In the blood,A) most T 3 and T 4 molecules are found bound to thyroxine-binding globulin (TBG) .B) T 3 and T 4 are rapidly metabolized.C) T 3 is converted into T 4 .D) T 3 but not T 4 is bound to TSH.E) most thyroid hormones are transported in a free form.

Question

In the blood,A)  most T 3  and T 4  molecules are found bound to thyroxine-binding globulin (TBG) .B)  T 3  and T 4  are rapidly metabolized.C)  T 3  is converted into T 4 .D)  T 3  but not T 4  is bound to TSH.E)  most thyroid hormones are transported in a free form.

Annamarie Tupper · Accepted Answer

Final Answer : A, Explanation :  Most thyroid hormones (T3 and T4) in the blood are bound to thyroxine-binding globulin (TBG), with only a small fraction circulating in a free form.

In the blood,

A) most T₃ and T₄ molecules are found bound to thyroxine-binding globulin (TBG) .
B) T₃ and T₄ are rapidly metabolized.
C) T₃ is converted into T₄.
D) T₃ but not T₄ is bound to TSH.
E) most thyroid hormones are transported in a free form.

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Learning Objectives

Related questions

In the blood,A) most T3 and T4 molecules are found bound to thyroxine-binding globulin (TBG) .B) T3 and T4 are rapidly metabolized.C) T3 is converted into T4.D) T3 but not T4 is bound to TSH.E) most thyroid hormones are transported in a free form.

Definitions

Learning Objectives

Learning Objectives

Related questions

In the blood,

A) most T₃ and T₄ molecules are found bound to thyroxine-binding globulin (TBG) .
B) T₃ and T₄ are rapidly metabolized.
C) T₃ is converted into T₄.
D) T₃ but not T₄ is bound to TSH.
E) most thyroid hormones are transported in a free form.