The bell rings at the end of class and you jump up to head for the door. When you stand up, you feel light-headed. What happens in your body to keep you from continuing to feel light-headed? List any body system that might be suppressed. Explain why.
Is this an example of positive feedback or negative feedback? Explain why.

"your temperature analysis reveals a pattern with coldest temperatures located to the portion of the map."

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.

Both destructive and constructive, the natural event seen here, is important in destroying and creating landforms on earth. what is this event called? a) deposition b) flooding c) landslide d) sedimentation