Homeostasis & Functional Characteristics of Life

Sir Walter Cannon described "homeostasis" as

• your body's internal environment is the exact same at all times

• your body's ability to be manipulated by the external environment

• the ability to maintain a relatively stable environment, despite the ever-changing external environment

• the body's ability to fluctuate temperature based upon the external environment

The endocrine system plays a major role in

• active defense against pathogens

• hormone production

• gas exchange

• movement

The lymphatic system provides

• nutrients

• support for the body's structure

• mechanical breakdown of food

• extra defense against pathogens

On the organismal level, the _____ system helps our bodies to maintain boundaries.

• integumentary

• endocrine

• lymphatic

• respiratory

Negative feedback is when

• your body systems begin to shut down

• a variable triggers a negative response

• a variable triggers a counteractive response

• a variable triggers an equal response

A positive feedback loop moves a system further ____ the target of equilibrium.

• away from

• toward

• positive feedback loops are not involved in homeostasis

Which is NOT an example of negative feedback?

• blood clotting

• thirst sensation

• shivering

• sweating

After digestion, the _____ system transports these newly simplified molecules to other parts of the body.

• cardiovascular

• lymphatic

• endocrine

• integumentary

In order for growth to occur, there must be more ______ than _____.

• oxygen intake, carbon dioxide

• constructive activities, destructive activities

• nutrients, usage

• nutrient-rich blood, excretion

Metabolism is responsible for

• transporting nutrient-rich blood across our body

• admitting needed substances while restricting damaging substances

• disposing of nitrogen-containing metabolic wastes

• using nutrients and oxygen to create ATP