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biology week 6 notes

by: Gabby Scheck

biology week 6 notes bio 1305

Marketplace > Baylor University > Biology > bio 1305 > biology week 6 notes
Gabby Scheck
Baylor University

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these are week six notes for biology.
mod concepts of bioscience
Walter Holmes
Class Notes
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This 3 page Class Notes was uploaded by Gabby Scheck on Tuesday October 4, 2016. The Class Notes belongs to bio 1305 at Baylor University taught by Walter Holmes in Fall 2016. Since its upload, it has received 14 views. For similar materials see mod concepts of bioscience in Biology at Baylor University.

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Date Created: 10/04/16
Holmes 1305 Week 6 notes Chapter 7  Membranes are: o not barriers o selective o process information o energy transformation o organize reactions  membranes are dynamic  membrane components o phospholipids o oligosaccharides o cholesterol o peripheral proteins  steroids are lipids and only found in animal cell membranes  plants do not have cholesterol  factors that control diffusion o temp o size o medium o concentration  osmosis o water movement through a semipermeable membrane o hypertonic- >solute, <solvent  shrivel RBC and cause plasmolysis o hypotonic- <solute, >solvent  swell and burst RBC, turgid cells  comparison b/w solute and solvent amounts  transport o Passive- no extra energy required  Protein channel  Aquaporin  Gated channel o Active- requires extra energy (ATP)  Proton pump  Sodium potassium pump  Cotranspotration- two things transported (h+ and sucrose)  Primary active transport- Ex. NaK pump  2 ndmessenger- signal transduction pathway- gets signal through cell without putting the hormone in the cell  cAMP – 2 ndmessenger method of bypassing the cell membrane o bulk transport  endocytosis –move in  phagocytosis- eat  pinocytosis-drinking  exocytosis- move out  receptor mediated endocytosis  cell replication and division o Fission- prokaryote o Mitosis- nuclear division o Meiosis- sex cell formation o The cell cycle consists of 3 phases  Interphase  Not a part of mitosis  G1- gap 1, growth  S – synthesis, growth and replication of DNA  Mitosis  prophase  metaphase  anaphase  telophase  cytokinesis- cell division  cytokinesis is not always necessary; the can be multinucleated  cyclosis- cytoplasmic streaming o structure of nucleus  karolymph (sap)  chromatin  nucleolus o chromosome structure  chromosome number  chromatid  arm (p+q)  centromere  landmark bond  telomere o winding of DNA (reference above picture)


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