Which are examples of negative feedback? Select three options.

a child whose thymus gland is building an immune system that gets stronger each day
when someone’s adrenal gland reacts to a scary movie by secreting hormones that make the heart beat quickly
when someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently
when someone’s pancreas hormone increases every time they eat, but decreases when they aren’t eating
when a person takes calcium supplements so a gland will stop secreting a hormone that pulls calcium from the bones

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