PHERETIMA EXCRETORY AND NERVOUS SYSTEM -PRACTICE BITS

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1. (A) : Septal nephridia in Pheretima eliminates nitrogenous wastes from blood as well as coelomic fluid
 (R) : They are enteronephric
 1) Both A & R are true and R explains A
 2) Both A & R are true & R does not explains A
 3) A is true, R is false   4) A is false, R is true
2. (A) : Septal nephridia in Pheretima collect the eleocytes ingested by the amoebocytes to the exterior
 (R) : They are open type
 1) Both A & R are true and R explains A
 2) Both A & R are true & R does not explains A
 3) A is true, R is false   4) A is false, R is true
3. (A) : Seminal vesicles of earthworm are called septal pouches
 (R) : These are formed from septa
 1) Both A & R are true and R explains A
 2) Both A & R are true & R does not explains A
 3) A is true, R is false   4) A is false, R is true
4. (A) : Only one earthworm hatches out from a cocoon
 (R) : In cocoon only one egg is present
 1) Both A & R are true and R explains A
 2) Both A & R are true & R does not explains A
 3) A is true, R is false   4) A is false, R is true
4. (A) : Blood in dorsointestinal blood vessels contains more nutrients in Pheretima
 (R) : In the intestinal region of Pheretima each segment contains two pairs of dorsontestinal blood vessels
 1) Both A & R are true and R explains A
 2) Both A & R are true & R does not explains A
 3) A is true, R is false   4) A is false, R is true
5. (A) : Earthworms are described as ureotelic animals
 (R) : Urea is the major excretory product in earthworms
 1) Both A & R are true and R explains A
 2) Both A & R are true & R does not explains A
 3) A is true, R is false   4) A is false, R is true
6. (A): In Pheretima, coelomic fluid cannot be exchanged between 10th and 11th segments
 (R): 10th and 11th segments in Pheretima are separated by non perforated septum
 1) Both A & R are true and R explains A
 2) Both A & R are true & R does not explains A
 3) A is true, R is false   4) A is false, R is true
7. Following are the statements about nephridia  in Pheretima
 1. Micro nephridia are attached to the inner surface of body wall
 2. The straight lobe of the septal nephridium is continued into the distal limb of the twisted loop
 3. Pharyngeal nephridia are as large as the septal nephridia but like the integumentaries they are exonephric
 Which of the above are correct
 1.All are true 2. Only 1&2 are true
 3. Only 1&3 are true 4. Only 2&3 are true
8. Glands of Pheretima helpful for the formation of spermatophores are
 1. Accessory glands 2. Prostrate glands
 3. Lymph glands 4. Blood glands
9. Ganglia present on the dorsal side of alimentary canal in Pheretima are
 1. Supra oesophageal ganglia
 2. Sub pharyngeal ganglia
 3. Supra pharyngeal ganglia
 4. Segmental ganglia
10. In Pheretima, number of ganglia present in the nerve ring
 1. 4 2.2 3. 12 4. 8
11. Receptors of earthworm sensitive to ground vibrations are
 1. Epidermal receptors
 2. Photo receptors 3. Buccal receptors
 4. Chemo receptors
12. In Pheretima, nerve ring is formed around
 1. Pharynx 2. Oesophagus
 3. Gizzard  4. Buccal chamber
13. Double ventral nerve cord in Pheretima starts from
 1. 3rd segment 2. 4th segment
 3. 5th segment 4. 2nd segment
14. Distinguishing feature of the buccal receptor cells in Pheretima is
 1. Presence of ‘L’ shaped lens
 2. Connected ti nerve fibre
