GIT 2

Question 1

Describe the function of the Centri-acinar zone (zone 1) of the liver acinus

Answer 1

It is the site of gluconeogenesis, protein synthesis and aerobic metabolism.

Question 2

Describe the function of the periacinar zone (zone 3) of the liver acinar

Answer 2

Sure of glycolysis lipogenesis and biotransformation

Question 3

What is the function of follicular cells?

Answer 3

Important hormonal cells that produce thyroid hormone

Question 4

What is colloid?

Answer 4

A protein rich suspension of thyroglobulin located within the thyroid.

Question 5

Describe the structure and function of parafollicular C cells

Answer 5

They occur as single cells or little groups in the basal lamina of a follicle. They have a light staining cytoplasm, and numerous secretory granuals. They secrete calcitonin.

Question 6

Describe the structure of a follicular cell.

Answer 6

Polar cell, basal nucleus, central Golgi apparatus, with microvilli at the apical surface.

Question 7

Describe the function of the parathyroid gland

Answer 7

Produces parathyroid hormone which acts to mobalise stores of calcium. Does it by increase absorption from GIT and reabsorption from bone, and decreases loss in urine.It also functions in phosphoruse levels.