Approximately how many years ago did animals begin breathing oxygen?
- 1 billion 380 million 280 million 4.5 billion
380 million
Before oxygen was present in the air, how did organisms obtain oxygen from the water?
they drank it
breathing via lungs
osmosis
diffusion
diffusion
Which system is this as indicated by the arrow?
digestive
respiratory
circulatory
immune
circulatory
These oxygen molecules have to cross ______ layers of cell membrane to enter the bloodstream.
3
5
2
4
4
Do lungs have any contractible muscle tissue?
maybe
no
yes
I don't know
no
This structure separates your _________________ from your abdomen.
large intestine
trachea
thorax
small intestine`
thorax
The conducting zone aspect of respiration begins with your ___________________ .
lungs
nose
head
diaphragm
nose
Your nose and __________________ warms and moistens incoming air.
lungs
sinuses
heart
gills
sinuses
What is the name of the structure as indicated here by the arrow?
epiglottis
esophagus
trachea
larynx
epiglottis
What is the name given to these structures as indicated by the small and large arrows?
Alveolar sacs
Lungs
Alveolar ducts
Brachiophiles
Alveolar ducts
What is the name of these portions of this molecule of ATP?
Tri-Phosphates
Di-Phosphates
Tri-Amine
Tri-Hydrogen
Tri-Phosphates
Where is most ATP produced?
golgi bodies
endoplasmic reticulum
cytoplasm
mitochondria
mitochondria
What is the name of this structure as indicated by the arrow?
Granules
Ribosome
Cristae
Matrix
matrix
Where does Glycolysis occur in the cell?
cytoplasm
cell membrane
ribosome
mitochondria
cytoplasm
What is occurring here as being shown by the arrow?
NADH is carrying a hydrogen to the mitochondria
NADH is
carrying an oxygen to the mitochondria
NADH is carrying an ATP
to the mitochondria
None of these
NADH is carrying a hydrogen to the mitochondria
These two Pyruvate molecules can then break down further in which of these ways?
aerobic
both of these
anaerobic
neither of these
both of these
The Krebs Cycle occurs in the ___________________ and generates ____________________ as waste.
cytoplasm, carbon dioxide
mitochondrial matrix, carbon dioxide
mitochondrial matrix, water
cytoplasm, water
mitochondrial matrix, carbon dioxide
Are these Hydrogen ions delivered by the same type of molecule?
yes
no
they aren't delivered by a molecule
none of these
no
How is this Hydrogen ion passing across this membrane?
ATP
Diffusion
Active transport
Osmosis
diffusion
How many of these ATPs are created at the end of this cycle?
30
36
34
32
34