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Sublingual gland

contains serous demilune of Gianuzzi.

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

is mostly serous.

is a simple tubular.

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has serous glandulae oesophageales in the submucosa.

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

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

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

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

Saliva contains lysozyme with antibacterial activity.

Saliva dissolves substances that stimulate the taste buds.

Serous cells form the secretory component of IgA.

The secretion of serous cells contains proteins.

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contains numerous lymphoid nodules.

is a part of the cecum and shares with it the histological structure of the large intestine.

the individual taenia of the outer longitudinal muscle layer fuse here.

its mucosa is lined with simple columnar epithelium with numerous goblet cells.

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is the passive transfer of substances across the inner nuclear membrane.

can be mediated by specific receptors on the cell surface.

is a sign of vesicle transport between the endoplasmic reticulum and the cis-side of the Golgi complex.

involves the phagocytosis of solid particles or the pinocytosis of liquid contents into the interior of the cell.

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Human nuclear DNA

is organized into heterochromatin (microscopically dense) and euchromatin (light in the optical microscope).

is divided into 23 pairs of chromosomes in somatic cells; they are visible during mitosis.

binds to basic histone proteins in somatic cells, with which it forms chromatin.

has a positive charge due to the large number of phosphate groups; therefore, it binds electrostatically to negatively charged histones.

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Endoplasmic reticulum

exists in granular (rough, with attached ribosomes) and agranular (smooth) forms.

consists of a dense network of cytoskeletal proteins.

is the site of synthesis of new tRNA molecules.

is essential for the production of most proteins exported from the cell to its surrounding area.

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Gap junction (nexus)

is necessary, for example, for coordinated transmission of impulses between cardiomyocytes.

is composed of a pair of connexons, each of which has six proteins (connexins).

forms a hydrophilic channel between adjacent cells; it can open or close.

allows electrically conductive connection between adjacent cells.

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are heterodimers of α and β tubulin molecules with the ability to grow and shorten.

are a branched triple helix of tightly cross-linked molecules.

are part of the division spindle, cilia, and flagella.

are called neurotubules in neurons and are involved in axonal transport.

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are double-membrane organelles that form proteins in the cell nucleus and nucleolus.

are composed of two subunits.

bind to mRNA in large numbers to form polysomes.

translate a sequence of mRNA bases into a sequence of tRNAs to form a polypeptide chain.

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