Urea A) is filtered and reabsorbed totally. B) is found in the filtrate and is r

Question

Urea A) is filtered and reabsorbed totally. B) is found in the filtrate and is reabsorbed, but is still found in the urine. C) is filtered, but not reabsorbed. D) never leaves the blood plasma. Glucose A) is found in the filtrate and is reabsorbed, but still occurs in the urine B) is filtered, but not reabsorbed. C) never leaves the blood plasma. D) is filtered and completely reabsorbed. What substance found in the renal medulla helps increase the amount of water drawn out of the tubule to be picked up by the blood? A_ Chloride ions B) Urea C) Amino acids D) Glucose The increasing concentration of salt and urea in the renal medulla that continues to draw water out of the descending limb is called A) countermeasure mechanism B) secretion. ADH causes more water to be reabsorbed into the blood to give a lower urine volume. What stimulus causes the hypothalamus to produce ADH? A) Decreased blood B) Increase blood apply. C) Increased blood D) None apply One of the effects of increases secretion is to ____ blood pressure. A) decrease B) increase What mechanical process moves the bolus through the esophagus? A) Segmentation B) Mass movement C) Peristalsis D) Swallowing Carbohydrates are first chemically digested in the A) duodenum. B) large intestine C) mouth D) stomach

Explanation / Answer

18. C. is filteres, but not reabsorbed (though it is toxic)

19. D. is filtered and completely reabsorbed (useful substance for body)

20.A Chloride ions (makes solution hypertonic)

21. Countercurrent mechanism (increase osmolarity)

22.T

23. A. Increased osmolarity (to keep water)

24.B increase in blood pressure(because ADH acts on DCT to reabsorb Na+ , which result inmore water reabsorption, so less water in blood capillaries)

25.C. Peristalsis

26. C. Mouth (ptyalin)

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