Quiz 1 - Homeostasis and Directional Flashcards
What is an atom
particle of matter
smallest level of organization
what is a molecule
links of atoms that organize into various structures
organelles
metabolic units within a cell that perform a specific function, necessary for the life of cell
ex. mitochondria
what are cells
smallest living units that make up the body structure
what are tissues
specialized groups of cells with similar structures and functions
what are organs
structures of 2 or more tissue types that work together to carry out a specific function
ex. heart, stomach, kidney
organ system
a system of organs
ex. thoracic
homeostasis
internal balance
necessary for humans to survive
maintained by receptors, set points and effectors
body set points
98.6 °F
72 BPM
90 mg/dL
receptor
receives information that the environment is changing
control center
receives and processes information from the receptor
effector
responds to the commands of control center by opposing or enhancing stimulus
stimulus
change in level
example of homeostasis
stimulus - gets hot
receptor - skin and brain
control center - hypothalamus compares to set point
effector - sweat and blood vessels dilate
sagittal plane
divides the left and right sides
frontal or coronal plane
divides the front and back
transverse plane
divides the top and bottom
what is included in the
cranial body cavity
brain
what is included in the
vertebral body cavity
spinal cord
what is included in the
thoracic body cavity
heart
lungs
esophagus
trachea
what is included in the
abdominal cavity
small intestine
large intestine
liver
spleen
gallbladder
what is included in the
pelvic cavity
internal reproduction
urinary bladder
some of large intestine
what are the body cavities
spaces in the body that contain, protect, separate, and support internal organs
