Homeostasis (Reading Notes)

Nervous and endocrine systems regulate body systems together

Nervous system controls all body activities, endocrine secretes hormones to regulate activity, supplying blood cells with needs and eliminating wastes.

Temperature, pH, and more is also regulated

Homeostasis is regulated by nervous and endocrine systems to maintain balance and stability despite external changes affecting internal environment

Negative feedback loops maintain homeostasis to counter stimulus (high body temp, a loops with bring it back down)

Vasoconstriction is when blood cells narrow to reduce heat loss and raise body temperature

Vasodilation is when blood cells expand to increase oxygen to body and sweating and lower body temperature

The hypothalamus is the part of the brain regulating homeostasis

Effectors are part of the body working to respond to a change (blood vessel dilation and constriction, shivering, muscle contractions, sweat glands, hormones releases)

Receptors are cells in sense organs that receive information thtat there has been a change and work to respond

The set body temperature is 37 C

Thermoreceptors in the skin sense temperature

A positive feedback loop increases the stimulus, moving away from homeostasis and amplifying effects

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