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4

Which of the following statement is/are correct regarding digestive system of cockroach ?
  1. Mouth opens into a short tubular pharynx, leading to a narrow tubular passage called oesophagus.
  2. Gizzard helps in grinding the food particles.
  3. A ring of 6-8 blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut, which secrete digestive juice.
  4. At the junction of midgut and hindgut is present another ring of 100-150 yellow coloured thin filamentous malphigian tubules which help in removal of excretory products from haemolymph.

A. Only (i)

B. Both (ii) and (iii)

C. Both (i) and (iv)

D. All of these

Correct Answer :

D. All of these


Digestive system of cockroach is divided into - foregut, midgut and hindgut. The mouth opens into a short tubular pharynx which further opens into a narrow tubular structure called oesophagus. The oesophagus opens into a sac-like structure called crop where food is stored. The crop is followed by gizzard and proventriculus. The gizzard helps in grinding the food particles. The entire foregut is lined by cuticle. At the junction of foregut and midgut, a ring of 6 - 8 blind tubules are present. These are called gastric or hepatic cecae which secrete digestive juice. The hindgut is broader than the midgut. The hindgut is differentiated into ileum, colon and rectum. The rectum opens through anus. Malpighian tubules are the excretory organs which absorb nitrogenous wastes and convert them into uric acid. Uric acid is excreted out through the hindgut.

Related Questions

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4

Read the following statements and answer the question.
  1. They have a hard and non-pliable ground substance rich in calcium salts and collagen fibres.
  2. They support and protect softer tissues and organs.
  3. Osteocytes are present in the spaces called lacunae.
  4. They also interact with skeletal muscles attached to them to bring about movements.

Which of the following type of tissue is being described by above statements ?

A. Cartilage

B. Bone

C. Blood

D. Neurons

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4

In cockroach, the testes are present in

A. 3, 4, 5 abdominal segments

B. 4, 5, 6 abdominal segments

C. 5, 6, 7 abdominal segments

D. 6, 7, 8 abdominal segments

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4

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following.
Which of the cells are least likely to be replaced by new cells?

A. Liver cells

B. Neurons

C. Malpighian layer of the skin

D. Osteocytes

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4

The supportive skeletal structures in the human external ears and in the nose tip are examples of

A. ligament

B. areolar tissue

C. bone

D. cartilage

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4

The ciliated columnar epithelial cells in humans occur in

A. Eustachian tube and stomach lining

B. bronchioles and fallopian tubes

C. bile duct and oesophagus

D. fallopian tubes and urethra

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4

Neuroglia are

A. excitable cells of neural tissue.

B. supporting and non-excitable cells of neural tissue.

C. two to three times in volume of neural tissue.

D. protective and excitable cells of neural tissue.

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4

Mast cells are associated with

A. exocrine glands

B. endocrine glands

C. areolar connective tissue

D. neural tissue

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4

Identify the figure with its correct function Fig :. Adipose connective tissue

A. Areolar connective tissue Serves as a support framework for epithelium.

B. Adipose tissue Store fats and act as heat insulators.

C. Dense regular tissue Provide flexibility.

D. Dense irregular tissue Provide strength and elasticity.

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4

Compound squamous epithelium is found in

A. stomach

B. intestine

C. trachea

D. pharynx

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4

The only type of cell seen in a tendon is

A. muscle fibres

B. reticular cells

C. collagenous cells

D. fibroblasts

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4

Which of the following types of connective tissue is mismatched with its matrix ?

A. Areolar Loosely packed matrix of protein fibres

B. Bone Mineralized matrix

C. Cartilage Highly vascular matrix

D. Blood Liquid matrix

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4

Lack of blood supply and presence of the noncellular basement membrane are the characteristics of the

A. muscular tissue

B. fluid connective tissue

C. epithelial tissue

D. nervous tissue

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4

Which statement regarding anal cerci and anal style in cockroach is correct?

A. Anal cerci are absent but anal styles are present in male.

B. Anal cerci are absent and anal styles are present in female.

C. Anal styles are absent and anal cerci are present in male.

D. Anal styles are absent and anal cerci are present in female.

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4

A student was given a specimen to identify on the basis of the characteristics given below.
  1. They are metamerically segmented.
  2. Presence of closed circulatory system.
  3. They have circular and longitudinal muscles for locomotion.

Identify the specimen.

A. Frog

B. Pheretima

C. Cockroach

D. Rabbit

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4

In the given diagram of areolar connective tissue, the different cells and parts have been marked by alphabets (A, B, C & D). Choose the answer in which these alphabets correctly match with the parts and cells they indicate.

A. A-Adipocyte, B-Collagen fibres, C-Microfilament, D-Mast cells

B. A-Macrophage, B-Collagen fibres, C-Microfilament, D-Mast cells

C. A-Macrophage, B-Collagen fibres, C-Microtubule, D-RBC

D. A-Macrophage, B-Fibroblast, C-Collagen fibres, D-Mast cells

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4

What are the three basic components of connective tissues?

A. Ground substance, cells and basement membrane

B. Cartilage, intercellular matrix and serum

C. Cells, protein fibers and ground substance

D. Collagen, elastin and reticular fibers

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4

A student was given a sample of tissue. He observes and concludes the following characters.
  1. The cells are composed of a single layer of tall and slender cells.
  2. Their nuclei are located at the base.
  3. Free surface may have microvilli.
  4. It is found in the lining of stomach and intestine
  5. They help in secretion and absorption.

Based on the above features identify the epithelium.

A. Cuboidal epithelium

B. Columnar Epithelium

C. Squamous epithelium

D. Glandular epithelium

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4

Read the following statements and answer the question.
  1. It is made of a single thin layer of flattened cells with irregular boundaries.
  2. They are found in the walls of blood vessels and air sacs of lungs.
  3. They are involved in functions like forming a diffusion boundary.

Which of the following characteristics of tissue is being described by the above statements ?

A. Squamous epithelium

B. Columnar epithelium

C. Ciliated epithelium

D. Compound epithelium

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4

Consider the following statements regarding cockroach and mark the correct option.
  1. Head is formed by the fusion of 6-segments.
  2. Mouth parts are biting and chewing type.
  3. Crop is the part of mid gut.

A. Only (ii) is correct

B. (ii) and (iii) are correct

C. (i) and (ii) are correct

D. Only (iii) is correct

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4

In which one of the following preparations, cell junctions come across most frequently ?

A. Ligament

B. Tendon

C. Cartilage

D. Ciliated epithelium

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4

Which of the follwing statement(s) is/are correct ?
  1. Cockroaches are brown or black bodied animals that are included in class insecta of phylum arthropoda.
  2. Males bear a pair of short, thread like anal styles which are absent in females.
  3. Heart of cockroach consists of elongated muscular tube lying along mid dorsal line of thorax and abdomen.
  4. The nymph grows by moulting about 13 times to reach the adult form.

A. Only (i)

B. Both (ii) and (iii)

C. Both (i) and (ii)

D. All of the above

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4

Which of the following type of muscle tissue is being described on the basis of given statements ?
  1. These muscle fibres taper at both ends and do not show striations.
  2. The wall of internal organs such as the blood vessels, stomach and intestine contain this type of muscle tissue.
  3. They are involuntary as their function cannot be directly controlled.

A. Skeletal muscle

B. Smooth muscle

C. Cardiac muscle

D. All of these

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4

Select the correct statement regarding Periplaneta americana

A. There are 16 very long malpighian tubules present at the junctions of midgut and hindgut.

B. Grinding of food is carried out only by the mouth parts.

C. Nervous system is located ventrally and consists of segmentally arranged ganglia joined by a pair of longitudinal connectives.

D. Females bear a pair of short thread like anal styles.

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4

Statement 1 : Cartilage (protein matrix) and bone (calcium matrix) are rigid connective tissue.
Statement 2 : Blood is connective tissue in which plasma is the matrix.

A. Statement- 1 and statement-2 are true and statement-2 is a correct explanation for statement -1

B. Statement -1 and statement-2 are true and statement-2 is not a correct explanation for statement -1

C. Statement - 1 is true and statement- 2 is false

D. Both the statements are false.

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4

The given figure shows open circulatory system of cockroach with structure marked as A, B and C. Which structure is a 13 pair of wing shaped involuntary muscles and mantain blood circulation?

A. A

B. B

C. C

D. Both A nad B

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4

Which of the following statement(s) regarding cell junctions is/are correct ?

A. Tight junctions help to stop substances from leaking across a tissue.

B. Adhering junctions perform cementing to keep neighbouring cells together.

C. Gap junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.

D. All of the above

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4

Which of the following type of cell junction is not found in animal tissues ?

A. Adhering junction

B. Tight junction

C. Gap junction

D. Plasmodesmata

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4

Which of the following statements is not correct regarding neural tissue ?

A. It exerts the greatest control over the bodys responsiveness to changing conditions.

B. Chondrocytes, the unit of neural system are excitable cells.

C. Neuroglial cells protect and support neurons.

D. When a neuron is suitably stimulated, an electrical disturbance is generated.

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4

The blood of cockroach contains no respiratory pigment. It means that

A. cockroach does not respire.

B. respiration is anaerobic.

C. oxygen goes directly into tissues by diffusion.

D. oxygen goes directly into tissues by intracellular capillary system.

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4

Epithelial tissue is distinguished from connective tissue, muscular, or nervous tissue by its

A. large extracellular matrix.

B. contractibility.

C. ability to carry action potentials.

D. basement membrane.