QuestionSBA
QuestionChoice
TSH increases protein synthesis in thyroid follicular cells. It also increases DNA replication, cell division and the amount of rough endoplasmic reticulum.
10006726
a
TSH decreases protein synthesis in thyroid follicular cells
QuestionChoice
T3 also acts on the liver, has metabolic actions and is required for growth and nervous system development.
10006727
b
T3 stimulates carbohydrate absorption from the small intestine and increases fatty acid release from adipocytes
QuestionChoice
TBG is produced in the liver, and reversibly binds to T3 and T4.
10006729
d
In the bloodstream T3 and T4 bind to Thyroxine-Binding Globulin (TBG)
QuestionChoice
TSH acts on the thyroid gland to secrete T3 and T4. T4 is converted to T3 and acts on its target cells. The rise in T3 causes a negative feedback loop on the anterior pituitary to inhibit TSH and TRH.
10006728
c
Thyroid-stimulating hormone (TSH) actions are inhibited through a negative feedback loop
QuestionChoice
T4 is the most abundant form, but T3 is the biologically active form.
10006730
e
T4 is converted to T3 in peripheral tissues by 5’-deiodinase
Concept
Chapter
2693
3834
Thyroid Axis
Topic
167
Endocrine physiology
13892
Which of the following is false with regards to thyroid hormones?
a