PNS WI18-Neuron Flashcards Preview

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Flashcards in PNS WI18-Neuron Deck (26):
1

Referred to as the brain of the cell, the nucleus tells the cells what to do via?

Chromosomes

2

What is the purpose of pores in the phospholipid layer of the nucleus?

Communication

3

A membrane in the cell that is made of phospholipids, that provides lipid for other part of the cell.

Smooth endoplasmic reticulum

4

A membrane is the cell that is made of phospholipids, and is contains ribosomes.

Rough endoplasmic reticulum

5

What is the function of ribosomes?

Protein synthesis

6

The storage compartment of the cell, the Golgi receives proteins from the RER. Describe the path of the proteins to golgi and excretion.

Proteins are packaged in sent to golgi in vesicles.

They are either stored or used to form glycoproteins or lysosomes.

Then the are excreted in vesicles when needed

7

This organelle is a rod shaped, doubled membraned structure that is the site of energy production.

Mitochondria

8

Why is the inner membrane of the mitochondrion folded?

Increases surface area for more energy production

9

What are the three materials needed to make cytoskeleton?

Microtubules

Microfilaments

Microfibrils

10

What are the functions of the cytoskeleton?

Transport substances in cell or cell itself

Forms frame of cell

11

Processes of a neuron include the axons, and dendrites. Which of the two have nissl bodies?

Dendrite

12

Describe a neuropil

Neuropil describes everything else including the glia cells, and processes

13

Axons that are larger in diameter will be able to conduct action potentials (faster/slower)

Faster

14

What are the two rules of conduction in an axon?

1. Larger the diameter, faster the conduction

2. More the myelin, Faster the conduction

15

Definition: Anything that causes disruption.

Lesion

16

When a lesion occurs closer to the nerve,the muscle degenerates. What is the name of this degeneration?

Wallerian

17

When a lesion occurs, the nissl bodies become very active and the nucleus develops an envelope indicating that the neuron has become very active.What is the name of the process that causes the halo?

Chromatolysis

18

After chromatolysis what occurs next?

Regeneration.

19

What happens in the regeneration phase after a lesion to the neuron?

The nucleus sends out signals to the end of the neuron to send out growth cones. The growth cone reaches the muscle, reconnecting nerve to muscle.

20

Intracellular transport from cell body to terminal.

Anterograde

21

Intracellular transport from axon terminal to cell body.

Retrograde

22

T/F: Nitric oxide or smaller amines can be repackaged in the synaptic cleft.

True

23

Smaller neurotransmitters can be repackaged in the cleft, what happens to larger neurotransmitters?

Larger neurotransmitters must be repackaged in the cell body.

24

The ventricular zone of the neurotube contains what?

Pluripotent stem cells

25

The intermediate zone of the neurotube contains what?

Older cells from ventricular zone that will either become glia or neuron

26

The marginal zone of the neurotube contains what?

Either glia cells or neurons