Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 44, Problem 6TYU
Summary Introduction
Introduction: Nervous system is controlling the actions of the body. Neurotransmitters are the chemicals released in the nervous system that pass information in the form of signals from one neuron to other and ultimately to the brain. Norepinephrine is a neurotransmitter.
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Which of the following statements is false? a. The sympathetic nervous system releases epinephrine and norepinephrine, which are positive chronotropic and inotropic agents. b. The endocrine system regulates cardiac output through chronotropic and inotropic hormones and through hormones that regulate water balance .c. The parasympathetic nervous system releases acetylcholine,which is a strongly negative inotropic agent. d. Factors such as electrolyte concentrations, body temperature,and age all affect cardiac output.
Which one of the following statements about gap junctions or electrical synapses is incorrect? A. Abundant gap junctions between cardiac muscle cells allow coordinated waves of contraction to spread through the heart muscle. B. Synaptic delays at electrical synapses are shorter than synaptic delays at chemical synapses. C. Gap junctions at electrical synapses are formed from proteins made in both the presynaptic and postsynaptic cells. D. Electrical synapses can be either excitatory or inhibitory. E. Electrical synapses are inherently bidirectional, i.e., current can spread between two coupled cells in either direction
Please give me the correct answer quickly I will give you upvote
When comparing cardiac muscle cells and skeletal muscle cells,
Select one:
a. only skeletal muscle has a plateau phase in its contraction cycle.
b. both possess intercalated discs.
c. action potentials are conducted from cell to cell only in cardiac muscle.
d. both are voluntary.
e. the rate of action potential propagation is faster in cardiac muscle.
Chapter 44 Solutions
Biology (MindTap Course List)
Ch. 44.1 - Types of Circulatory Systems Contrast internal...Ch. 44.1 - Compare how oxygen is transported to the body...Ch. 44.1 - Prob. 2CCh. 44.1 - What are five functions of the vertebrate...Ch. 44.2 - Prob. 2LOCh. 44.2 - Summarize the sequence of events involved in blood...Ch. 44.2 - Prob. 1CCh. 44.2 - Prob. 2CCh. 44.2 - Prob. 3CCh. 44.3 - Prob. 4LO
Ch. 44.3 - Prob. 1CCh. 44.3 - Prob. 2CCh. 44.4 - Prob. 5LOCh. 44.4 - Prob. 1CCh. 44.5 - Prob. 6LOCh. 44.5 - Prob. 7LOCh. 44.5 - Prob. 8LOCh. 44.5 - Prob. 1CCh. 44.5 - PREDICT A patients mitral valve (left AV valve)...Ch. 44.5 - Prob. 3CCh. 44.6 - Prob. 9LOCh. 44.6 - Prob. 1CCh. 44.6 - Prob. 2CCh. 44.7 - Prob. 10LOCh. 44.7 - Prob. 1CCh. 44.7 - Prob. 2CCh. 44.8 - Prob. 11LOCh. 44.8 - Prob. 1CCh. 44.8 - Prob. 2CCh. 44.9 - Trace the progression of atherosclerosis and...Ch. 44.9 - Prob. 1CCh. 44.9 - Prob. 2CCh. 44 - Which of the following are most closely associated...Ch. 44 - Prob. 2TYUCh. 44 - Prob. 3TYUCh. 44 - Prob. 4TYUCh. 44 - Prob. 5TYUCh. 44 - Prob. 6TYUCh. 44 - Prob. 7TYUCh. 44 - Prob. 8TYUCh. 44 - Test Your Understanding 9. VISUALIZE Draw a simple...Ch. 44 - Prob. 10TYUCh. 44 - Prob. 11TYUCh. 44 - Prob. 12TYUCh. 44 - Test Your Understanding 13. SCIENCE, TECHNOLOGY,...
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- Neurotransmitters and their respective receptors influence the propagation of action potentials. Why does ACh release at skeletal muscles cause excitation and muscle contractions whereas ACh release at the heart causes inhibition and a slowing down of the heart rate and force of heart contractions? O the ACh released at skeletal muscles and the heart are not similar skeletal muscles have more ACh receptors the properties of the ACh receptors are different a and b « Previous Nextarrow_forwardGiven these characteristics:Matrix composed almost entirely of extracellular collagen fibers. It is able to withstand great pulling forces. Which of the tissue is described? A. Adipose. B.Cartilage. C.Bone. D. Dense connective tissue. E.Loose connective tissue 2. According to Frank-Starling law of the heart, A.increased preload causes increased cardiac output. B.increased afterload causes increased cardiac output. C.decreased preload causes increased afterload. D.afterload influences cardiac output more than preload. E.cardiac output is not influenced by preload.arrow_forwardWhich of the following is NOT a characteristic of the function of the vertebrate nerve cell/ nervous system? a) nerve cells keep the levels of Na + and k+ AT Equilibrium on both sides of the cell membrane at all times b) Nerve cells produce impulses that release neurotransmitters to stimulate other cells C) Nerve cells generate motor output (movement) d) nerve cells use neurotransmitters to regulate other cells e)nerve cells are speacialized in employing specific receptors to react to a specific stimulusarrow_forward
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