Question

As we discussed in Week 1, maintenance of homeostasis is critical to the proper functioning of our bodies; the endocrine system plays a large role in this process. Let's kick off our discussion by considering some of the feedback loops in the endocrine system. Can you give an example?

Pick an organ or a function of the endocrine system, and identify the parts of a feedback loop for that particular organ or function—stimulus, receptor, control center, effector, and response.

The endocrine system is complicated, but we're going to break it down this week! Let's start by describing each endocrine organ and how it is controlled by a feedback loop.

Choose an endocrine organ. What hormones does your organ produce? What tissues do those hormones affect?

Answer 1

Lets have hypothalamus as an endocrine organ.

Let temperature of body falls.( Stimulus)

(Control centre) of temperature is hypothalamus.

Hypothalamus produce thyrotropin releasing hormone.(TRH)

TRH stimulates anterior pituitary to release thyroid stimulating hormon. (TSH).

TSH stimulates thyroid gland to release thyroxine .

Thyroxine will raise the temperature.( Response)

Once temperature regulated ,then this THYROXINE will inhibit the secretion from anterior pituitary and hypothalamus. This is called negative feedback