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cells, tissues, membranes
vocab
52
Medical
Undergraduate 1
06/06/2011

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Term
nucleus
Definition
center structure of cell enclosed in membrane which is essential to cellular functions such as reproduction and protein synthesis
Term
cell
Definition
smallest structural unit of living matter capable of functioning independently
Term
cell membrane
Definition
surface layer of cytoplasm of cell
Term
tissue
Definition
group of similar cells arranged with intercellular substance between them specialized to perform a particular function
Term
cytology
Definition
sutdy of structure, function, multiplication and pathology of cells
Term
protoplasm
Definition
living matter in all cells which is an organized complex or organic and inorganic substances which are too small for resolution with ordinary light microscope
Term
semi-permeable membrane
Definition
membrane which allows some molecules to pass through but not others
Term
vacuole
Definition
small cavity or space in cell protoplasm containing air or fluid
Term
electrolytes
Definition
substances such as acids, bases and salts which n solution conduct an electric current
Term
homeostasis
Definition
relatively stable state of equilibrium
Term
chromosomes
Definition
strands of DNA baring eye genes which carry hereditary characteristics
Term
pinocytosis
Definition
process of engulfing a liquid particle by forming a pocket with cell membrane
Term
osmosis
Definition
solvent molecules pass through a semi-permeable membrane to equalize concentration on each side
Term
diffusion
Definition
particles move to equalize concentration throughout
Term
phagocytosis
Definition
process of engulfing a solid particle by forming a packet with cell membrane
Term
filtration
Definition
particles move through filter or membrane that prevents passage of certain molecules
Term
nerve tissue
Definition
conducts impulses throughout body
Term
muscle tissue
Definition
moves body by contraction and relation of pairs
Term
connective tissue
Definition
protects, supports, transports, and binds body together
Term
epithelial tissue
Definition
acts as protective barrier from heat, cold, water loss, and bacterial invasion; acts in secretion and excretion
Term
anabolism
Definition
the constructive part of metabolism involving molecular synthesis
Term
protein
Definition
second most abundant compound in animal protoplasm that forms the structural framework of protoplasm
Term
nucleic acids
Definition
control the growth and reproduction of the cells
Term
cytoplasm
Definition
all the protoplasm not contained in the nucleus
Term
cell nucleus
cell membrane
cytoplasm
organelles
specialized structures
Definition
major parts of a cell
Term
characteristics of the parts of a cell
Definition
cell nucleus
Term
golgi apparatus
Definition
1.appear like small sacs stacked on top of each other located near the nucleus
2.synthesize carbohydrates, combine them with protein, and package the produce-"glycopackaging plant"
Term
functions of a cell
Definition
metabolize nutrients
Term
active transport
Definition
requires energy from the cell or wraps itself around a foreign particle
Term
centrosomes
Definition
located near the center of the cell
Term
microvilli
Definition
increase the surface area of the cell
Term
flagellum
Definition
single, hairlike projection from the surface of a cell which propels it
Term
isotonic solution
Definition
has the same concentration of dissolved particles as the solution with which it is compared
Term
hypertonic solution
Definition
condition in which a solution contains a greater concentration of dissolved particles than the solution with which it is compared
Term
mitosis
Definition
occurs in all human cells except reproductive cells and nerve tissue cells
Term
miosis
Definition
gives rise to four daughter cells which contain only half the number of chromosomes found in parent cell
Term
characteristic of epithelium
Definition
lines the body's serous cavities, blood and lymph vessels, and the respiratory, digestive, and urinary tracts
Term
classification of epithelium
Definition
simple - a single layer
stratified - multiple layers
Term
reticular (network)
Definition
function - filters injurious substances from blood and lymph by the reticular network; phagocytosis
Term
areolar (loose, ordinary)
Definition
location - between other tissues, organs, and superficial tissues
Term
skeletal muscle
Definition
striated, voluntary
Term
visceral
Definition
found in walls of hollow organs such as blood vessels, intestines, and uterus
Term
cartilage
Definition
location - nasal septum, covering surfaces of bones, larynx rings in trachea, and bronchi vertebral discs, external ear, eustachian tube
Term
hemopoietic
Definition
stimulates production of blood cells, location - lymphatic is lymph nodes, spleen, tonsils and thymus
Term
mucous membranes
Definition
line cavities or passages of the body that open to the exterior such as mouth, esophagus, digestive tract, respiratory passages, and GU tract
Term
Serous membranes
Definition
line closed cavities of the body such as thoracic cavity (pleura), abdominal cavity (peritoneum), and sac in which heart lies (pericardium)
Term
visceral layer covers the organs and parietal layer lines the cavity
Definition
serous membranes have two layers:
Term
synovial membranes
Definition
line joint, tendons, and bursae
Term
mucous membranes, serous membranes, synovial membranes, cardiac, cutaneous
Definition
main types of membranes:
Term
neuron
Definition
nerve cell
Term
cutaneous membranes
Definition
cover the body, have essentially two layers
Term
epidermis - outer layer
dermis - under layer
Definition
two layers of cutaneous membranes:
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