FREE NEET Biology Practice MCQ Test: Structural Organisation In Animals Exercise 4 Questions Answers With Detailed Explanations [PDF]

Answer: (c)

Areolar tissue is the most widely distributed loose connective tissue in the body. Tendon is a type of dense connective tissue, adipose tissue is a fat-storing loose connective tissue and cartilage is a specialised connective tissue.

Answer: (b)

Presence of air passages in the bones (pneumatic bones) is a characteristic of birds.

Answer: (b)

Skeletal muscle tissue is closely attached to sketetal bones. In a typical muscle such as the biceps, striated (striped) skeletal muscle fibres are bundled together in a parallel fashion.

Answer: (a)

Answer: (d)

A tendon is a fibrous connective tissue which attaches skeletal muscle to bone. Tendons may also attach muscles to structures such as eyeball. A tendon help in the movement of bone or structure.

Answer: (c)

Answer: (c)

Yellow elastic fibrocartilage, a type of skeletal tissue, is found in the pinna, Eustachian tubes, epiglottis and tip of the nose. It is a type of cartilage and due to presence of yellow fibres, it becomes more flexible.

Answer: (d)

Answer: (a)

Answer: (a)

Answer: (b)

Answer: (c)

Frog's heart is myogenic, i.e., heartbeat originates from muscles of heart. Hence, it is autorhythmic. Wave of contraction originates from sinus venosus and spreads to wall of sinus venosus and both auricles. This compels the heart to beat. Due to this reason, frog's heart will continue to beat as long as it gets supply of ATP.

Answer: (a)

Answer: (c)

There are three ganglia lie in the thorax, and six in the abdomen. Each eye consists of about 2000 hexagonal ommatidia.

Answer: (b)

Answer: (b)

Answer: (c)

Chondrocytes are the only cells found in cartilage. They produce and maintain the cartilaginous matrix, which consists mainly of collagen and proteoglycans. The chondrocytes lie between the muscle fibres. It is found in the epiglottis (part of the larynx) and the pinnae (the external ear flaps of many mammals including humans).

Answer: (d)

Answer: (c)

Cuboidal epithelium is a single layer of cube shaped cells with a centrally located nucleus. Ciliated epithelium is a type of bodily tissues that is lined with "ciliated" cells, which are basically cells that have small, hair-like protrusions known as "cilia" that can either help the cells move along the tissue or can help debris and waste move along the surface of the cells. Columnar epithelial cells occur in one or more layers. The cells are elongated and column-shaped. The nuclei are elongated and are usually located near the base of the cells. Squamous cells have the appearance of thin, flat plates. The shape of the nucleus usually corresponds to the cell form and help to identify the type of epithelium. Keratinized squamous epithelium consists of multiple layers of squamous cells. The apical layer of cells are dead and filled with the protein keratin.

Answer: (c)