A. Neuromuscular junctionere a nerve cell contacts a muscle cell relaying a signal to contract in the form of an action potential isВ.C. Motor end plateAxon terminalsD.Sarcolemma36-Primary cilia present in endothelial cells, they exhibit a major role in the production of a potent vasodilator that isA. NO gasBSmooth muscles surrounding blood vesselsC. Skeletal muscles surrounding veinsD. 9+0 structure37-In the structure of microtubules doublets in the axoneme, all the tubules contain.wall in which ............ is a major component.A. Dynein arm, tektinB. Tubulin, tektinand they share aC. Tektin, Dynein armD. Nexin connection, interdoublet link38-The best-studied type of myosin motor protein isA.Myosin IIIt has two heavy chains with four light chains.B.Myosin VC.Myosin VID. Myosin X39-During cell crawling, the formation of a protrusion at the front of the cell is necessary for a cell to move forward.Two types of protrusions depending on actin dynamics. A thin wide sheet protrusion is calledwhile the slender pointed structure is calledA. Lamellipodium, filopodiumoB. Filopodium, lamellipodiumC. Leading edge, trailing edgeD. Trailing edge, leading edge40-Cytoplasmic dynein binding to the cargo that it carries is supported by another protein complex known asenoton ni moramni boxs 7-8)SLA. DynactinB. NexinC. Ankyrin and Tektin.D. Spectrin and Tektinconnected to a(n)41-A cilium is composed of a(n)_A. Axoneme, basal bodyB. doublets, basal plateC. Basal body, transition zoneD. Transition zone, basal bodymoves short distances but operate in large arrays to mediate muscle42-Two motor proteins involved in two different systems. They both walk along a protein filament or tubule andwalks alone while carryingboth of them use ATP hydrolysis to change their shape. Nevertheless,vesicles over large distances.contraction.A. Myosin II, Kinesin IB. Kinesin I, Myosin IIC. Kinesin I, Myosin V7B

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Scle cell relaying a signal to contract in the form of an action potential is Sarcolemma hd plate 36-Primary cilia present in endothelial cells, they exhibit a major role in the production of a potent vasodilator that is A. NO gas B. Smooth muscles surrounding blood vessels C. Skeletal muscles surrounding veins D. 9+0 structure 37-In the structure of microtubules doublets in the axonem wall in which.. is a major com A. Dynein arm, tektin Tubulin, tektin B. C. Tekti on

Scle cell relaying a signal to contract in the form of an action potential is Sarcolemma hd plate 36-Primary cilia present in endothelial cells, they exhibit a major role in the production of a potent vasodilator that is A. NO gas B. Smooth muscles surrounding blood vessels C. Skeletal muscles surrounding veins D. 9+0 structure 37-In the structure of microtubules doublets in the axonem wall in which.. is a major com A. Dynein arm, tektin Tubulin, tektin B. C. Tekti on

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter32: Structural Support And Movement

Section: Chapter Questions

Problem 13SA: Cheetahs and human sprinters tend to have a high proportion of ________fibers in their leg muscles....

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Similar questions

Which of the following is true of cardiac muscle? о а. Cardiac cells are electrically connected via intercalated disks o b. All of these statements are true It is the only type of tissue that produces spontaneous action potentials o d. It is made of multinucleate cells It lacks sarcoplasmic reticulum Ос. Ое.
Ans Column I Column II Ca binds to calmodulin 1. Elastic fibers that anchor thick filanments in place Ca binds to troponin 2. Occurs in smooth muscles only Oxidative type I muscle fibers 3. Is the primary source of Ca that drives muscle contraction Titin 4. Is a dense connective tissue that surrounds the entire muscle H zone 5. Anchors thin filaments together Z line 6. Have high concentration of mitochondria Sarcomere 7. The region of thick filaments that has no overlap with thin filaments Actin and myosin 8. Is the functional unit of skeletal muscle Epimysium 9. Occurs in skeletal and cardiac muscles Sarcoplasmic reticulum 10. Generate the mechanical force of a muscle through crossbridge cycling
Muscle Cell Anatomy O Which of the following is NOT performed by the plasmalemma? a. accommodating muscle fiber stretch b. conducting action potentials c. transporting nutrients into the muscle fiber d. storing Ca2+ ions to enable contraction O0000
Cardiomyocytes differ from skeletal muscle cells in that cardiomyocytes ______. A "do not have actin, myosin, or Z-disk " B do not have their actin and myosin arranged into sarcomeres and myofibrils C cannot have action potentials at a high enough frequency for tetani to occur D have fewer mitochondria and are more reliant on anaerobic respiration E All of the above are true of heart muscle cells
The EMG is a recording of: * The action potentials of the motor nerves supplying the muscle fibers. The action potentials of the innervated muscle fibers. The contractions of the innervated muscle fibers O The action potential of the pacemaker cells O The electrical activity in the sarcoplasmic reticulum
The layers of smooth muscle in blood vessels have what two, opposing functions? O None of these is correct O Pumping blood and lymphatic fluid Flexion and extension O Vasodilation and vasoconstriction O Increasing and decreasing flow velocity
Cardiac muscle cells produce more force when they have already shortened to less A than half of their resting length when they are stimulated more calcium is released into the fluid B around their actin and myosin filaments they are stimulated to contract before C their refractory period has ended more acetylcholine is released from D nearby neurons
cells/fibers A muscle contraction occurs when the "heads" on the an't find the bind to the "binding-sties" on the Is the name of the tore located on 18. thookg A. actin filaments : myosin filaments B. thin filaments : thick filaments C. myosin filaments : actin filaments D. troponin filaments : tropomyosin filaments
Cardiac muscle cells produce more force when _____. A they have already shortened to less than half of their resting length when they are stimulated B more calcium is released into the fluid around their actin and myosin filaments C they are stimulated to contract before their refractory period has ended D more acetylcholine is released from nearby neurons
An important protein in contractile muscle. O A. keratin O B. O c. O D. myosin elastin fibrin 25
Which of the following properties is not common to allthree muscle tissues?a. excitabilityb. the need for ATPc. at rest, uses shielding proteins to cover actinbindingsitesd. elasticity
burst 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-current