The atria begin to contract following depolarization of the atria and pump blood into the ventricles a. True
b. False

If a set of instructions that determines all of the charactersitics of an organism is comparedto a book, and a chromosme is compared to chaper in the book, then what might be compared to a paragraph in the book?

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen