reticulum.arrow_forward
- The sliding filament mechanism describes the process during which: a. actin and myosin slide relative to each other b. sarcomeres slide relative to each other c. troponin and tropomyosin slide relative to each other d. muscle fibers slide past each otherarrow_forwardWhich of the following is true? A) Tendons join bone to bone B E Tendons join muscle to bone and other structures Ligaments join bone to bone Ligaments join muscle to bone and other structures a. and b. b. and C. Questions Filter (12) Molvier OLarrow_forwardThe function of a ligament is to connect a. cartilage to bone.b. bone to bone.c. bone to muscle.d. muscle to muscle.arrow_forward
- Which of the following is the site of calcium ion storage within muscles? a. T tubules b. sarcoplasmic reticulum c. actin filaments d. myosin filamentsarrow_forwardWhat is released when myosin heads attach to actin filaments A. Phosphate B. ATP C. ADP D. Tropomyosinarrow_forwardExoskeletonsa. are typical of vertebrates.b. are hydrostatic.c. must be shed periodically.d. are moved by muscles attached to the outside of joints.arrow_forward
- What is the role of ATP in muscle function? a. ATP provides energy that enables myosin to form cross bridges with actin. b. ATP enables myosin to detach from actin. c. ATP provides energy to transport calcium back into storage. d. all of the abovearrow_forwardA. nerve cell releases neurotransmitter which stimulates the muscle cell: B. calcium is released from sarcoplasmic reticulum and floods sarcoplasm; C. sarcolemma is permeable to sodium allowing sodium to rush into cell; D. myosin forms cross-bridges to pull actin into the center of the sarcomere; E. sarcolemma depolarizes and conducts an action potential Put them in orderarrow_forwardAll of the following are functions of cartilage except a. cartilage serves as a site for hemopoiesis. b. cartilage provides support for soft tissue. c. cartilage forms the initial model in endochondral ossification. d. cartilage provides a smooth gliding surface at the end of bones in freely movable joints.arrow_forward
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