Chapter 2 pt.2

Question 1

What was powerful enough to make me extremely small electrical signals generated by the neuron visible

Answer 1

Electron amplifiers

Question 2

Edgar Adrian recorded electrical signals from single neurons using _______________, small shafts of hollow glass filled with a conductive salt solution that can pick up electrical signals at the electrode tip and conduct the signals back to a recording device

Answer 2

Microelectrodes

Question 3

What are the two types of electrodes

Answer 3

Recording electrode, and Reference electrode

Question 4

The inside of a neuron has a charge that is 70 MV more negative than the outside, the difference is called the ________ _______

Answer 4

Resting Potential

Question 5

When the neurons receptor is stimulated so that a nerve impulse is transmitted down the axon, the neuron is no longer at a resting potential, instead it is at a ________ potential that lasts about 1 millisecond

Answer 5

Action potential

Question 6

What is a neurotransmitter

Answer 6

A chemical that is released at the synapps that makes it possible for the signal to be transmitted across the gap that separates the end of an axon from the dendrite of another neuron

Question 7

Who was able to record electrical signals from single sensory neuron’s, and was able to coin all these terms?

Answer 7

Edgar Adrian

Question 8

Our main interest is not how atoms transmit signals, but hoe these signals contribute to the ________ of the ________.

Answer 8

Operation of the mind

Question 9

Edgar Adrian studied the relation between nerve firing and sensory experience by measuring what?

Answer 9

by measuring how the firing of a neuron from a receptor in the skin changed when he added pressure to the skin

Question 10

By applying more pressure to the skin, what happened to the rate of nerve firing?

Answer 10

that the “rate” of nerve firing (the number of action potentials that traveled down the axon per second) increased due to the pressure.

Question 11

Why did the rate of nerve firing increase with pressure?

Answer 11

Because the nerve impulses were pushed closer together, making the distance shorter

Question 12

What is the “Principle of neural representation?”

Answer 12

the idea that everything a person experiences is based on representations in the persons nervous system