Ch. 18 - Endocrine Glands Flashcards
1
Q
The thyroid gland secretes _______ amounts of tetraiodothyronine and _______ amounts of triiodothyronine.
A
large; small
2
Q
What happens when thyroxine enters target cells?
A
• both T3 and T4 enter target cells but all the T4 that enters is converted into T3
3
Q
Which of the following statements about thyroxine is true?
A) it is water insoluble
B) it is lipophilic
C) it cannot pass through the cell membrane
D) it is water insoluble and lipophilic
E) it is water insoluble, lipophilic, and cannot pass through the cell membrane
A
D) it is water in soluble and lipophilic
