Cell membranes
How many layers in a cell membrane?
2
Hydrophobic
How do + and - charges interact?
Potassium chloride
How do neurons receive signals?
Through receptors
Charged
Water
Hydrophilic
When you rub a balloon on hair, what happens?
Charge is transferred
Which ion crosses the plastic wrap to make a battery?
K+
This is the connection between two neurons
Can starch cross the membrane? Why or why not?
No, because it is too big
Vinegar
Hydrophilic
What is electrical current (ток) ?
Movement of charge
Which ion does not cross the plastic wrap to make the battery?
Cl-
When this channel opens, the neuron’s membrane potential goes DOWN
Voltage-gated potassium channel
Can oxygen cross the membrane? Why or why not?
Yes because it is small and neutral
Soap
Amphipathic
Give an example of a conductor and an insulator
What stores electrical potential energy in a battery?
Separation of charges
When this channel opens, a neuron’s membrane potential goes UP
Can salt cross the membrane?
No because salt will dissolve into charged ions in water. Charged ions cannot cross.
Phospholipid
Amphipathic
How can we discharged a charged object?
Connect it to the ground (grounding it)
Blocking which channel will prevent neurons from sending electrical signals?
Sodium channels