class 1: organ systems, anatomy terminology, homeostasis Flashcards
(45 cards)
Anatomy
-“tomy”: Latin for cutting. It’s the structure of organisms, often dissection based
Physiology
“physio” - nature, “logy” - study of. How the body functions.
Pathophysiology
The physiology of disease
levels of organization in physiology
atomic, chemical/molecular, cellular, tissue, organ, system, organism
12 body systems in this class
integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, respiratory, lymphatic, immune, digestive, urinary, reproductive
homeostasis
The maintenance of internal constancy in the face of external variability. coined by Walter Cannon in 1932.
order of actors in negative feedback regulation
recepter - control center - effector
disease
sustained deviation from homeostasis
dynamic constancy
the fact that the body is not ever turned on or off - positive and negative e are both always running, even at homeostasis
intrinsic regulation
regulatory mechanism “built into” the organ it regulates (e.g. dilation and constriction of blood vessels)
extrinsic regulation
regulatory mechanism is outside the organ it regulates (e.g. nervous and endocrine systems regulate most organs)
superior/cranial
to the head, up
inferior/caudal
to the tail, down
anterior/ventral
to the front/belly
posterior/dorsal
to the back
medial
towards midline
lateral
away from midline
intermediate
in between
proximal
closer to the origin
distal
farther from the origin
superficial
towards surface
deep
away from surface
sagittal plane
divides left from right
transverse plane
divides superior from inferior