CELLS AND TISSUE Flashcards
(44 cards)
SMALLEST UNIT OF LIFE
CELL
THIS IS THE SELECTIVE PERMEABLE BARRIER
PLASMA MEMBRANE
INTRACELLULAR FLUID PACKED WITH ORGANELLES
CYTOPLASM
ORGANELLES THAT CONTROLS CELLULAR ACTIVITIES
NUCLEUS
MOST ABUNDANT MATERIAL, JELLYLIKE SUBSTANCE COMPOSED OF PROTEINS AND POLYSACCHARIDES
EXTRACELLULAR MATRIX (ECM)
SUBSTANCE THAT AID IN DIGESTION (GASTRIC FLUIDS) OR ACTS AS LUBRICANT (SALIVA)
CELLULAR SECRETIONS
FORMS OF THE FABRIC OF THE MEMBRANE (PHOSPHOLIPID + CHOLESTEROL)
MEMBRANE LIPIDS
Refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes, which are lipid bilayers that contain proteins embedded in them.
TRANSPORT PROTEINS
what are the three passive membrane transport
simple diffusion, facilitated diffusion, osmosis
helps in stabilizing the internal environment of the organism by balancing the levels of water and intracellular fluids.
osmosis
the passive movement of substances, such as biological molecules or ions, across a plasma membrane by means of a transport protein located in the plasma membrane
facilitated diffusion
describes the amount of solute in a solution.
tonicity
To maintain the cell structure and prevent the cell lysis more dilute than cells, cells pump up or lyse
hypotonic
signals from the nervous system
neurotransmitter
signals from the endocrine system
hormones
chemicals that act locally and are rapidly destroyed
paracrines
viscous, semi-transparent fluid in which other cytoplasmic elements are suspended
CYTOSOL
metabolic machinery of the cell that synthesize proteins, generate ATP
ORGANELLE
chemical substances like stored nutrients, lipid droplets and pigments
INCLUSIONS
Powerplants of the cell, providing ATP supply
Lozenge-shaped organelles that contains its own DNA, RNA, ribosomes and able to reproduce themselves
mitochondria
Sites of protein synthesis
Small-dark staining granules composed of proteins and RNA
ribosomes
Extensive system of interconnected tubes and parallel sacs
endoplasmic reticulum
studded with ribosomes that manufacture all proteins secreted from cells; manufacture of integral proteins and phospholipids that fo part of all cellular membranes
rough er
contains integral proteins called enzymes that catalyze reactions
smooth ER