The secretes hormones that regulate the body's fluid levels. a. adrenal b. pituitary c. testes d. thyroid

Step 1: Define the Problem

Identify which gland secretes hormones that regulate the body's fluid levels.

Step 2: Break Down the Problem

Examine the function of each gland listed in the options:

• Adrenal
• Pituitary
• Testes
• Thyroid

Step 3: Apply Relevant Concepts

• Adrenal Glands: Produce hormones like aldosterone, which helps regulate sodium and potassium levels, thus influencing fluid balance.
• Pituitary Gland: Produces antidiuretic hormone (ADH), which directly regulates water balance in the body.
• Testes: Primarily produce testosterone, not directly involved in fluid regulation.
• Thyroid Gland: Produces hormones that regulate metabolism, not directly involved in fluid balance.

Step 4: Analysis, Verify and Summarize

• Adrenal Glands: Involved in fluid regulation through aldosterone.
• Pituitary Gland: Directly regulates fluid balance via ADH.

Final Answer

b. pituitary