Which of the following epithelium their main function is to provide protection against chemical and mechanical stresses?

1. Simple epithelium.
2. Compound epithelium.
3. Columnar epithelium.
4. Cuboidal Epithelium

Compound epithelia is present in -
1. Dry surface of the skin.
2. Moist surface of buccal cavity.
3. Inner lining of ducts of salivary gland.
4. All of these

Which of the following statement is incorrect with respect to Rana tigrina?
1. Muscular tongue is bilobed at tip and free from behind
2. Maxillary teeth are arranged along the margin of upper jaw and lower jaw is toothless
3. Tadpole larva of frog is with comparatively short alimentary canal than adult
4. Tail is present in the life cycle of frog

Match the following cell structure with its characteristic feature:

Select the correct option from the following:

Intercalated disc are a type of
1. Adherent junction.
2. Desmosomes.
3. Communicating junction.
4. Tight junction

In __i__, the collagen fibres are present in rows
between parallel bundles of fibres. It is an example of
dense __ii__ connective tissue
1. i-cartilage; ii-regular
2. i-cartilage; ii-irregular
3. i-tendon; ii-irregular
4. i-tendon; ii-regular

Cell junctions like tight, adhering, and gap junctions are mainly present between the neighbouring cells of:

1. Neural tissue

2. Connective tissue

3. Muscular tissue

4. Epithelial tissue

Which of the following is a true statement about
cardiac muscle cells?

1. They lack an orderly arrangement of actin and
myosin filaments

2. They have less extensive sacroplasmic reticulum
and thus contract more slowly than smooth
muscle cells

3. They are connected by intercalated discs,
through which action potentials spread to all cells
in the heart

4. They have a resting potential more positive than
an action potential threshold

Which of the following structures or substances is
incorrectly paired with a tissue ?
1. Haversian system—bone
2. platelets—blood
3. fibroblasts—skeletal muscle
4. chondroitin sulfate—cartilage

Cartilage is present

A. In the tip of nose and middle ear joints

B. Between adjacent bones of vertebral column

C. Between adjacent bones of limbs and hands in adults

1. A, B and C

2. A and B

3. B and C

4. A and C