Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

Username is available taken
show password

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


iodine deficiency leads to lack of thyroid hormone production (Hypothyroidism). Leads to mental retardation, cretinism in fetus
T3 is 4-8x more active metabolically than T4. T3 is ‘active’ form of thyroid hormone; T4 ‘pre-’ hormone; thyroglobulin ‘pro’ hormone Released T4 converted to T3 by liver and kidney
Three major thyroid hormone binding proteins: 1. Thyroxine-binding globulin (TBG) 2. Thyroxine-binding prealbumin (TBPA; transthyretin) 3. Albumin T4 and T3 levels affected by levels of available binding proteins.
Graves’ disease: most common cause of hyperthyroidism; antibody to TSH receptor protein; receptor stimulation leads to thyroid growth; excessive levels of thyroid hormone produced; diagnosed with tests to measure antibodies to TSH receptor. Lab testing: high free T4 and/or T3 level with undetectable TSH; thyroid stimulating antibodies (TSIs) and TSH receptor antibodies usually positive.
Chronic lymphocytic thyroiditis (Hashimoto’s thyroiditis): hypothyroidism; antibodies result in decreased thyroid hormone production Low free T4 level with a normal or high TSH
TSH Specimen collection and storage: serum or plasma with EDTA or heparin. Specimens stable at 4oC for 24h or -20oC for 1 month. Reference Intervals (Total T4; nmol/L): Adults: Males and females 59-135nmol/L.
Created by: mastergogo
Popular Laboratory Science sets




Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
restart all cards