 3. Presence of nuclei in deeper part
 4. Consisting of a hyaline substance
15. Number of nerves arise from cerebral ganglia in Pheretima is
 1. 2 pairs  2. 2
 3. 8 to 10  4. 8 to 10 pairs
16. In Pheretima, double ventral nerve cord is absent in the segments
 1. 4th to last 2. 1st,2nd  and 4th
 3. 1st,2nd and 3rd  4. 3rd and 4th
17. Lens of photoreceptor in Pheretima is
 1. Phaeosome 2. Episome
 3. Mesosome 4. Endosome
18. Double ventral nerve cord in Pheretima arises from
 1. Supra oesophageal ganglia
 2. Sub pharyngeal ganglia
 3. Supra pharyngeal ganglia
 4. Sub oesophageal ganglia
19. Cerebral ganglia in Pheretima are present in the segment
 1. 2nd 2. 3rd 3. 4th 4. 5th
20. Prostomium of Pheretima receives nerves from
 1. Supra oesophageal ganglia
 2. Sub pharyngeal ganglia
 3. Supra pharyngeal ganglia
 4. Sub oesophageal ganglia
21. In Pheretim, segment with nerve ring as well as double ventral nerve cord is
 1. 4th segment 2. 3rd segment
 3. 5th segment 4. 2nd segment
22. In Pheretima epidermal receptors are abundant on
 1. Dorsal and ventral sides
 2. Lateral and dorsal sides
 3. Antero dorsal sides
 4. Ventro lateral sides
23. Afferent fibres of peripheral nerves in Pheretima connects
 1. Receptor to effector organs
 2. Ventral nerve cord to effector organs
 3. Receptor to ventral nerve cord
 4. Ventral nerve cord to receptor
24. Receptors with single cell in Pheretima are
 1. Photoreceptros
 2. Epidermal receptors
 3. Buccal receptors 4. Mechano receptors
25. Number of segmental ganglia in the pre-clitellar region of Pheretima is
 1. 10 pairs 2. 9 pairs
 3. 13 pairs 4. 12 pairs
26. Epidermal receptors in Pheretima acts as
 1. Chemoreceptors 2. Auditory receptors
 3. Gustatory receptors
 4. Olfactory receptors
27. Number of segments in Pheretima with only one type of nephridia is
 1. 8 2. 14 3. 9 4. 15
28. Part of septal nephridium that joins with the septal excretory canal is
 1. Proximal limb of the twisted loop
 2. Short straight lobe
 3. Distal limb of the twisted loop
 4. Terminal nephridial duct
29. V-shaped nephridia in Pheretima  are
 1. Pharyngeal nephridia
 2. Typical nephridia 3. Septal nephridia
 4. Integumentary nephridia
30. Position of supra- intestinal excretory canals in Pheretima is
 1. Above the dorsal blood vessel
 2. Below the intestine 3. Above the intestine 4. Below the ventral blood vessel
31. Pharyngeal nephridia in Pheretima lie on either side of
 1. Buccal chamber and pharynx
 2. Pharynx and oesophagus
 3. Oesophagus and gizzard
 4. Pharynx and gizzard
32. Closed nephridia in Pheretima are
 1. Pharyngeal and integumentary nephridia
 2. Pharyngeal and septal nephridia
 3. Septal and integumentary nephridia
 4. Integumentary and typical nephridia
33. In Pheretima, nephridia absent in segments with blood glands are
 1. Pharyngeal nephridia
 2. Integumentary nephridia
 3. Septal nephridia 4. All
34. Number of septa in Pheretima that do not bear septal nephridia is
 1. 9 2. 10 3. 11 4. 14
35. In Pheretima, nephridia are absent in
 1. First 3 segments 2. Clitellar segments
 3. First 2 segments
 4. Post-clitellar segments
36. Closed and exonephric nephridia are
 1. Pharyngeal nephridia
 2. Typical nephridia
 3. Septal nephridia
 4. Integumentary nephridia
37. In Pheretima, pair of ducts from the pharyngeal nephridia of the sixth segment open into
 1. Pharynx  2. Buccal chamber
 3. Oesophagus 4. Gizzard
