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Which statement/s is/are

correct about skin glands?

The sweat gland has the shape of a simple coiled tubular gland.

The sebaceous gland is a type of holocrine gland.

The eccrine sweat glands are found in both thick and thin skin types.

Apocrine sweat glands are found on the palms of the hands.

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are found e.g. in the acini of the pancreas.

have a flattened nucleus at the basal part of the cell.

are found e.g. in the epithelium of the small intestine mucosa.

contain mucous granules that stain lightly with haematoxylin-eosin.

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Endocrine glands

their cells may be arranged in fascicles, trabeculae or follicles, between which we find blood capillaries.

are those that retain their connection to the surface epithelium.

their hormones affect target cells by endocrine signalling (via the bloodstream over a longer distance), paracrine signalling (via the cellular environment over a shorter distance) or autocrine signalling (the producing cells also have receptors for the hormone).

release their products into the surrounding tissue or blood capillaries.

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Simple columnar epithelium is present

on the surface of the duodenal mucosa.

on the surface of the esophageal mucosa.

on the surface of the gingival mucosa (gingiva).

on the surface of the uterine mucosa.

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Pseudostratified epithelium

has cells arranged in many layers.

an example is the epithelium of the stomach, intestine and gallbladder.

all its cells remain attached to the basal lamina but have nuclei at different heights from the basal lamina.

an example is the epithelium of the buccal mucosa.

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Cilia (kinocilia)

contain a central pair of microtubules, surrounded by 9 other pairs of microtubules.

use molecular motors for active movement, e.g. dynein.

form the brush border of enterocytes in the intestinal epithelium.

are located on the apical surface of cells, e.g. epithelium of the uterine tube or trachea.

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Nonkeratinized stratified squamous epithelium

is lining e.g. vaginal mucosa.

covers e.g. the mucosa of the vocal folds (cords).

covers e.g. the surface of the oesophageal mucosa.

is lining e.g. the mucosa of the colon.

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Simple cuboidal epithelium is present

in the secretory and ductal parts of the eccrine sweat glands.

in the distal tubule of the nephron.

in the follicles of the thyroid gland.

on the surface of the gastric mucosa.

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Which statement/s is/are

correct about intercellular junctions?

The tight junction (zonula occludens) prevents paracellular transport.

The desmosome (macula adhaerens) and the adhesive belt (zonula adhaerens) are responsible for cohesion between cells.

The gap junction (nexus) mechanically anchors the basal pole of cells to basal lamina proteins.

The belt tight junction (zonula occludens) is located near the apical surface of the cell.

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Serous demilune

is composed of serous cells only.

is present in seromucous glands such as the submandibular salivary gland.

is composed of mucous cells in the duct and serous cells in the apex of the acinus.

is present in purely serous glands, such as the exocrine part of the pancreas.

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