Chapter 6 Test

Question or Hint Answer or Word

What does it mean to take in oxygen and release carbon dioxide? respiration (wrong answers: circulation, veins, herbivore, nerve net)
What does it mean to flow in a circular pattern? circulate (wrong answers: blood vessel, heart, carnivore, omnivore)
In what system does blood have DIRECT contact with cells? open circulatory system (wrong answers: closed circulatory system, veins, herbivore, omnivore)
In what system does blood stay in vessels at all times? closed circulatory system (wrong answers: open circulatory system, arteries, carnivore, herbivore)
What is it called when an animal gets rid of substances or wastes that are not needed? excrete (wrong answers: annelids, circulation, secrete, omnivore)
What is the chemical signal that glands produce? hormone (wrong answers: nerve net, protein, intestine, gizzard)
What is the message that travels along nerve cells? impulse (wrong answers: blood vessel, cell, esophagus, mouth)