Anatomy of the Cockroach Practice Questions
19 free Anatomy of the Cockroach practice questions for the NCERT Biology. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Which part of the digestive system in cockroach is responsible for grinding food?
- A Gizzard
- B Crop
- C Midgut
- D Hindgut
Correct answer: Gizzard
The gizzard (proventriculus) has chitinous teeth that grind the food. It ensures mechanical digestion before passing food to the midgut.
Where does the initial digestion of food begin in cockroach?
- A Salivary glands
- B Buccal cavity
- C Gizzard
- D Midgut
Correct answer: Buccal cavity
Digestion begins in the buccal cavity with the help of salivary enzymes. These enzymes start breaking down food.
Which part of the digestive system stores food temporarily in cockroach?
- A Midgut
- B Crop
- C Gizzard
- D Anus
Correct answer: Crop
The crop is a thin-walled sac that stores food. It allows gradual processing of ingested material.
Which region of the alimentary canal is involved in absorption of digested food?
- A Foregut
- B Midgut
- C Hindgut
- D Mouth
Correct answer: Midgut
The midgut is responsible for enzymatic digestion and absorption. It is lined with glandular cells.
Which structures are present in the midgut to increase surface area for absorption?
- A Tracheae
- B Malpighian tubules
- C Hepatic caeca
- D Cerci
Correct answer: Hepatic caeca
Hepatic caeca are finger-like projections that increase surface area. They aid in digestion and absorption.
Which excretory organs are associated with the digestive system in cockroach?
- A Nephridial tubules
- B Malpighian tubules
- C Kidneys
- D Flame cells
Correct answer: Malpighian tubules
Malpighian tubules remove nitrogenous wastes from hemolymph. They open into the hindgut.
What type of circulatory system is present in cockroach?
- A Closed circulatory system
- B Open circulatory system
- C Double circulation
- D Single circulation
Correct answer: Open circulatory system
Cockroach has an open circulatory system. Hemolymph flows freely in body cavities.
The blood in cockroach is called:
- A Blood plasma
- B Hemolymph
- C Serum
- D Lymph
Correct answer: Hemolymph
The circulatory fluid in cockroach is called hemolymph. It transports nutrients but not oxygen.
How many chambers are present in the heart of cockroach?
- A 5
- B 10
- C 13
- D 20
Correct answer: 13
The heart of cockroach has 13 chambers. It lies dorsally and pumps hemolymph forward.
Which openings allow hemolymph to enter the heart?
- A Spiracles
- B Pores
- C Valves
- D Ostia
Correct answer: Ostia
Ostia are small openings in the heart. They allow hemolymph to enter from the body cavity.
Which system is responsible for respiration in cockroach?
- A Circulatory system
- B Digestive system
- C Tracheal system
- D Nervous system
Correct answer: Tracheal system
Cockroaches respire through a tracheal system. Air enters through spiracles and reaches tissues directly.
What are spiracles in cockroach?
- A Digestive glands
- B Excretory organs
- C Sensory receptor organs
- D Respiratory openings
Correct answer: Respiratory openings
Spiracles are small openings on the body surface. They allow air to enter and exit the tracheal system.
How many pairs of spiracles are present in cockroach?
- A 5 pairs
- B 8 pairs
- C 10 pairs
- D 12 pairs
Correct answer: 10 pairs
Cockroach has 10 pairs of spiracles. These are distributed along the thorax and abdomen.
Which tubes carry air directly to tissues in cockroach?
- A Blood vessels
- B Nephridia
- C Malpighian tubules
- D Tracheal tubes
Correct answer: Tracheal tubes
Tracheae are air-filled tubes that deliver oxygen directly to tissues. They branch into finer tracheoles.
Which part of the digestive system leads to the rectum in cockroach?
- A Foregut
- B Midgut
- C Hindgut
- D Buccal cavity
Correct answer: Hindgut
The hindgut includes the ileum, colon, and rectum. It is involved in water absorption and feces formation.
Which function is NOT performed by the circulatory system of cockroach?
- A Transport of oxygen
- B Transport of nutrients
- C Transport of hormones
- D Removal of wastes
Correct answer: Transport of oxygen
The circulatory system does not transport oxygen in cockroach. Oxygen is delivered directly via tracheae.
Which part of the digestive system connects the crop to the midgut?
- A Gizzard
- B Rectum
- C Oesophagus
- D Ileum
Correct answer: Gizzard
The gizzard lies between the crop and midgut. It grinds food before digestion continues.
Which part of the tracheal system is responsible for gas exchange at the cellular level?
- A Spiracles
- B Tracheae
- C Tracheoles
- D Alveolar sacs
Correct answer: Tracheoles
Tracheoles are fine branches of tracheae. They reach individual cells for gas exchange.
Which digestive organ secretes enzymes in cockroach?
- A Midgut
- B Crop
- C Gizzard
- D Rectum
Correct answer: Midgut
The midgut secretes digestive enzymes. It is the main site of digestion and absorption.