17.8- Thyroid Gland Flashcards
1
Q
What are the cell type of the walls of follicle cells in the thyroid?
A
Simple cuboidal epithelial
2
Q
What is the viscous protein rich fluid that is inside the follicles of the thyroid gland?
A
Colloid
3
Q
Which cells of the thyroid synthesize and release calcitonin?
A
Parafollicular cells.
4
Q
What does thyroid hormone do on a cellular level?
A
Increases protein synthesis
5
Q
Is there more T4 or T3 in the blood?
A
More T4. T4 is 90% and T3 is 10%.
Specific emphasis on synthesis of sodium/potassium pumps.
6
Q
Calorgenic effect
A
the rise in temperature created by the action of sodium/potassium pumps.
7
Q
Why is calcitonin released from parafollicular cells?
A
High blood calcium levels- inhibits osteoclast activity in the bone tissue and stimulates kidneys to increase loss of calcium.
