In an effort to maintain homeostasis, the organ systems of the human body work to keep the body's internal water level constant. Which of the following statements describe how the human body responds when its internal water level drops too low? A. The skeletal system produces more circulating blood cells that insecure the body’s water intake

B. The excretory system signals the kidneys to retain more water and produce more concentrated urine to decrease water loss.

C. The nervous system signals the muscles to constrict , holding more water in the digestive track and decreasing water loss .

D. The excretory system signals the kidneys to release more water into the bladder to increase water loss .

B. The excretory system signals the kidneys to retain more water and produce more concentrated urine to decrease water loss

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