Thryroid glands Flashcards

1
Q

What are some characteristics of the thyroid gland

A

Highly vascular
Little innervation
made of spherical follicles

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2
Q

What are the levels of thyroid hormone release

A

More T4 is released than T3
Circulating T4 is higher as well too also
Measure T4

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3
Q

Where is most circulating thyroid hormone

A

Bound to blood protein

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4
Q

What thryoid hormone is active

A

Free T4 or T3

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5
Q

What is thyroxine converted to in the tissue

A

T3

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6
Q

What is the biologically active hormone

A

T3

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7
Q

What does T3 bind to

A

receptors in the nucleus

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8
Q

What does T3 do

A

Increase expression in specific genes

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9
Q

What are the effects of thyroid hormone

A
Increase cell resperation
Increase O2 use
Heat generated
Increase cardiac output, muscle activity
Growth and development
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