2nd Semester Final Exam - Homeostasis Only

Nervous System

Sends signals to respond to environment

Endocrine System

Produces hormones to regulate activities

Circulatory System

Delivers blood and all the needed nutrients to and from parts of the body. Also picks up waste and delivers it to waste removal organs.

Respiratory System

Take in oxygen and remove carbon dioxide

Excretory System

Cleans and filters blood and produces urine

Immune System

Fights pathogens and protects against diseases

Diffusion

Molecules move from a high concentration to a low concentration

Cell Membrane

Protective barrier around a cell that allows particles to move in and out based on size and charge

Permeable

The particle is able to pass through a membrane

Facilitated Diffusion

Molecules move from a high concentration to a low concentration with the help of protein channels in the cell membrane

Osmosis

Diffusion of water

Homeostasis

Balanced internal physical and chemical conditions

Tissue

Group of similar cells that perform a particular function

Organ

Group of tissues that work together to perform closely related functions

Organ System

Group of organs that work together to perform a specific function

digestive system

Breaks down food into smaller molecules. Absorbs these nutrients into the blood.

negative feedback

A type of feedback that responds to a change in conditions by initiating responses that will counteract the change. Maintains homeostasis.

positive feedback

Feedback that tends to magnify a process or increase its output. Does not maintain homeostasis.