Excitable Cells

Question 1

Force generated by the separation of charge:

Answer 1

Voltage

Question 2

Voltage has the potential to move charge and is therefore called

Answer 2

Potential

Question 3

When charge is allowed to move it is called

Answer 3

Current

Question 4

Two types of change in membrane potential

Answer 4

Graded potentials and action potentials

Question 5

Ligand-gated channels are used mostly in neurons in ….

Answer 5

Dendrites and cell body, and in synaptic potentials

Question 6

________ is produced by marine dinoflagellates and is a danger to humans eating shellfish

Answer 6

Saxitoxin (STX)

Question 7

Saxitoxin blocks _____

Answer 7

Voltage-gated sodium channels

Question 8

_________ results in the excess reabsorption of Na+ and loss of K+ from renal tubule, causing severe high blood pressure

Answer 8

Liddle’s syndrome

Question 9

_______ or sudden adult death syndrome is associated with mutations of gene for Na+ channels in myocardial muscle cells

Answer 9

Brugada syndrome