Homeostasis is best described as:

The maintenance of a stable internal environment

Which is the correct order of feedback-loop parts?

Stimulus, receptor, control center, effector, response

Cell, tissue, organ, organ system, organism

They are interdependent, so each relies on others to keep the organism alive

Diffusion down concentration gradients

The respiratory system exchanges gases at the lungs and the circulatory system transports them to cells

Stimulus, receptor, sensory neuron, central nervous system, motor neuron, effector, response

Binds to a specific antigen on a pathogen, marking it for destruction

It contains a harmless form or piece of the pathogen that triggers antibodies and memory cells

Memory cells from the vaccine recognize it and produce antibodies quickly

14questions. Pick an answer and you'll see why right away.

Homeostasis is best described as:
When a person gets too hot and sweats to cool back toward normal temperature, this is:
Which is the correct order of feedback-loop parts?
Which list shows the levels of organization from smallest to largest?
Why must organ systems work together rather than alone?
In the lungs, oxygen moves into the blood and carbon dioxide moves out by:
How do the circulatory and respiratory systems work together?
Which system uses hormones carried in the blood to control processes slowly and over a long time?
A person touches a hot stove and quickly pulls their hand away. This fast response is controlled by the:
Which best describes the stimulus-response pathway?
Which cells defend the body against pathogens, partly by producing antibodies?
An antibody is a protein that:
How does a vaccine give immunity without causing the disease?
Why does a vaccinated person respond faster if they later meet the real pathogen?