Mention the function of the following:
(a) Ureters in frog
(b) Malpighian tubules
(c) Body wall in earthworm.
(a) Ureters in frog: Ureter is a transparent duct which arise from outer portion of kidney. In the "male frogs, ureter acts as urinogenital duct which runs backwards from kidneys and opens into the cloaca. It carries both urine and spermatozoa from kidney to the cloaca. In female, ureter conducts only urine from kidneys to the cloaca.
(b) Malpighian tubules: Malpighian tubules are excretory organs present in cockroach. These are present at junction of mid gut and hindgut. These are fine, long, unbranched, yellowish and blind tubules and are 100-150 in number. They help in the removal of excretory products from haemolymph.
(c) Body wall in earthworm: It consists of cuticle, epidermis, muscular layer and parietal peritoneum.
(i) It maintains the characteristic shape of’ the body.
(ii) It protects the internal organs.
(iii) The cuticle prevents excessive evaporation.
(iv) It serves as an ideal respiratory organ.
(v) The receptor cells play a vital sensory function.
(vi) The albumen helps in the formation of cocoon. It also serves as a food for the developing earthworm inside the cocoon.
(vii) Setae and muscles are responsible for locomotion.
(viii) Excretory matter is passed out through nephridiopores.
The digestive system of a frog is made of the following parts. Arrange them in an order beginning from mouth.
Mouth, oesophagus, buccal cavity, stomach, intestine, cloaca, rectum, cloacal aperture
Complete the following statement:
a. In Cockroach grinding of food particle is performed by
b. Malpighian tubules help in removal of
c. Hind gut of Cockroach js differentiated into
d. In Cockroach blood vessels open into spaces called
State the number of segments in earthworm which are covered by a prominent dark band or clitellum.
Correct the wrong statements among the following.
a. In earthworm, a single male genital pore is present.
b. Setae help in locomotion of earthworm.
c. Muscular layer in the body wall of earthworm is made up of only circular muscles.
d. Typhlosole is the part of intestine of earthworm.
Match the followings and choose the correct answer.
A. | Touch | (i) | Nasal epithelium |
B. | Smell | (ii) | Foramen magnum |
C. | Cranial nerves | (iii) | Sensory papillae |
D. | Medulla oblongata | (iv) | Peripheral nervous system |
(a) A—(iii), B—(i), C—(ii), D—(iv)
(b) A—(ii), B—(i), C—(iv), D—(iii)
(c) A—(ii), B—(iv), C—(ii), D—(i)
(d) A—(iii), B—(i), C—(iv), D—(ii)
Match the following and choose the correct option.
A. | Adipose tissue – | (i) | Nose |
B. | Stratified epithelium | (ii) | Blood |
C. | Hyaline cartilage | (iii) | Skin |
D. | Fluid connective tissue | (iv) | Fat storage |
(a) A—(i), B—(ii), C—(iii), D—(iv)
(b) A—(iv), B—(iii), C—(i), D—(ii)
(c) A—(iii), B—(i), C—(iv), D—(ii)
(d) ‘ A—(ii), B—(i), C—(iv), D—(iii)
Why are neurons called excitable cells? Mention special features of the membrane of the neuron?
Write the functions in brief in column B, appropriate to the structures given in column A.
Column A | Column B | ||
a. | Nictitating membrane | i. | |
b. | Tympanum | ii. | |
c. | Copulatory pad | iii. |
Mention the function of the following:
(a) Ureters in frog
(b) Malpighian tubules
(c) Body wall in earthworm.
Common name of some animals are given in Column A, write their scientific name in Column B.
Column A | Column B | |
a. | Tiger | |
b. | Peacock | |
c. | Housefly |
Stratified epithelial cells have limited role in secretion. Justify their role in our skin.
Mark the odd one in each series.
(a) Areolar tissue; blood; neuron; tendon
(b) RBC; WBC; platelets; cartilage
(c) Exocrine; endocrine; salivary gland; ligament
(d) Maxilla; mandible; labrum; antennae
(e) Protonema; mesothorax; metathorax; coxa.
Write down the common features of the connective tissue. On the basis of structure and function, differentiate between bones and cartilages.
Match the following and choose the correct answer.
A. | Hermaphrodite | (0 | Produces blood cells and haemoglobin |
B. | Direct development | (ii) | Testis and ovary in the same animal |
G. | Chemoreceptor | (iii) | Larval form absent |
D. | Blood gland in earthworm | (iv) | Sense of chemical substances |
(a) A—(ii), B—(iii), C—(iv), D—(i)
(b) A—(iii), B—(ii), C—(iv), D—(i)
(c) A—(i), B—(iii), C—(ii), D—(iv)
(d) A—(ii), B—(iv), C—(iii), D—(i)
Special venous connection between liver and intestine, and between kidney and intestine is found in frog, what are they called?
Match the terms in column I with those in column II.
Column I |
Column II |
(a) Compound epithelium (b) Compound eye (c) Septal nephridia (d) Open circulatory system (e) Typhlosole (f) Osteocytes (g) Genitalia |
(i) Alimentry canal (ii) Cockroach (iii) Skin (iv) Mosaic vision (v) Earthworm (vi) Phallomere (vii) Bone |
What are the following and where do you find them in animal body?
(a) Chondrocytes
(b) Axons.
(c) Ciliated epithelium
Answer in one word or one line.
(i) Give the common name of Periplaneta americana.
(ii) How many spermathecae are found in earthworm?
(iii) What is the position of ovaries in cockroach?
(iv) How many segments are present in the abdomen of cockroach?
(v) Where do you find Malpighian tubules?
The body of sponges does not possess tissue level of organisation though it is made of thousands of cells. Comment.
Structural organisation in animals attains different levels as cell—organ— organ system. What is missing in this chain? Mention the significance of such an organisation.
Write the appropriate type of tissues in column B according to the functions mentioned in column A.
Column A | Column B | ||
a. | Secretion and absorption | i. | |
b. | Protective covering | ii. | |
c. | Linking and supporting framework | iii. |
Frog is a poikilotherm, exhibits camouflage and undergoes aestivation and hibernation, how are all these beneficial to it?
Why nephridia in earthworm that are basically similar in structure classified into three types? Mention the names of each.
Classify and describe epithelial tissue on the basis of structural modifications of cells.
Answer the following.
(i) What is the function of nephridia?
(ii) How many types of nephridia are found in earthworm based on their location?