I NEED THIS ANSWERED IN 15MINS. MORE MONEY WILL BE ADDED IF SO.

Question 1 (1 point)

When substances move according to their concentration, this action is best described as:

Question 1 options:

a) 

Moving from areas of high concentration to areas of low concentration

b) 

Moving from areas of low concentration to high concentration

c) 

Moving from areas with positive charges to areas with negative charges

d) 

Moving from areas with negative charges to areas with positive charges

SaveQuestion 2 (1 point)

____________ insulates neurons, increases the speed of an action potential, and in the CNS, is made by ___________.

Question 2 options:

a) 

Oligodendrocytes; myelin

b) 

Myelin; Schwann cells

c) 

Myelin; oligodendrocytes

d) 

Schwann cells; myelin

SaveQuestion 3 (1 point)

An afferent neuron is most likely a _________ that sends information to the brain.

Question 3 options:

a) 

Motor neuron

b) 

Interneuron

c) 

Purkinje cell

d) 

Sensory neuron

SaveQuestion 4 (1 point)

This part of the neuron is called the lipid bilayer and is characterized as being ‘semi-permeable’:

Question 4 options:

a) 

Vesicle

b) 

Cell membrane

c) 

Mitochondria

d) 

Golgi apparatus

SaveQuestion 5 (1 point)

_______ are cells of the nervous system that have a role in support functions, such as immunity, nutrition, and neurogenesis.

Question 5 options:

a) 

Glia

b) 

Motor neurons

c) 

Autonomic nervous system

d) 

Neurons

SaveQuestion 6 (1 point)

_____________ occurs immediately after the axon was depolarized and limits the number of action potentials that can occur because the Na+ channels are either inactivated or less sensitive to stimulation.

Question 6 options:

a) 

Saltatory conduction

b) 

Refractory period

c) 

Sodium-potassium limit

d) 

Presynaptic refractory limit

SaveQuestion 7 (1 point)

_________ means that the axonal membrane is more negative relative to its resting membrane potential.

Question 7 options:

a) 

Depolarization

b) 

Unipolar

c) 

Hyperpolarization

d) 

Antipolarization

SaveQuestion 8 (1 point)

________ means the axonal membrane is more positive compared to its resting membrane potential. 

Question 8 options:

a) 

Depolarization

b) 

Unipolar

c) 

Hyperpolarization

d) 

Antipolarization

SaveQuestion 9 (1 point)

Chemical communication between neurons is characterized by:

Question 9 options:

a) 

Depolarization of the axonal membrane by Na+ ions, in order to move the signal down the axon.

b) 

The release of neurotransmitters from the presynaptic terminal that then move across the synaptic cleft to bind to receptors on the postsynaptic cell.

c) 

The release of Ca2+ ions from the presynaptic terminal that then move across the synaptic cleft and cause release of neurotransmitters through the postsynaptic cell.

d) 

An influx of K+ into the axon that makes the axonal membrane more negative. 

SaveQuestion 10 (1 point)

The central nervous system includes the:

Question 10 options:

a) 

Brain

b) 

Spinal cord

c) 

Peripheral nerves

d) 

Both a and b.

SaveQuestion 11 (4 points)

Provide the divisions of the Autonomic Nervous System. Include in your answer what each division is known to do (4 points total). 

Question 11 options:

For each numbered area of the graph of the action potential, match what is occurring at that phase with the correct phase number. One choice will be used twice

Question 13 options:

1

2

3

4

5

Membrane potential is at resting potential; K+ at equilibrium—no net change in K+ movement; Na+ channels closed.1

2

3

4

5

Membrane reaches threshold and numerous voltage-gated Na+ channels are open and Na+ is rushing into the cell; voltage-gated K+ channels are closed. Since threshold is reached, an action potential is generated. 1

2

3

4

5

Membrane potential is at resting potential; K+ at equilibrium—no net change in K+ movement; Na+ channels closed.1

2

3

4

5

Few Na+ channels are open; cell becoming slightly more depolarized, but needs to reach threshold1

2

3

4

5

K+ rapidly moves out of the cell in order to bring the cell membrane back to its resting potential; Na+ channels are inactivated and cannot be reopened.

Provide the 4 lobes of the brain and include one behavior or physiological function for which each lobe is responsible.