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Which of the following statements is true with regard to the act of voiding urine from the bladder? The micturition center is found in the medulla oblongata, making urination an involuntary process. The urge to urinate and the reflex arc are not stimulated until well over 1 liter of urine is present in the urinary bladder. The micturition center is found in the pons, making urination an involuntary process. O Micturition is activated by a reflex arc that involves stretch receptors in the wall of the urinary bladder and the parasympathetic nervous system.
Which of the following statements is true with regard to the reabsorption of substances, such as water, from the filtrate back into the blood plasma? The transcellular route transports substances through the tubule cells from the apical to the basolateral membrane, and then into the interstitial fluid. Substances reabsorbed via the transcellular route travel between adjacent cells instead of through them on the way into the interstitial fluid. The paracellular route transports substances through the tubule cells from the basolateral to the apical membrane, and then into the interstitial fluid. The paracellular route transports substances through the tubule cells from the apical to the basolateral membrane, and then into the interstitial fluid.