QUESTION 7The first heart sound is due to the:O closing of the atrioventricular valvesclosing of the semilunar (V-a) valvesO opening of the atrioventricular valvesO opening of the semilunar (V-a) valvesOQUESTION 8Which muscle types are innervated by motor neurons?O smootoh and cardiacO only smoothOcardiac and skeletalO only skeletalO smooth, cardiac, and skeletalO smooth and skeletalO only cardiac

Heart, is the main organ of circulatory system in vertebrates, It is located on the ventral side of…

The first heart sound is due to the: closing of the atrioventricular valves O closing of the semilunar (V-a) valves opening of the atrioventricular valves opening of the semilunar (V-a) valves QUESTION 8 Which muscle types are innervated by motor neurons? O smootoh and cardiac O only smooth O cardiac and skeletal O only skeletal Osmooth, cardiac, and skeletal O smooth and skeletal O only cardiac

The first heart sound is due to the: closing of the atrioventricular valves O closing of the semilunar (V-a) valves opening of the atrioventricular valves opening of the semilunar (V-a) valves QUESTION 8 Which muscle types are innervated by motor neurons? O smootoh and cardiac O only smooth O cardiac and skeletal O only skeletal Osmooth, cardiac, and skeletal O smooth and skeletal O only cardiac

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter31: Animal Tissues And Organ Systems

Section: Chapter Questions

Problem 8SQ: ______ muscle pulls on bones and _______ muscle regulates the diameter of blood vessels. a. Skeletal...

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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.
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Table1.Contractionofsmoothmusclebythreeagonists Contractileresponse(mm) Loglagonist] (M) -10 -9 -8.5 -8 -7.5 -7 -6.5 -6 -5.5 -5 -4.5 -4 agonist-1 0.2 1.8 4 9.8 14.8 18 19.6 19.4 20 20 20 20 agonist-2 0.2 1 2.6 4 7.6 8.8 9.6 9.8 10 10 agonist-3 0.2 2 5.2 10 14.8 18 19.6 20 a) Experiments were performed on the contraction of smooth muscleusingincreasingconcentrationsofthreeagonistsandtherespo nsesare given in Table 1. The maximum response of the system was 20mm contraction. Calculate the % maximum response of the systemforeachconcentrationofagonistandplotgraphsshowingthede pendence of the response on log [agonist]. Compare the threeagonists in terms of their maximal effect and their potency usingpharmacologicalterms. EIN 5
Question 1 In a NMJ, what happens to the sarcolemma when acetylcholine is released into the synpatic cleft? allow influx of sodium ions and trigger action potential in muscle fiber allow influx of calcium ions and trigger action potential in muscle fiber allow influx of calcium ions and trigger release of another neurotransmitter into the sarcoplasm allow influx of sodium ions and trigger release of another neurotransmitter into the sarcoplasm
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