Homeostasis

Which body system controls the body to maintain homeostasis?

• excretory

• nervous

• circulatory

• skeletal

When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.

• Positive Feedback Response
• Negative Feedback Loop 

The tendency of an organism to maintain a balanced state in order to stay healthy.

• Stimuli
• Response
• Tropism
• Homestasis

Rapid growth during puberty causes your body to release more and more growth hormones. As you grow, more and more growth hormones are released until puberty is reached, and then the hormones stop.

• Positive Feedback Response
• Negative Feedback Loop 

What describes a lack of water in the blood?

• Dehydration
• Rehydration
• Hydration
• Concentrated

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

Most bacteria that cause sickness in humans grow best at 98.6^oF. Sometimes a fever is the body's response to the bacteria. What is the reason for developing a fever?

• To lower the temperature of the body to kill the bacteria
• The increase the temperature of the body to kill the bacteria
• To allow the bacteria to take over
• To make you feel miserable

Which of the following animals has a body temperature that doesn't change depending on the weather outside?

• 
• 
• 
• 

Positive feedback is when the change caused by the stimulus is

• decreased
• non existant
• increased
• changes constantly

Which diagram represents an organ?

• #1
• #2
• #3
• #4