Apatient has a rare genetic disorder that causes their heart to not "squeeze" well. this causes fluid to back up in the lungs, making it difficult for the patient to breath. doctors prescribe "water pills" which cause the patient to urinate extra fluid. which answer best summarizes the main body systems described in this example?
a. nervous, muscular, and skeletal systems
b. circulatory, respiratory, and excretory systems
c. circulatory, excretory, and integumentary systems

It's B, not C. I just got an 80 and I reviewed the test and C was wrong.

I’m guessing you’re more alert to yourself or your surroundings if you’re more concentrated

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic