In a phospholipid bilayer, fatty acid tails face each other within the bilayer and form a region that excludes water.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

i think its both a and b

answer; the code in musculoskeletal system subsection is associated with deep tissue possibly to the bone;

answer/// to address the needs of adults with mental illness and increase their ability to function;