Homeostasis

The maintenance of an organism’s internal environment is called:

• compensating
• homeostasis
• balancing
• routine

If the environment gets cold, we will often shiver in order to:

• keep body temperature the same as the external temperature
• decrease body temperature
• increase body temperature
• regulate blood pressure

Homeostasis

• allows for a wildly fluctuating internal environment
• is impossible in vertebrates
• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
• is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation

Why is the sensation of thirst important to maintaining homeostasis?

• Water removed by the kidneys must be replaced

• Oxygen cannot diffuse into cells if a person is dehydrated

• Water molecules are needed to carry carbon dioxide waste to the kidneys

Why does pulse rate increase during exercise?

• Oxygen and carbon dioxide must be removed from the body ASAP

• Gas exchange must happen more quickly than when a person is at rest

• Oxygen must be moved to the lungs and carbon dioxide must be moved to cells more quickly

• Carbon dioxide must be moved to the kidneys to be excreted

The group of organisms that use the process of homeostasis includes

• mammals, only

• animals, only

• plants and animals

• all living things

If a person's blood cells shrivel (shrink) their blood is likely

• isotonic

• hypotonic

• hypertonic

Which of the following is most likely to cause a person's blood cells to burst?

• eating many salty foods

• eating many greasy foods

• drinking small amounts of water

• drinking very large amounts of water

The two types of feedback systems that help organisms maintain homeostasis are:

• positive and negative 
• receptor and effector
• static and dynamic
• minor and major

Maintaining body temperature is an example of a:

• negative feedback loop
• positive feedback loop