Chapter 1 - Intro to the Human Body Flashcards
Anatomy
study of structures and relationships
Physiology
study of functions of structures
6 basic life processes
metabolism, responsiveness, movement, growth, differentiation, reproduction
Metabolism
sum of all chemical reactions that occur in the body
Responsiveness
ability to sense changes in the environment and respond to them
Growth
increase in size (number of cells vs. size of cells)
Hypertrophy
increase in size of cells, after puberty (opposite of atrophy)
Hyperplasia
increase in number of cells, before puberty
Differentiation
change in cell from unspecialized to a specialized state
Reproduction
formation of new cells for growth, repair or replacement or production of a new individual
6 levels of structural organization
chemical, cellular, tissue, organ, system, organism
Homeostasis
condition in which the body’s internal environment remains relatively constant within physiological limits
Interstitial fluid
bathes cell, internal environment
Receptor
body structure that monitors changes in a controlled condition and sends input to a control center
Control center
sets range of values within which a controlled condition should be maintained, evaluates input/generates output
Effector
body structure that receives output from control center and produces a response that changes a controlled condition
Negative feedback systems
reverses a change in a controlled condition, reduces/eliminates a stimulus, most mechanisms operate in this manner
Positive feedback systems
strengthens/reinforces a change in one of the body’s controlled conditions (ex. oxytocin released during childbirth)
Superior
upper part of the body, towards the head
Inferior
lower part of the body, away from the head
Anterior
front of the body
Posterior
back of the body
Proximal
near the attachment of the extremity
Distal
further from the attachment of the extremity
Superficial
closer to the surface
Deep
away from the surface
Ipsilateral
same side
Contralateral
opposite side
Ventral
front side
Dorsal
back side
Prone
lying face down
Supine
lying on back
Sagittal
divide into left and right side
Midsagittal
equal left and right sides
Parasagittal
unequal left and right sides
Frontal (coronal)
divide into front and back
Transverse (horizontal)
splitting into top and bottom
Body cavities
spaces within the body that protect, separate, and support internal organs
Mediastinum
contains everything in thoracic cavity except lungs
Viscera
all organs in a cavity, whole rather than individual organs
Serous membrane
parietal and visceral layers (ex. pleura, pericardium, peritoneum)