CBSE Class 11 Biology HOTs Structural Organisation In Animals

Structural Organisation In Animals

Questions:

Q.1.Pawan bites by an ant on finger and after few minutes the finger swells up. How does it occur? Which cells are responsible for it?

Ans.1. Mast cell release heparin which swells the fingers.

Q.2. In stomach HCl is secreted by a gland. Explain the nature of gland.

Ans.2.HCl secreted by oxyntic cells. Oxyntic cells are unicellular and present mucosa of stomach.

Q.3. Cardiac muscle tissues have both character of skeletal and smooth muscles, how? Explain.

Ans.3. Cardiac muscle is a type of involuntary muscle found in heart. Cardiac muscle exhibits striations which is characteristics of striated muscles, while it does not work will of animal so it is involuntary characters.

Q.4.Expalin mouth parts of cockroach with diagram.

Ans.4. refer diagram given in ncert fig.7.15 page no.112 and explanation.

Q.5. Malphigian tubules are proto structure of nephron. How?

Ans.5.Malphigian tubules are present at the junction of midgut and hindgut of cockroach. They help in removal of excretory products from haemolymph. In higher animals it resembles to nephron.

Q.6.Differentiate between male and female cockroach.

Ans.6.

Important Questions for NCERT Class 11 Biology Structural Organisation in Animals

Ques. Which one of the following is correct pairing of a body part and the kind of muscle tissue that moves it?
(a) Biceps of upper arm – Smooth muscle fibres
(b) Abdominal wall – Smooth muscle
(c) Iris – Involuntary smooth muscle
(d) Heart wall – Involuntary unstriated muscle

Answer: B

Ques. The epithelial tissue present on the inner surface of bronchioles and Fallopian tubes is
(a) glandular      (b) ciliated
(c) squamous     (d) cuboidal. 

Answer: B

Ques. The cell junctions called tight, adhering and gap junctions are found in
(a) connective tissue    (b) epithelial tissue
(c) neural tissue           (d) muscular tissue.

Answer: B

Ques. The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in
(a) nails                  (b) ear ossicles
(c) tip of the nose    (d) vertebrae. 

Answer: C

Ques. Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?
(a) Vacuoles and fibres
(b) Flagellum and medullary sheath
(c) Nucleus and mitochondria
(d) Perikaryon and dendrites 

Answer: D

Ques. In which one of the following preparations are you likely to come across cell junctions most frequently?
(a) Thrombocytes        (b) Tendon
(c) Hyaline cartilage     (d) Ciliated epithelium

Answer: D

Ques. Areolar connective tissue joins
(a) bones with bones
(b) fat body with muscles
(c) integument with muscles
(d) bones with muscles. 

Answer: C

Ques. Mast cells secrete
(a) haemoglobin      (b) hippurin
(c) myoglobin          (d) histamine. 

Answer: D

Ques. Four healthy people in their twenties got involved in injuries resulting in damage and death of 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 

Answer: B

Ques. Mast cells of connective tissue contain
(a) vasopressin and relaxin
(b) heparin and histamine
(c) heparin and calcitonin
(d) serotonin and melanin. 

Answer: B

Ques. Which one of the following contains the largest quantity of extracellular material ?
(a) Striated muscle           (b) Areolar tissue
(c) Stratified epithelium    (d) Myelinated nerve fibres 

Answer: B

Ques. Collagen is
(a) fibrous protein      (b) globular protein
(c) lipid                     (d) carbohydrate. 

Answer: A

Ques. During an injury nasal septum gets damaged and for its recovery which cartilage is preferred?
(a) Elastic cartilage          (b) Hyaline cartilage
(c) Calcified cartilage       (d) Fibrous cartilage

Answer: B

Ques. Which cells do not form layer and remains structurally separate?
(a) Epithelial cells    (b) Muscle cells
(c) Nerve cells         (d) Gland cells 

Answer: C

Ques. Proteoglycan in cartilages which is a part of polysaccharide is
(a) chondroitin      (b) ossein
(c) casein             (d) cartilagin. 

Answer: A