Question

compare the difference between positive and negative feedback loops in humans using examples for each. your answer

Explanation:

• Negative feedback loop: Works to maintain homeostasis. For example, in body temperature regulation. When body temperature rises (stimulus), thermoreceptors detect this, send signals to the hypothalamus (control center). The hypothalamus then triggers responses like sweating (effector). Sweating cools the body down, reducing the original stimulus (temperature rise). So, it counter - acts the change to bring the body back to a stable state.
• Positive feedback loop: Amplifies a change. For example, in childbirth. When the baby's head presses on the cervix (stimulus), the cervix stretches. Nerve impulses are sent to the brain (control center), which signals the pituitary gland to release oxytocin (effector). Oxytocin causes stronger uterine contractions, which further stretch the cervix (amplifying the original stimulus). This loop continues until the baby is born.

Answer:

Negative feedback loops counter - act changes to maintain homeostasis (e.g., body temperature regulation). Positive feedback loops amplify changes (e.g., childbirth).