Science unit 2 test on book

Homeostasis

The process in which living things maintain stable internal conditions.

Positive Feedback Mechanism

A feedback mechanism that increases the initial change, such as hormone levels in the blood increasing during childbirth.

Effector

A component in a feedback mechanism that produces a change to help maintain homeostasis, such as skeletal muscles that contract to produce heat.

Guard Cells

Cells that help plants maintain homeostasis by regulating the opening and closing of stomata to control water loss.

Antibodies

Proteins produced by the immune system in response to foreign substances (antigens) to help recognize and eliminate them.

Killer T Cells

Immune cells that kill infected body cells to prevent the spread of infection.

Autoimmune Disorder

A condition where the immune system mistakenly treats the body's own cells as invaders.

Antibiotic Treatment

A medical treatment designed to eliminate bacterial infections.

Negative Feedback Loop

A mechanism that reverses a change in the body to maintain homeostasis, such as blood sugar returning to normal levels after insulin is released.

Infectious Diseases

Diseases caused by pathogens such as bacteria, viruses, or parasites.