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PCAT Biology Excretion

Subjects : pcat, biology
  • Answer 50 questions in 15 minutes.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A hormone that causes an increased exchange transport of sodium and potassium ions along the distal convoluted tubule - the collecting tubule - and the collecting duct - resulting in a decreased excretion of sodium ions in the urine and an increased

2. As the filtrate flowing in the collecting tubules passes through this region of the kidney - on its way to the pelvis and ureter - water flows out of the collecting tubules by osmosis

3. Excrete water and dissolved salts

4. An organelle specialized for water excretion by active transport

5. Clean the blood plasma of unwanted substances as it passes throught he kidney

6. Pores in leaves

7. Remains relatively constant at 7.4

8. Accumulates mineral salts and uric acid in arthropods then transported to the intestine to be expelled with the solid wastes of digestion

9. Urine collects until it is expelled via the urethra

10. Processes nitrogenous wastes - blood pigment wastes - and other chemicals for excretion

11. The removal of indigestible material

12. Hypertonic to the blood

13. In the liver - leads to the production of nitrogenous wastes such as urea and ammonia

14. Anatomic arrangement of permits the reabsorption of ((% of the filtrate in the collecting tubules -makes the production of concentrated urine possible

15. Carbon dioxide and water vapor diffuse from the blood and are continually exhaled

16. Capillary bed embraced by Bowman's capsule

17. Consists the Bowman's capsule - which embraces the glomerulus

18. Nephron secretes substances such as acids - bases - and ions like potassium and phosphate from the interstitial fluid into the filtrate by both passive and active transport

19. Passive process where Blood pressure forces 20% of the blood plasma entering the glomerulus through the capillary walls and into the surrounding Bowman's capsule

20. Two pairs of nephridia in each body segment excret water - mineral salts - and nitrogenous wastes in the form of urea

21. Regulate the concentration of salt and water in the blood through the formation and excretion of urine

22. Pores in stems

23. Function to maintain the osmolarity of the blood -excrete numerous waste products and toxic chemicals -conserve glucose - salt - and water

24. Openings of tracheae

25. Serves to regulate body temperature - since the evaporation of sweat produces cooling

26. Tubelike things which are continuous with the external air

27. Proximal convoluted tubule - the loop of Henle - the distal convoluted tubule - and the collecting duct

28. Produced by the deamination of amino acids in the liver and diffuses into the blood for ultimate excretion in the kidneys

29. Surrounds nephron to facilitate reabsorption of amino acids - glucose - salts - and water

30. Filtration - secretion - and reabsorption are the three process

31. Bulb of nephro -leads into a long - coiled tubule tht is divided into functionally distinct units

32. Affect the blood acidity by causing changes in the PCO2

33. Nitrogenous wastes of arthropods

34. Divded into three regions: outer cortex - inner medulla - renal pelvis

35. Carbon dioxide is released from the tissues into adjacent tracheae through spiracles

36. Lungs - liver - skin - and kidneys

37. Counter-current system causes the medium in the medulla of the kidney to be hyperosmolar with respect to the dilute filtrate flowing in the collecting tubule

38. Concentrated urine in the collecting tubules flows into the pelvis of the kidney - a funnel-like region that opens directly into this

39. The removal of metabolic wastes produced in the body

40. Through the selective permeability of its walls and the maintenance of an osmolarity gradient - the nephron reabsorbs nutrienets - salts - and water from the filtrate and returns them to the body - thus maintaining the bloodstream's solute concentrat

41. Water is removed by capillaries flowing in the medulla

42. Leads to the production of carbon dioxide and water

43. Essential substances and water are reabsorbed from the filtrate and returned to the blood -occurs primarily in the proximal convuluted tubule and is an active process

44. The reabsorption of water in this zone of the kidney - which permits the concentration of urine - dpeends on the permeability of the collecting tubules to water

45. Created when exiting and reentering at different segments of the nephron - with tissue osmolarity increasing from cortex to inner medulla

46. Regulation of the permeability of the collecting tubule to water is accomplished by the hormone ADH (vasopressin)

47. The fluid and small solutes entering the nephron -isotonic with blood plasm

48. Increases the permeability of the collecting duct to water - allowing more water to be absorbed and more concentrated urine to be formed

49. Exit of water vapor through leaf stomates

50. Water-solube wstes - such as ammonia and carbon dioxide - can exit the cells by simple diffusion through the cell membrane