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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. Affect the blood acidity by causing changes in the HCO3-

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

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

4. 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

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

6. Water is removed by capillaries flowing in the medulla

7. Capillary bed embraced by Bowman's capsule

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

9. 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

10. 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

11. Excrete water and dissolved salts

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

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

14. Remains relatively constant at 7.4

15. No specific excretory system in plants -any excess CO2 - O2 - and H2O vapor - leaves the lant by diffusion through stomata and lenticels

16. 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

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

18. Tubelike things which are continuous with the external air

19. Nitrogenous wastes of arthropods

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

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

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

23. Exit of water vapor through leaf stomates

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

25. Openings of tracheae

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

27. The removal of metabolic wastes produced in the body

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

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

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

31. 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

32. An organelle specialized for water excretion by active transport

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

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

35. The removal of indigestible material

36. Leads to the production of carbon dioxide and water

37. 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

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

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

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

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

42. 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

43. Urine collects until it is expelled via the urethra

44. Hypertonic to the blood

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

46. Pores in stems

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

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

49. Pores in leaves

50. Lungs - liver - skin - and kidneys