Homeostasis and Feedback Mechanisms

These flashcards cover key concepts related to homeostasis and feedback mechanisms, including positive feedback examples, harmful effects, and impacts of different conditions on homeostasis.

Positive Feedback

A mechanism in which the body's response increases or amplifies the initial change instead of correcting it.

Childbirth

An example of positive feedback where the baby's head stretches the cervix, leading to the release of oxytocin and stronger contractions.

Stimulus (Childbirth)

The baby's head pressing against the cervix.

Oxytocin

A hormone released by the pituitary gland that stimulates uterine contractions during childbirth.

Blood Clotting

An example of positive feedback where platelets clump together and attract more platelets to form a clot.

Stimulus (Blood Clotting)

Damage to a blood vessel.

Platelets

Cell fragments that detect injury in blood vessels and initiate clot formation.

Harmful Effects of Positive Feedback

Can include uncontrolled fever, chronic high blood pressure, and uncontrolled blood clotting.

Iron Deficiency

A condition that impairs the body's ability to produce sufficient hemoglobin, affecting oxygen transport.

Insufficient Sleep

Prevents internal systems from restoring balance and may lead to irregular heartbeats and fatigue.

Drug Overdose

Exposure to toxins that disrupt normal cellular function, affecting vital signs.

Genetic Mutation

Disruptions in homeostasis that arise from DNA damage or mutations that lead to uncontrolled growth.

Dehydration

A condition resulting from insufficient water intake, leading to disrupted fluid balance and organ function.

Extreme Temperature Exposure

Challenges the body's ability to maintain stable internal temperature, potentially leading to heatstroke or hypothermia.

Homeostasis

A continuous process that maintains the body's internal environment stability through feedback mechanisms.

Nervous System

Organ system responsible for control of behavior and body systems; key organs include the brain and spinal cord.

Endocrine System

Organ system that controls body systems and development through hormones.

Cardiovascular System

Organ system that transports materials through the body, including the heart and blood vessels.