Class notes
Human physiology
- Course
- BIOS251
- Institution
- Walden University
Lecture notes of 14 pages for the course BIOS251 at Walden University (BIOS251)
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BIOS251 NOTES FOR A GURANTEED A+ #SUCCEEDING IS YOURPORTION MY LOYAL BUYER.
Proryotic and Eukaryotic both have the cell membrane (also called the plasma
membrane), ribosomes, cytoplasm, and DNA
Cells are the basic building block of life.
Our bodies are made of approximately three trillion cells
Bacteria are prokaryotic organisms. Prokaryotes are always unicellular
Cytoskeleton is what gives our cells shape and protection
Human Cells are made up of cytoskeleton it is what gives our cells shape and
protection.
The plasma (cell) membrane is the outer layer of cells made of the phospholipid
bilayer embedded with protein channels.
Cytoplasm is the dense liquid that fills a cell and stores carbohydrates, organelles,
and enzymes. This is found between the nucleus and the cell membrane.
Cytosol is the liquid part of the cytoplasm.
The nucleus is the double-membraned enclosed organelle that stores your DNA.
Gamete (sex) cells the sperm in the male and
The ovum (egg) in the female
Somatic (body) cells Examples: red blood cells (RBC), epithelial cells, nerve cells,
bone cells, muscle cells.
, Where does protein synthesis take place? The ribosome is the site of protein
synthesis.
Karyon, Pro, Eu means "Karyon" means "nucleus."
"Pro" means "before."
"Eu" means "after."
Facilitated diffusion is a type of passive transport of large molecules (glucose, for
example) requiring the aid of a carrier protein True
Facilitated diffusion requires a carrier protein to move a large substance (glucose,
for example) down its concentration gradient across the plasma membrane.
Facilitated diffusion is a passive process; no cellular energy is required
Where are peripheral membrane proteins located? Peripheral proteins: are attached
to one layer (to the inner layer or outer layer of the membrane) of the membrane
(penetrate the membrane only partially).
Integral proteins (transmembrane proteins): are attached permanently to the
membrane and span the bilayer. "Trans" means across
plasma membrane barrier protecting the cell's inner content from the extracellular
environment
The plasma membrane anchors the cytoskeleton and shapes the cell, as well as
allowing for cellular communication
phospholipid bilayer that regulates the transport of molecules into and out of the
cell passive transport: Diffusion, Facilitated Diffusion
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