Questions: BIO-202L. Topic 1: Endocrine System (Macroscopic and Microscopic) PRACTICE IT LO 1.2. What is the primary function of the endocrine system? - Transport oxygen through the bloodstream. - Control the immune system through the release of antibodies. - Maintain homeostasis through the regulation of body temperature. - Regulate bodily functions through the release of hormones. - Digest food through the secretion of enzymes.

The answer is the fourth one: Regulate bodily functions through the release of hormones.

Explanation for each option:

• Transport oxygen through the bloodstream: This is incorrect. The primary function of transporting oxygen is carried out by the circulatory system, specifically through red blood cells.

• Control the immune system through the release of antibodies: This is incorrect. The immune system is responsible for the production and release of antibodies, not the endocrine system.

• Maintain homeostasis through the regulation of body temperature: This is partially correct, as the endocrine system does play a role in maintaining homeostasis, but it does so through hormone regulation, not directly through temperature control. Temperature regulation is more directly managed by the nervous system and the hypothalamus.

• Regulate bodily functions through the release of hormones: This is correct. The primary function of the endocrine system is to regulate various bodily functions by releasing hormones into the bloodstream, which then act on different organs and tissues.

• Digest food through the secretion of enzymes: This is incorrect. The digestive system is responsible for the secretion of enzymes necessary for digestion, not the endocrine system.

In summary, the primary function of the endocrine system is to regulate bodily functions through the release of hormones.