In the initiation of muscle fiber contraction, calcium ions bind to tropomyosin, exposing active sites on actin for cross-bridge formation.
Answer the following statement true (T) or false (F)
False
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What is the name of the serous membrane in closest proximity to the lungs?
a) parietal pleura b) visceral pleura c) parietal pericardium d) visceral pericardium e) mediastinum
What are the characteristics that determine gender (consider genetic, anatomical, hormonal, and other factors)? Is it always the case that genetic, psychological, and physical gender cues indicate the same gender? Explain your answer, citing specific examples of conditions in which there is gender conflict.
What will be an ideal response?
Fill in the missing blood vessel.Innominate artery; ________; right external carotid artery
What will be an ideal response?
What condition(s) must exist for a solute to be passively reabsorbed from the renal tubules?
A) The solute must be able to permeate the membrane of the capillary endothelial cells, and the solute must be in greater concentration in the plasma than tubule fluid. B) The solute must be able to permeate the membrane of the tubule epithelial cells, and the solute must be in greater concentration in the plasma than tubule fluid. C) The solute must be able to permeate the membrane of the tubule epithelial cells and capillary endothelial cells. Its concentration is irrelevant. D) The solute must be able to permeate the membrane of the capillary endothelial cells, and the solute must be in greater concentration in the tubule fluid than plasma. E) The solute must be able to permeate the membrane of the tubule epithelial cells, and the solute must be in greater concentration in the tubule fluid than plasma.