Cell Biology Notes for Test 1

Cell Biology Notes for Test 1 - Lecture 1 Eukaryotic Cells...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture 1 Eukaryotic Cells Smallest functional unit First noticed in mid 1600s- Royal Society of London- Robert Hook- instru m e nt curator- Had d ecent microscopes (glass m a gnifies)- Looked at thin slices of cork: co mp art m ents of cork were called cellulae (little room)- Origin of cell mid 1800s- micron- mitochondria, nucleus, etc- Lavenhook- Saw little m e n in cells Did people com e from cells or spontan eous? Cell Theory 1) All organisms consist of 1 or more cells 2) Cell is the basic unit of structure 3) All cells arise from pre-existing cells (basic unit of reproduction) 1930s- Electron microscope (0.4n m)- Most cells are microm et ers- 1 microm eter = 1000 n m .001 microm et ers = 1 n m Surface are a to volum e ratio is why cells are s m all- Lower ratio = bigger object- We want a s m all object (large SA:vol)- Need oxygen and CO2 by diffusion- Less distance to transport to middle of cell- Neurons have very high SA:vol- Villae increase SA:vol What are cells made of? 6 elements: C H O N P S Certain combos are most prevalent: H2O (70%) H2O is universal solvent- Polar- allows it to hydrogen bond (with itself) (H is shared between 2 e-) OHO- Other charged molecules can bind (proteins, carbs)- Molecules arrange around H20- Charged molecules are hydrophilic- Uncharged molecules are hydrophobic- High mp and bp Carbon- Cell is carbon based unit- Silicon is almost as good as carbon (has 3 bonds instead of 4)- Carbon has no size limit (long chains)- Small (4 bonds) Other common combos: CH3, OH, COOH, NH2 Bioactive component of compounds Lecture 2 Small Organic Molecules...
View Full Document

This note was uploaded on 06/15/2011 for the course BY 330 taught by Professor Watts during the Spring '11 term at University of Alabama at Birmingham.

Page1 / 7

Cell Biology Notes for Test 1 - Lecture 1 Eukaryotic Cells...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online