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Islets of Langerhans in pancreas

are composed of endocrine epithelium arranged in follicles with a simple cuboidal epithelium.

contain blood sinusoids.

contain centroacinar cells.

produce hormones.

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Which statement/s is/are correct about islets of Langerhans in pancreas?

B-cells produce insulin.

Glucagon-producing A-cells tend to be on the periphery of the islets.

They are of embryonic ectodermal origin, which distinguishes them from the entodermal exocrine part of the pancreas.

B-cells are the most numerous, making up 60-80% of cells.

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Which statement/s is/are correct about tooth?

Periodontal ligaments have a rapid turnover of proteins, therefore their condition may change, e.g. in connective tissue metabolism disorders.

Cementum covers the root of the tooth.

After the tooth eruption is completed, new dentin is no longer formed.

Dentin contains type I collagen fibrils and hydroxyapatite crystals.

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Which statement/s is/are correct about palate?

The oral mucosa of the soft palate is covered with stratified squamous non-keratinized epithelium.

Taste buds are missing on the soft palate.

In the centre of the soft palate, there is skeletal striated muscle.

The base of the hard palate is bone, the mucosa is attached to the periosteum.

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Which statement/s is/are correct about liver?

Perisinusoidal space of Disse separates the endothelium of sinusoids from the vascular surface of hepatocytes.

In the classical hepatic lobule, the hepatocytes are arranged radially between the portal areas towards the central vein.

Central vein is in the middle of the classical morphological hepatic lobules.

Hepatic sinusoids do not have a continuous lamina basalis.

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Which statement/s is/are correct about large intestine?

It is lined with a simple columnar epithelium.

The mucosa creates villi, which increase the resorption surface.

Its mucosa contributes significantly to water absorption.

The external longitudinal muscular layer of the tunica muscularis externa forms three taeniae coli.

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has serous glandulae oesophageales in the submucosa.

has tunica muscularis externa that is composed of smooth muscle throughout the esophagus.

has a wall composed of 4 basic layers: mucosa, submucosa, muscle and adventitia (or serosa).

is covered mostly with adventitia, only in the abdominal cavity is serosa.

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Sublingual gland

contains serous demilune of Gianuzzi.

is mostly serous.

is a simple tubular.

has the longest main duct of all the major salivary glands.

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Which statement/s is/are

correct about duodenum?

Enterocytes have microvilli on their surface.

Paneth cells contain eosinophilic granules.

The lining consists of a simple columnar epithelium with goblet cells.

M (microfold) cells overlap lymphoid follicles.

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Which statement/s is/are correct about salivary glands?

Serous cells form the secretory component of IgA.

The secretion of serous cells contains proteins.

Saliva contains lysozyme with antibacterial activity.

Saliva dissolves substances that stimulate the taste buds.

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