Examlex
Extant microorganisms are organisms from the fossil record that are no longer present on Earth today.
Thyroid Gland
A gland in the neck that produces hormones regulating heart rate, body temperature, and metabolism.
Hormones
Chemical messengers produced by glands in the body that regulate physiological activities by signaling to organs and tissues.
Autocrine
a mode of hormone action where a hormone acts on the same cell that produced it.
Hypothyroidism
A condition where the thyroid gland is underactive, resulting in a deficiency in thyroid hormones affecting metabolism.
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