front 1 Approximately how many years ago did animals begin breathing oxygen?
| back 1 380 million |
front 2 Before oxygen was present in the air, how did organisms obtain oxygen from the water? they drank it | back 2 diffusion |
front 3 ![]() Which system is this as indicated by the arrow? digestive respiratory circulatory immune | back 3 circulatory |
front 4 ![]() These oxygen molecules have to cross ______ layers of cell membrane to enter the bloodstream. 3 | back 4 4 |
front 5 ![]() Do lungs have any contractible muscle tissue? maybe no yes I don't know | back 5 no |
front 6 ![]() This structure separates your _________________ from your abdomen. large intestine | back 6 thorax |
front 7 ![]() The conducting zone aspect of respiration begins with your ___________________ . lungs | back 7 nose |
front 8 Your nose and __________________ warms and moistens incoming air. lungs | back 8 sinuses |
front 9 ![]() What is the name of the structure as indicated here by the arrow? epiglottis | back 9 epiglottis |
front 10 ![]() What is the name given to these structures as indicated by the small and large arrows? Alveolar sacs | back 10 Alveolar ducts |
front 11 ![]() What is the name of these portions of this molecule of ATP?
Tri-Phosphates | back 11 Tri-Phosphates |
front 12 ![]() Where is most ATP produced? golgi bodies | back 12 mitochondria |
front 13 ![]() What is the name of this structure as indicated by the arrow? Granules Ribosome Cristae Matrix | back 13 matrix |
front 14 Where does Glycolysis occur in the cell? cytoplasm | back 14 cytoplasm |
front 15 ![]() What is occurring here as being shown by the arrow? NADH is carrying a hydrogen to the mitochondria | back 15 NADH is carrying a hydrogen to the mitochondria |
front 16 ![]() These two Pyruvate molecules can then break down further in which of these ways? aerobic | back 16 both of these |
front 17 The Krebs Cycle occurs in the ___________________ and generates ____________________ as waste. cytoplasm, carbon dioxide mitochondrial matrix, carbon dioxide mitochondrial matrix, water cytoplasm, water | back 17 mitochondrial matrix, carbon dioxide |
front 18 ![]() Are these Hydrogen ions delivered by the same type of molecule? yes no they aren't delivered by a molecule none of these | back 18 no |
front 19 ![]() How is this Hydrogen ion passing across this membrane? ATP Diffusion Active transport Osmosis | back 19 diffusion |
front 20 ![]() How many of these ATPs are created at the end of this cycle? 30 36 34 32 | back 20 34 |