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A&P Chapter 3

Tri - Rivers School of Practical Nursing

Diffusion Movement of molecules from an area of greater concentration to lesser concentration Example: exchange of O2 and CO2 in body
Mitosis One cell - diploid chromosomes divide into 2 identical cells Essential for growth and tissue repair
lysosomes Digestive Enzymes
Order of mitosis in order Interphase Prophase Metaphase Anaphase Telophase
Mitochondria Powerhouse of cell, main function is ATP, makes it's own DNA
Cilia Sweep things in a particular direction
Endocytosis Transports into cell
DNA rungs & pairings A to T G to C
Phagocytosis Cell Eating Example: WBC's
Cytokinesis Cytoplasm divides - 2 cells
Microvilli Small folds in cell membrane to increase surface area
Golgi Apparatus Carbohydrates, Packaging
Mitosis Phase: Prophase Condensing DNA in chromosomes
DNA triplet is A-T-C what is the corresponding mRNA triplet? DNA - A,T,C mRNA - U,A,G
Centrioles used in cell division
Pinocytosis Cell Drinking
Meosis Haploid number of cells - forms egg and sperm cells
When a hypertonic fluid is administered, how is the solute distributed intally? pulls H2O from cells & other tissues
What are two solutes? Na, K
Hypertonic Solution concentration is higher than in cells, cells may die
When a hypertonic fluid is administered what could happen to the cells in the body? cells may shrivel & die
When a hypertonic fluid is administered, where does the water move to & from? capillaries take from tissues and other cells
Isotonic Solution Concentration is equal to the cells, no fluid movement, no damage to cells
Hypotonic Solution Concentration less than cells, cells may burst
Mitosis Phase: Interphase DNA replication, growth phase, doubles everything
Facilitated Diffusion Carrier & transporter enzymes move molecules across cell membranes
RNA rungs and pairings A to U T to A C to G
Osmosis movement of H2O through a semi - permeable membrane from a region of greater concentration of H2O to lesser of H2O
mRNA messenger RNA - copy form multiplying
Mitosis Phase: Metaphase Chromosomes line up on equator of cells
Haploid Half - 23 Chromosomes
Primary Cilium Single hair - antenna for cell
Mitosis Phase: Telophase Reforms nuclear membrane
tRNA brings amino acids from cytoplasm to the matching triplet on mRNA
Ribosomes act as protein factories
Mitosis Phase: Anaphase chromosomes split and go to each side of cell
Exocytosis Transport of materials out of the cell in a vesicle
Filtration (passive transport) Movement of H2O & dissolved substances from higher to lower pressure, does not require ATP
Active Transport Requires ATP, movement of molecules from lesser to greater area of concentration
Flagella Have small, thin, tain - such as sperm
Codon The code for a single amino acid consists of 3 bases on the DNA
Diploid 46 Chromosomes
Created by: aepnkbird



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