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Sorry for the double post, but just had to say: this is my favorite thing ever. (Okay not really, but it is really cool and pretty useful for visualization!) Whoa, that is cool! BTW, chia, how did you guys handle the "size range" question on the crystal lake central test? I feel like it's...

Hmm.. the terminal bronchioles signify the end of the conducting zone, while the respiratory zone start with respiratory bronchioles. Somewhere during the transition between bronchioles and the alveoli, there is no more smooth muscle. Since the respiratory zone is the start of gas exchange, I think ...

What is the first structure of the respiratory tree to lack smooth muscle?
I know the upper bronchioles have smooth muscle, but what about the terminary bronchioles? Or respiratory bronchioles?

Sorry for the double post, but just had to say: this is my favorite thing ever. (Okay not really, but it is really cool and pretty useful for visualization!) Whoa, that is cool! BTW, chia, how did you guys handle the "size range" question on the crystal lake central test? I feel like it's...

I was wondering, is this event harder than what is learned in AP Bio? Or is it just that stuff, but more in depth? Personally I found the AP Biology material to be a good starting point, especially the section on parasitic worms. However, the material for Microbes greatly expands on the AP Bio curr...

Here's another question for you guys...

What would be the effect of viral pneumonia on the lung capacities? Such as tidal volume, expiratory reserve volume, and total lung capacity?

I was reading stuff about the oxygen-hemoglobin dissociation curve, and the wording is on a slightly higher level than I can understand. Can anybody explain it in plain English? The curve is a graphic representation of the factors that affect O2's affinity for hemoglobin. The most important factor ...

After bending the toober excessively, I have found that our model has become wobbly. What do you guys do to keep the model stable?

I have a question that recently came up that left me debating with my partner: Where does fat digestion begin? I have read many textbooks that say the mouth produces lingual lipase, which would imply that fat digestion begins in the mouth. However, in class we were taught that fats are digested in t...

How do you guys study for microbe picture/microscope slide ID'ing?
It seems like the questions can range from really generic to really specific in the hierarchy of classification.