respiratory, endocrine system Flashcards
what is the goal of a negative feedback loop?
to return back to a set point
what is the goal of a positive feedback loop?
to reach a specific target
what does crine mean?
secrete
what types of hormones are there?
steroid (fat soluble)
non-steroid (water soluble)
what is a hormone?
a chemical messenger that stimulates or inhibits a cell
it is secreted into the blood and maintains homeostasis
the cell a hormone affects is called
a target cell
how does a hormone cause an effect?
enters a cell to bind to a receptor, once is binds it can cause an effect to either increase or decrease a function
what organs work together to regulate the level of glucose in the blood
pancreas - make enzymes to help break down food
liver - stores energy
does the liver produce hormones?
NOOO
what do BETA cells secrete
insulin
what do ALPHA cells secrete
glucagon
when is insulin typically released?
after a meal
what happens to insulin once it is secreted?
if it binds to a target cell, it degrades
the leftover gets destroyed by the kidney and liver
which 2 cellular adaptations are at work in the tissue for the body to accommodate increased lipids
hyperplasia- cells multiplying
hypertrophy- cells getting bigger
what are the two types of adipose tissue?
subcutaneous fat- under skin, all over the body
visceral - torso and abdominal fat stored around organs