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- Question 41 The sliding filament model of contraction involves----- A) Actin and myosin sliding past each other and partially overlapping B) The Z discs sliding over the myofilaments C) Actin in myosin lengthening in order to slide past each other D) The shortening of thick filaments so that the thin filaments slide past Please provide a brief explaination of each one correct or incorrect. THANK YOU!!Question 3 During muscle contraction, the agonist while the antagonist 1. Shortens; lengthens 2. Remains unchanged; lengthens 3. Shortens; remains unchanged 4 lengthens; shortensQUESTION 9 How is smooth muscle contraction regulated differently from striated skeletal muscle contraction? A. Smooth muscle has organized parallel arrays of myofilaments. B. Smooth muscle cells contract only through voluntary control. C. Smooth muscle does not have myosin filaments. D. Smooth muscle does not respond to elevations in intracellular Ca2+ levels. E. Smooth muscle does not have troponin.
- Question 14 It is important for newly developed neurons to form synapses with other neurons. which cells are most responsible for guiding the formation of these particular junctions? A) Schwann cells B) Microglial cells C) Satellite cell D) Astrocytes Please provide brief explanation why answers correct or incorrectQUESTION 21 You are in charge of generating a scaffold for use in tissue engineering applications that behaves similarly to the natural ECM proteins. What proteins might you want to include in your scaffold? A Fibronectin only B Collagen, fibronectin, and proteoglycans C Proteoglycans only D None of the above are proteins in the ECM E Collagens onlyQuestion 7 Between threshold and maximal stimuli, I observed: 1. that the force of contraction was most influenced by the placement of the electrode 2. that the force of contraction was unrelated to the magnitude of the stimulus 3. that the force of contraction decreased as the magnitude of the stimulus increased 4. that the force of contraction increased as the magnitude of the stimulus increased
- Question 14 View the image below and circle the image which shows the sarcomere that can provide optimal muscle tension and whyQUESTION 17 Lungs: With age, lung function becomes "less efficient." Which one does not explain why? Lung tissue becomes more "elastic" resulting in less expansion. There is a decrease in "reserve capacity" that affects stamina. There is a decrease in the number of airs sacs for oxygen transport. Muscles in the rib cage become weaker and reduce contraction.Question 70SavedIn addition to helping regulate neurotransmitter levels, what other benefits are observed with antidepressant medications? Question 70 options: A reduction in inflammation and chronic pain An increase in cerebral BDNF levels An increase in synaptic sprouting All of the above are benefits of antidepressants
- QUESTION 28 True or False? The "plaques and tangles" in brain tissue that define Alzheimer's disease, are made up of fat and cholesterol, as in cases of heart disease? True FalseQuestion 2 of 15 Many nutritional deficiency in B vitamins are associated with what symptoms? I. Neurologic II. Hematologic III. Cutaneous Select the correct response: I only Il only I, II, and III land II Il and IIIQuestion 37 Locard’s exchange principle states that, whenever two objects come into contact with one another, there is exchange of materials between them. a. True b. False