Glands (epithelial tissue 2)

Question 1

endocrine glands

Answer 1

Endocrine glands produce hormones and are always rich in capillaries. Hormones are released outside the cells and picked up by these blood vessels for distribution throughout the body, where specific target cells are identified by receptors for the hormones. Endocrine glands can have secretory cells arranged as irregular cords or as rounded follicles with lumens for temporary storage of the secretory product.

Question 2

exocrine glands

Answer 2

Exocrine glands secrete substances to specific organs via duct systems

• have ducts that lead to another organ or the body surface. Inside the gland the duct runs through the connective tissue of septa and branches repeatedly, until its smallest branches end in the secretory portions of the gland.

Question 3

edocrine glands are _____ in origin

Answer 3

epithelial

Question 4

endocrine glands secrete into _____ ______ either directly or through internal space

Answer 4

blood stream

Question 5

what are the 3 structures of exocrine glands?

Answer 5

tubular, acinar and alveolar

Question 6

what are the 3 basic types of secretion?

Answer 6

merocrine, holocrine, apocrine

Question 7

describe merocrine secretion

Answer 7

secretion releases products, usually containing -proteins, by means of exocytosis at the apical end of the secretory cells.

Question 8

most exocrine glands are _________

Answer 8

merocrine

Question 9

describe holocrine secretion

Answer 9

secretion is produced by the disintegration ofthe secretory cells themselves as they complete -their terminal differentiation, which involves becoming filled with product. Sebaceous glands of hair follicles are the best examples of holocrine glands.

Question 10

_______ _______of hair follicles are the best examples of holocrine glands.

Answer 10

Sebaceous glands

Question 11

describe apocrine secretion

Answer 11

secretion involves loss of membrane-enclosed apical cytoplasm, usually containing one or more lipid droplets.

Question 12

Apocrine secretion, along with merocrine secretion, is seen in _______ _______

Answer 12

mammary glands

Question 13

mucous cells of salivary glands are typically larger than ______ cells

Answer 13

serous cells

Question 14

describe serous cells

Answer 14

The small serous acini of the exocrine pancreas each have 5-10 cells facing a very small central lumen. Each acinar cell is roughly pyramidal, with its apex at the lumen.As seen by light microscopy, the apical ends are very eosinophilic due to the abundant secretory granules present

Question 15

describe mucous cells

Answer 15

typically larger than serous cells, with flattened basal nuclei. Most of the cytoplasm is filled with secretory granules containing mucinogen like that of goblet cells. The RER and Golgi complexes of mucous cells produce heavily glycosylated glycoproteins with water-binding properties