| For each item below, use the pull-down menu to select the letter that labels the correct part of the image. |
| 4.1 Iodine is attached to tyrosine in colloid |
 |
|
|
| 4.2 Thyroglobulin synthesized/discharged into follicle lumen |
 |
|
|
| 4.3 Iodinated tyrosines are linked to form T3 & T4 |
 |
|
|
| 4.4 Enzymes cleave T3 & T4 from colloid/hormones diffuse into blood |
 |
|
|
| 4.5 Iodide is actively transported in |
 |
|
|
| 4.6 Thyroglobulin colloid is combined with lysosome |
 |
|
|