Which one of the following does the Letter “B” in the shape…

Which one of the following does the Letter “B” in the shape represents   1. Information about body temperature is sent through afferent pathways to the brain 2. Free nerve endings in the skin detect changes in skin temperature (getting colder) 3. Appropriate response information is sent through efferent pathways 4. A change in the temperature of the external environment (getting colder) 5. Skeletal muscles respond with shivering reflex which provides heat to return the body’s temperature to a homeostatic balance or “ideal” value

Dr. Song discovered circuit proteins responsible for negativ…

Dr. Song discovered circuit proteins responsible for negative feedback loop for HPT-axis and switched to positive feedback control loop instead. Describe what would happen to thyrotropin releasing hormone, thyrotropin, and thyroxine when thyroxine level is lower than the normal level (lower than the set point).