Excitable Tissues Flashcards
1
Q
Passive transport
A
Down an electrochemical gradient, from high to low
2
Q
Active transport
A
Up an electrochemical gradient, from low to high
3
Q
Describe cell membrane
A
Selectively permeable lipid bilayer with integral and peripheral proteins
4
Q
Types of protein transporters
A
Uniport ↓
Symport ↓↓
Antiport ↓↑
5
Q
Types of transport across cells
A
Transcellular (through the cell)
Paracellular (between two cells)
6
Q
Types of cell uptake
A
Endocytosis- uptake
Exocytosis- release
Phagocytosis- cell eating
Pinocytosis- cell drinking
7
Q
Types of ion channels
A
Voltage-gated
Extracellular ligand-gated
Intracellular ligand-gated
Stress activated
8
Q
Define ligand
A
Chemicals, either hormones or neurotransmitters
9
Q
Voltage-gated Na+ channel
A
Rest, activated or inactivated Key elements: Transmembrane pore Selectively filter Voltage sensor
