Homeostasis How does the body regulate its internal

Homeostasis How does the body regulate it’s internal conditions?

Homeostasis • Homeostasis: regulation and maintenance of the internal environment • Maintains: • Temperature • p. H (Acidity) • Water Levels • Concentration of Molecules (Glucose/Salt)

Feedback Mechanisms • Feedback Mechanism: control mechanism that detect variations in internal conditions and the body’s response to them Feedback compares current conditions to set ranges • Three Components • Two Types

Feedback Mechanisms: Components 1. Sensory/Receptor 2. Control Center 3. Effector

Feedback Mechanisms: Types 1. Positive Feedback 2. Negative Feedback

Feedback Mechanisms: Positive Feedback increases change away from set points

Feedback Mechanisms: Negative feedback counteracts change to conditions above or below set point

Let’s Try: Breathing rate increases while running to keep oxygen moving into the muscle cells

Let’s Try: NEGATIVE FEEDBACK

Let’s Try: Blood clotting to begin healing a wound

Let’s Try: POSITIVE FEEDBACK

Let’s Try: Your stomach growling in hunger

Let’s Try: NEGATIVE FEEDBACK

Let’s Try: Going outside on a hot day and sweating to keep your body temperature from rising too high

Let’s Try: NEGATIVE FEEDBACK

Let’s Try: A ripe apple on a tree produces a molecules that causes the other apples on the tree to ripen as well.

Let’s Try: POSITIVE FEEDBACK