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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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
Transcribed Image Text:How does inhibition of the Na+/K+ ATPase
increase the force of heart muscle
contraction?
O It decreases cytosolic K+ and therefore
decreases Ca2+ export
It increases cytosolic Na+ and therefore
decreases Ca2+ export
It increases cytosolic K+ and therefore
decreases Ca2+ export
It decreases cytosolic Na+ and therefore
decreases Ca2+ export
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- the MTOR kinase activity is stimulated by O all answers listed O cardiac mechanical stress O skeletal muscle stress O insulinarrow_forward2+ Activation of 5-HT2A Increases cytosolic free Ca²+ Concentration ([Ca²+]) Via a Signaling cascade. At rest, neurons have a cytosolic Ca Concentration of 100nM. The ex- Tra cellular free calcium concentration is typically 1.2m M. Calculate the resting potential (at equilibrium) produced by the neuron as a result of the calcium ion concentration gradient. (Report your answer in mV ).arrow_forward#1B-arrestin is always active. #2 Lack of kinase domain in BARK #3 ß1-adrenergic membrane receptor lacking it's ligand-binding domainarrow_forward
- Given the effect of myosin heavy chain phosphorylation on myosin II assembly/disassembly, why might it make sense to find this kinase near the contractile ring as the process of cell division is concluding?arrow_forwardwhy are we not sensitive to small decreases in PO2 but we are too PCO2?arrow_forwardThe fastest effect from stimulation of a G-protein-coupled receptor (GPCR) is from O CAMP G-alpha, O the shortcut pathway G-alpha G-alphasarrow_forward
- Smooth muscle excitation happens through activation of what pathway? A, G -protein through CAMP second messenger pathway B, G -protein through DAG second messenger pathway C, G protein through IP3 second messenger pathway D, Tyrosine -kinase pathway.arrow_forwardDescribe the two zipper proteins and how they interact when the cell is negative and relaxed and how they interact when the cell is positive, and contraction is occurring.arrow_forwardPOS Skeletal muscle cells differ from cardiac muscle cells in that O skeletal muscle cells are spindle shaped and possess one centrally located nucleus O skeletal muscle cells consist of cylindrical, non branched cells wilth multiple nuclei O skeletal muscle cells are branched and generally possess one nucleus O skeletal muscle cells possess cell junctions called intercalated disCS 33 34 35 36 37 38arrow_forward
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