FREE NEET Biology Practice MCQ Test: Structural Organisation In Animals Exercise 3 Questions Answers With Detailed Explanations [PDF]

Answer: (c)

Tendon is a firm in elastic fibrous cord which attaches muscle to bone. Ligament is a strong band of fibrous tissue which serves to bind bones to other parts. Adipose tissue is a kind of connective tissue present in sub dermal space.

Answer: (d)

Answer: (c)

Answer: (b)

Areolar connective tissue has rich supply of nerve fibres and blood vessels. It joins skin epithelia with muscles, nerves & blood vessels. Binding of body parts together is the main function of areolar connective tissue.

Answer: (d)

Compound epithelium covers the dry surface of the skin, the moist surface of buccal cavity, pharynx, inner lining of ducts of salivary glands and pancreatic ducts.

Answer: (a)

A - Crop; B - Gizzard; C - Hepatic caeca; D - Malpighian tubule Crop is a sac-like structure which store food. The crop is followed by gizzard and proventriculus. The gizzard has an outer layer of thick circular muscles and thick inner cuticle; forming six highly chitinous plate called teeth. Food particles are ground in the gizzard. At the junction of foregut and midgut, a ring of 6 - 8 blind tubules are present. These are called gastric or hepatic cecae and secrete digestive juice. Malpighian tubules are the excretory organs which absorb nitrogenous wastes and convert them into uric acid. Uric acid is excreted out through the hindgut.

Answer: (c)

Fibrinogen, prothrombin, throm- boplastin are respectively clotting factors I, II and III.

Thromboplastin released from injured platelets or injured tissue. This converts prothrombin into thrombin in the presence of calcium ions. The thrombin converts fibrinogen into fibrin and the latter forms the clot.

Answer: (c)

Answer: (d)

Label 3 and 4 are respectively genital chamber and vestibulum which is collectively called genital pouch.

Answer: (c)

Ligament occurs in the form of cords in a modified yellow elastic fibrous tissue and connects bone with a bone. Modified white fibrous tissue is present in the tendons.

Answer: (c)

Inner lining of salivary ducts - Simple cuboidal epithelium

Moist surface of buccal cavity - Non-keratinized stratified squamous epithelium

Inner surface of bronchioles - Ciliated columnar epithelium

Answer: (d)

Cells of smooth muscle tissue are spindle-shaped and pointed at their ends. Striations are absent due to different arrangement of actin and myosin filaments. Smooth muscle is the earliest form of muscle to evolve.

Answer: (a)

Answer: (c)

Answer: (d)

Answer: (a)

Simple squamous epithelium is composed of large flat cells whose edges fit closely together like the tiles on a floor, hence it is also called pavement epithelium. The nuclei of the cells are flattened and often lie at the centre of the cells causing bulgings of the cell's surface. The epithelium lines the blood vessels, lymph vessels, heart, terminal bronchioles, alveoli of the lungs, walls of the Bowman's capsules, and descending limbs of the loop of Henle. In the blood vessels and heart, it is called endothelium.

Answer: (a)

Answer: (d)

In insect, cleavage is superficial.

Answer: (b)

Cartilage is avascular, as the blood vessels innervate only the perichondrium through which nutrition diffuses into cartilage cells. The cornea is also avascular.

Answer: (a)