Homeostasis 2

Multiple Choice

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

• static and dynamic

• positive and negative

• minor and major

• receptor and effector

Multiple Choice

If the calcium in your blood decreases below homeostasis levels, a gland in the brain will sense the decrease and send a chemical message to your bones. Your bones will release calcium into the blood, bringing blood calcium levels back up.

• Positive Feedback Response

• Negative Feedback Loop

• Osmoregulation

• Termoregulation

Multiple Choice

Which system sends electrical messages that helps control the body's responses to internal and external changes?

• nervous

• integumentary

• reproductive

• endocrine

Multiple Choice

This is the term used to describe a body part that provides the response needed to influence a change.

• control center

• effector

• sensor

• set point

Multiple Choice

It transmits signals to the control center when it detects a change.

• control center

• effector

• response

• sensor

Multiple Choice

What is an example of a positive feedback mechanism?

Multiple Choice

What is the stimulus in the model above?

• body temperature

• increase in body temperature

• decrease in body temperature

• blood vessels dilating

Multiple Choice

Which of the following statements about feedback loops is most accurate?

• Negative feedback loops amplify changes to the set point of a system.

• Positive feedback loops reverse changes to the set point of a system.

• Negative feedback loops maintain changes to the set point of a system.

• Positive feedback loops amplify changes to the set point of a system.

Multiple Choice

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

• Negative feedback