Question

1. define the word part gero-.

fluid
old or old age
life cycle
origin

1. an under - production of thyroxine is known as:

myxedema
goiter
acromegaly
hypothyroidism

Explanation:

1. In medical - etymology, the prefix "gero -" is related to old age.
2. Hypothyroidism is characterized by under - production of thyroxine. Myxedema is a severe manifestation of hypothyroidism, goiter is an enlargement of the thyroid gland often due to iodine deficiency, and acromegaly is related to excessive growth hormone secretion.

Answer:

1. old or old age
2. Hypothyroidism