Class Notes (1,034,978)
US (406,411)
GVSU (484)
BMS (82)
Lecture 5

BMS 212 Lecture Notes - Lecture 5: Cytokinesis, Phagocytosis, Tubulin

6 pages105 viewsFall 2016

Department
Biomedical Sciences
Course Code
BMS 212
Professor
Aaron Baxter
Lecture
5

This preview shows pages 1-2. to view the full 6 pages of the document.
Eukaryotic Cell Structure
I. External Eukaryotic Structures
A. Glycocalyx
a. Structure
- Usually more like a slime layer
- Anchored to the cell membrane
- Not present in eukaryotes that have cell walls
b. Functions
- Protection
- Water retention
- Adherence
- Cell-to-cell recognition
- Communication
- Strengthens cell surfaces
B. Cell Wall
a. General
- Located in fungi, algae, and a few protozoa
- Functions in strength and maintaining the cell shape
b. Structure
- Contains cellulose, pectin, chitin, mannans, and minerals
- Which structural components are present and concentrations of them
depend on the organism
C. Cell membrane
a. Structure
- Sterols (i.e. cholesterol) strengthen the membrane but maintain fluidity
- Membrane rafts localize functions
b. Function
- Protein sorting
- Signaling
- Movement
- Exocytosis and endocytosis
- *No group translocation*
find more resources at oneclass.com
find more resources at oneclass.com
You're Reading a Preview

Unlock to view full version

Only half of the first page are available for preview. Some parts have been intentionally blurred.

II. Internal membrane bound structures
A. Flagella and Cilia
a. Structure
- Membrane bound
- Microtubules in a 9+2 arrangement
run the length
- Dynein arms interconnect the
microtubules
- Basal body (kinetosome) has a 9+0
arrangement
*9+2 is 9 pairs of microtubules
surrounding a pair in the middle*
*9+0 is 9 trios of microtubules with
nothing at their center*
b. Movement
- Whip-like motion
- Some push and pull
- No runs and tumbles
c. Differences
i. Flagella
- Located on the poles of the cells
- Long and flexible
ii. Cilia
- Located all over the cell surface
- Shorter and stiffer
- *located on protozoa and animal cells, not on prokaryotes*
B. Nucleus
a. Structure
i. Surface
1. Nuclear envelope
- Two phospholipid bilayers
- Permeated by nuclear pores
- Outer membrane is continuous with the endoplasmic reticulum
2. Nuclear pores
- Go through the nuclear membrane
- Protein-lined channels
- Control the import and export of materials between the nucleus
and the rest of the cell
find more resources at oneclass.com
find more resources at oneclass.com
You're Reading a Preview

Unlock to view full version


Loved by over 2.2 million students

Over 90% improved by at least one letter grade.