MEDN2001

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Define “specialisation” as it relates to cell physiology.
Specialisation is the differentiation of a cell from a stem cell to do a particular function. A cell can be specialised for a specific function by structural features.
1 of 5
Describe the structure of the mammalian plasmalemma to its function as a semi-permeable barrier
The plasma membrane is comprised of phospholipids which have polar head groups (hydrophilic) and fatty acid chains which are hydrophobic. Glycosylations on proteins are found on the outside of the cell and interact with the extracellular matrix. With
2 of 5
Describe the various functions of integral and peripheral membrane proteins (receptors, adhesion, pores, channels, enzymes)
Integral membrane proteins can function as receptors, help adhere the cell to adjacent cells, act as pore or channels to allow passage of mostly hydrophilic substances unable to pass the lipid bilayer, and have catalytic activity. Integral membrane p
3 of 5
Explain the molecular basis of the resting membrane potential
Resting membrane potential is determined by concentration gradients of ions across the membrane. The membrane is polarised due to the potential difference across the cell membrane. All cells have a charge difference in the net charge from the inside
4 of 5
Explain what is meant by excitable cell and the phenomenon of membrane depolarisation
The membrane potential becomes
5 of 5

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Card 2

Front

Describe the structure of the mammalian plasmalemma to its function as a semi-permeable barrier

Back

The plasma membrane is comprised of phospholipids which have polar head groups (hydrophilic) and fatty acid chains which are hydrophobic. Glycosylations on proteins are found on the outside of the cell and interact with the extracellular matrix. With

Card 3

Front

Describe the various functions of integral and peripheral membrane proteins (receptors, adhesion, pores, channels, enzymes)

Back

Preview of the front of card 3

Card 4

Front

Explain the molecular basis of the resting membrane potential

Back

Preview of the front of card 4

Card 5

Front

Explain what is meant by excitable cell and the phenomenon of membrane depolarisation

Back

Preview of the front of card 5

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