Chapter 3: Plasma Membrane Flashcards
Which of the following about the plasma membrane is not true?
A. It is made of lipid molecules
B. It protects the cell’s cytoplasm.
C. It contains proteins.
D. It contains most of a cell’s DNA
D. It contains most of a cell’s DNA
Cell adhesion molecules (CAMs) are of 2 parts namely:
Integrins
Cadherins
Biology glue consists of
- CAMs : Cell Adhesion Matrix
- ECM: Extracellular Matrix
- Junctions.
Lack of collagen is called
Scurvy
A Symptom of scurvy is
Bleeding of the gum
What are the cable-like proteins that are fibrous too called?
Collagen
Extracellular matrix (ECM) is made up of 3 insoluble proteins namely?
- Collagen
- Elastin
- Fibronectin
Which part of ECM can stretch and coil back and is also heavily involved in the makeup of the lungs?
Elastin
Lack of Elastin causes_________
Non-functioning of the lung or COPD
which part of ECM holds cells properly and in place?
Fibronectin
Lack of Fibronectins
They are not produced in cancer cells, which is why cancer cells are found randomly in different parts of the body.
what are the 3 kinds of Junctions?
- Desmosomes
- Tight junctions
- Gap junctions
which junctions act like “spot rivets” and are strong enough to stretch but not break apart?
Desmosomes
A good example of Desmosomes is________________
Skin. and heart, uterine tissues
which junctions firmly bind adjacent cells together to prevent undesirable leaks within the epithelial tissues?
Tight junctions/Occluding junction
Great example of as tight junction is found___________
Blood-brain barrier (BBB), also kidney and the lumen of intestines.
which junctions form small connecting tunnels known as connexons and allow the flow of ions and little molecules to pass.
Gap junctions.
They are also permeable.
Where can Gap junctions be found?
Abundant in Cardiac and Smooth muscles. found in all Internal organs.
(Digestive tract, respiratory tract, cardiac muscle, pancreas, ovaries male repro, liver).
3 types of vesicular transport?
- Phagocytes
- Pinocytes
- Receptor mediated (NPR)
