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Flashcards in ToB - Glands Deck (11):
0

How can secretion be controlled?

Endocrine (hormone)
Nervous (impulse)
Neuroendocrine (ACTH secretion by NS of hypothalamus)
Negative feedback

1

Where are goblet cells, what type of gland are they and what is their function and features?

Jejeunum and duodenum
They produce and secrete mucus
Unicellular
Exocrine

2

Where is the parotid gland, what type of gland is it and what is its secretion type and features?

Exocrine
In the oral cavity
30% saliva output
Serous secretion
Develops adipose tissue with age

3

Where is the submandibular gland, what type of gland is it and what is its secretion type and features?

Exocrine
Secrete under tongue, lie in mandible of neck
Tubuloacinar
Mixed gland
Develops adipose tissue with age

4

Where is the sublingual gland, what type of gland is it and what is its secretion type and features?

Exocrine
Under the tongue
Mixed gland but MAINLY MUCOUS
Acini

5

Where is the pancreatic gland, what type of gland is it and what is its secretion type and features?

Endocrine and exocrine.
Found behind the stomach, lying in the curve of the duodenum

Exocrine
= acini with basal nuclei
= trypsin, elastase, chymotrypsin, carboxypeptidase

Endocrine
= islets of Langerhan

6

Where is the thyroid gland, what type of gland is it and what is its secretion type and features?

Endocrine
Anterior to the lower larynx and the trachea, wrapped around the cricoid cartilage.
Secretes T3/4 which act to increase metabolic rate
Glands are formed from simple cuboidal epithelia

7

Where is the adrenal gland, what type of gland is it and what is its secretion type and features?

Endocrine
Sits on top of each kidney
Secretes steroid hormones and adrenaline/noradrenaline

8

Where is the parathyroid gland, what type of gland is it and what is its secretion type and features?

Endocrine
On the posterior of the thyroid gland, usually 4 of them
Contain chief cells and oxyphil cells
Chief cells produce and secrete PTH = promotes uptake of Ca2+ in gut, retention in kidney and release from bone.

9

What is the definition of a gland?

A group of epithelial cells specialised for secretion.

10

In what ways can glands be classified?

1). Nature of secretion.
- serous
- mucous
- mixed

2). Destination of secretion
- endocrine
- exocrine

3). Structure of secretory part
- unicellular/multicellular
- acinar/tubular
- coiled/branched

4). Method of secretion
- merocrine
- apocrine
- holocrine