Notes

1.
a. Temperature and use of the same spirometer would be two variables that should be controlled
b. Differences between humans would contribute to uncertainty between the data because people do not have the same lungs, therefore there can be other factors that can limit or promote vital capacity.
c. The data can be arranged in increasing order and this could be used to see whether there is a correlation between the two bi-variable data. This data could be presented by using a graph and by using R^2 testing to show the strength of the correlation.
d. Exercise is an activity that promotes the heating up of the body and the usage of oxygen continuously. The continuous use of oxygen would lead to an oxygen debt where the body will intake less oxygen than required by the body. This oxygen debt leads to a shorter and faster breathing rate leading to a smaller tidal capacity. A smaller tidal capacity as suggested within this data would positively correlate to a smaller vital capacity.

2.
a. The mitochondria provide ATP energy within the synapse allowing for the transfer of neurotransmitters across synapses.
b. Vesicles transport neurotransmitters in bulk by active transport promoted by ATP generated by mitochondria
c. Neurotransmitters are electrical signals that transport action potential across a synapse
d. Re-uptake pump takes back the products of neurotransmitters that have been broken down by synaptic enzymes

3.
a. A = Serosa B. = Mucosa C = Sub-mucosa D = Smooth muscle
b. There is a lot of mitochondria within layers B as these are responsible for the movement of intestines. These are also responsible for the active absorption of molecules within the digestion process.