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What element is necessary for the production of triiodothyronine (T3) and thyroxine (T4)?

amino acid hormones enter the nucleus of the target cell and bind to a receptor.

When comparing the endocrine system and the nervous system, the endocrine system generally

Hyposecretion of GH in children is referred to as:

upregulation refers to the cells ability to do which of the following?

The major secretory products of the zona glomerulosa of the adrenal cortex are;

Most of the amino acid–based hormones affect the target organs using _______.

The figure illustrates the posterior view of the thyroid gland. What does “E” represent? 

Match the following descriptions with the appropriate endocrine gland. Identify the gland that is the target organ of thyroid-stimulating hormone.

Match the following descriptions with the appropriate endocrine gland. Identify the gland that stores hormones produced by the hypothalamus.