Nucleus. DNA cannot leave and is only found here. There is however a small amount found in the mitochondria.
Site of rRNA transcription and ribosome assembly.
Covered with ribosomes; all proteins not bound for the cytosol are made here.
Lipid synthesis and modification. NOT LIPID METABOLISM.
Cellular "post office;" organize, package, modify, excrete, etc.
Have their own DNA with variations to the nuclear genetic code passed through the maternal line only.
Place of lipid metabolism.
Theory suggests they evolved from aerobic prokaryotes in symbiosis with a eukaryotic cell.
The centrosome is an amorphous area of proteins and nucleating factors within which the centrioles are located. It organizes microtubules, flagella and cilia; it also plays a key role in cell division.
pH of 5
Digests cell parts
Fuses with phagocytotic vesicles
Participates in cell death (apoptosis)
Forms by budding off from the Golgi
Participates in lipid metabolism
A protein that is the main constituent of microtubules.
Microscopic network of filaments that give shape to cells.
Segregates chromosomes during cell division.
Actin and Myosin
Filaments in muscle that provide movement.
In humans, cilia are found exclusively in:
Respiratory System (lungs)
Nervous System (ependymal cells)
Reproductive System (fallopian tubes)
Whipping motion; microtubules made of tubulin.
Spinning/rotating motion; simple helices made of flagellin.
Tunnels allowing exchange
Strongest cellular junction but are not watertight barriers.
Types of membrane transport
Secondary Active Transport
Major component of all cell membranes that form lipid bilayers. Most phospholipids contain a diglyceride.
A protein molecule or protein assembly permanently attached in a biological membrane.
Transport substances such as molecules and ions across the membrane, within the cell, or can be involved in vesicular transport.
Organic chemical substance classified as a waxy steroid of fat. Essential structural component of mammalian cell membranes and is required to establish proper membrane permeability and fluidity.
Signal-receiving molecules embedded in the cell wall.
The release of cellular substances contained in cell vesicles by fusion of the vesicular membrane with the plasma membrane and release of the contents to the exterior of the cell.
Incorporation of substances into a cell by phagocytosis or pinocytosis.
Organ systems > Organs > Tissues > Cells
Communication characteristics of the endocrine system
Slow, general, long-lasting
Communication characteristics of the nervous system
Fast, specific, short-lived
Communication characteristics of the paracrine system
Local mediator hormones only
Having a pair of each type of chromosome, so that the basic chromosome number is doubled. 46 in humans.
The haploid number is the number of chromosomes in a gamete of an individual. This is distinct from the monoploid number (x), which is the number of unique chromosomes in a single complete set. Gametes (sperm, and ova) are haploid cells.
Two genetically identical, diploid daughter cells.
Four genetically distinct, haploid daughter cells.
Any biomolecule soluble in non-polar solvents and insoluble in polar solvents.
Fatty acid structure
Triacylglycerol (triglyceride) structure
Description of basic steroid structure
All are four-ringed structures.
Definition of amphipathic
An amphipathic substance is one that is polar at one end of the molecule (hydrophilic) and nonpolar (hydrophobic) at the other.