38. In Pheretima, nephridia eliminate excretory wastes both from the blood and the coelomic fluid are
 1. Pharyngeal nephridia
 2. Typical nephridia
 3. Septal nephridia
 4. Integumentary nephridia
39. Enteronephric nephridial system of Pheretima is an adaptation for
 1. Conservation of urea
 2. Conservation of water
 3. Elimination of water
 4. Elimination of faeces
40. Enteronephric nephridia in Pheretima are
 1. Pharyngeal and integumentary nephridia
 2. Pharyngeal and septal nephridia
 3. Septal and integumentary nephridia
 4. Integumentary and typical nephridia
41. Based on excretory product Pheretima is described as
 1. Hypotonicand uricotelic
 2. Hypertonic and uricotelic
 3. Hypertonic and uriotelic
 4. Hypotonic and uriotelic
42. Forest of nephridia in Pheretima is
 1. Typhlosolar region 2. Clitellar region
 3. Pre-clitellar region 4. Post-clitellar region
43. Chlorogogen cells are derived from
 1. Outer coelomic epithelium
 2. Epidermis
 3. Inner coelomic epithelium
 4. Endodermis
44. Pharyngeal nephridia in Pheretima opens into
 1. Buccal chamber and pharynx
 2. Pharynx and oesophagus
 3. Oesophagus and gizzard
 4. Pharynx and gizzard
45. Tufted nephridia in Pheretima are
 1. Pharyngeal nephridia
 2. Typical nephridia
 3. Septal nephridia
 4. Integumentary nephridia
46. Terminal nephridial duct of sepal nephridia is the continuation of
 1. Proximal limb of the twisted loop
 2. Nephrostome
 3. Distal limb of the twisted loop
 4.Neck
47. Total number of pharyngeal nephridia in Pheretima is
 1. 3 pairs  2. 200 to 250
 3. 80 to 100 4. Many
48. Septal excretory canals in Pheretima directly opens
 1. Into intestine 2. To out side
 3. Into supra intestinal excretory canal
 4. Into coelom
49. Number of septal excretory canals in each segment is
 1. Many 2. 2 pairs 3. 2 4. 1
50. In Pheretima, the nitrogenous wastes from the blood supplied to the intestinal wall are collectd by
 1. Septal nephridia 2. Chlorogogen cells
 3. Pharyngeal nephridia
 4. Eleocytes
51. In Pheretima, first septum to which septal nephridia are attached lies between the segments
 1. 4/5 2. 14/15 3. 15/16 4. 5/6
52. Number of pre clitellar segments in Pheretima with micro nephridia and without pharyngeal nephridia
 1. 8 2.10 3. 11 4. 13
53. Open and enteronephric nephridia
 1. Pharyngeal nephridia
 2. Typical nephridia 3. Septal nephridia
 4. Integumentary nephridia
54. Detached chlorogogen cells loaded with excretory wastes are called
 1. Phagocytes 2. Mucocytes
 3. Eleocytes 4. Amoebocytes
55. Nephridia absent in Pheretima are
 1. Pharyngeal nephridia
 2. Typical nephridia 3. Septal nephridia
 4. Integumentary nephridia
56. Closed and enteronephric nephridia in Pheretima are
 1. Pharyngeal nephridia
 2. Typical nephridia 3. Septal nephridia
 4. Integumentary nephridia
57. In Phertima phagocytised eleocytes are sent out through
 1. Pharyngeal nephridia
 2. Typical nephridia 3. Septal nephridia
 4. Integumentary nephridia
58. In Pheretima pharyngeal nephridia present on either side of oesophagus but opens into pharynx are present in the segment   

 1. 4 2. 5 3. 6 4. 7

59. In Pheretima pharyngeal nephridia present on either side of oesophagus but opens into pharynx are present in the segment   

 1. 4 2. 5 3. 6 4. 7
60. Number of common nephridial ducts that open into pharynx of Pheretima is
 1. 1 pair 2 .4 pairs 3. 3 pairs 4. 2 pairs
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