1020 Final Flashcards
4 primary tissue types of the body
epithelial, connective, muscular, nervous
bone cells
osteocytes
outermost covering of the bone
periosteum
builds bone up
osteoblasts
take bone apart
osteoclasts
outside layer of bone
dense bone
inside layer of bone; bone marrow
medullary
top part of the bone; spongy bone
trabecular
cartilage cells
chondrocytes
ground substance of cartilage made from:
chondroitin
chondrocytes live inside spaces called
lacunae
white blood cells
leukocytes
red blood cells
erythrocytes
platelets
thrombocytes
RBC lasts about ____ days.
120
Types of white blood cells:
Neutrophils, leukocytes, monocytes, eosinophils, basophils
epithelial tissue that is one layer thick
simple
epithelial tissue that is several layers thick
stratified
flat epithelial cells
squamous
cube-shaped cells
cuboidal
cylinder-shaped cells
columnar
simple squamous epithelial tissue is located:
lining of lungs, capillary walls, and blood vessels
simple cuboidal located:
lining of some glands and kidney tubules; covering of ovaries
simple columnar location:
lines airways of respiratory tract and most of gastrointestinal tract
what kind of cells secrete mucous
goblet
glands with a duct; ex. sweat, sebaceous, and salivary
exocrine
glands with no ducts that move hormones through the blood
endocrine
stratified squamous location:
outer layer of skin
parts of a neuron
cell body, axon, and dendrites
parts of CNS
brain and spinal cords
parts of PNS
sensory and motor neurons
receptors that detect stimuli
sensory receptors
respond to stimuli
motor effectors
3 types of neurons
sensory neurons, motor neurons, and interneurons
carry impulses TO the CNS
afferent neurons
carry impulses FROM the CNS to effectors
efferent neurons
resting potential
-70mV
threshold potential
-55mV
at resting potential, the outside of the cell is slightly more ___________(negative/positive) than the inside
positive
what kind of ion channel resets a cell to have action potential?
voltage-gated ion channel
peak of depolarization
+30mV
period when the membrane charge goes below -70mV
refractory period
nerve ________(can/cannot) fire again during refractory period
cannot