3/7/14 79

Question 1

the nervous system takes info from which 2 environments

Answer 1

the internal and external

Question 2

the nervous system can be broken down into how many parts and what are their names

Answer 2

2, The central nervous ,periferal nervous system

Question 3

what 2 things make up the central nervous system

Answer 3

The central nervous system=brain and spinal cord

Question 4

describe the periferal nervous system

Answer 4

periferal nervous system: the periferal nerves that are coming out of our body. it takes in info and emits a response . it takes in info and effects a response (motor out put)

Question 5

describe Neruosignaling

Answer 5

Neruosignaling: this is talking about one of the ways that info is transferred thorugout the body

Question 6

the nerve cells that are responsible for transmitting info are called?

Answer 6

neoruons are the nerve cells that are responsible for transmitting info.

Question 7

where are neurosignals transmitted

Answer 7

Nerosignals are the electrical signals that are transmitting throught neurons

Question 8

what is a nerve

Answer 8

Nerurons are nerve cells. when they are bundled together they are called nerves.

Question 9

name 2 unique structures are nerve cells

Answer 9

dendrites (where the stimuli are recieved) and the axon( where the signal is communicated down to the end of the neroun.

Question 10

what is a dendrite and where is it found

Answer 10

on a nerve cell, They are where the stimuli are recieved

Question 11

what is the axon

Answer 11

axon is where the signal is communicated down to the end of the neroun

Question 12

how many different kinds of signaling do neurons use and what are they called

Answer 12

2 , Electrical signals, chemical signals

Question 13

define electrical signals

Answer 13

Electrical signals- they are like action or graded potentials. There are changes in membrane potential across the plasma membrane. they are used for longs distance signaling

Question 14

what are chemical signals

Answer 14

Chemical signals- signals used in short distance communication. Like the in muscle contraction diffusion of aceytol choline across the cell membrane is an example of this

Question 15

T/F: There can be a combo of electrical and chemical signaling

Answer 15

True

Question 16

what are the 2 major divisions of the nervous system

Answer 16

central nervous system

peripheral nervous system

Question 17

what part of the nervous system is this: this is the integration and control center the sensory info is sent here and interprerreted and then some action will be effected

Answer 17

central nervous system

Question 18

what part of the nervous system is this ? this has nerves that gather and send info to the central nervous system through afferent pathways or they take info from the brain and effecting a response. This is called an efferent pathway.

Answer 18

peripheral nervous system

Question 19

the PNS is an afferent or efferent pathway

Answer 19

efferent

Question 20

The cns is an afferent or efferent pathway

Answer 20

affarent

Question 21

the CNS is made of the

Answer 21

brain and spinal cord

Question 22

what are the 2 divisions of the PNS

Answer 22

in the pns there are 2 divsions: sensory and motor.

Question 23

in the pns is the sensory or motor affarent and which is efferent

Answer 23

The sensory is the afferent( going TO the nervous system) taking info in and convaying it to the CNS
The motor is efferent ( going AWAY from the nervous system) it goes from the nervous system to the effector organs. like muscles and glands

Question 24

what is an axon hillock

Answer 24

the axon hillock connects the cell body proper with the axon.

Question 25

what is the function of dendrites

Answer 25

dendrites which are responsible for receiving signals from the environment.

Question 26

describe the axon

Answer 26

the axon is the long process that comes out with the cell body and ends in the axon terminal.

Question 27

T/F :Action potentials only travel one way. They travel down the cell body to the axon terminal

Answer 27

True

Question 28

what is Mylin sheath

Answer 28

Mylin sheath- has shwawn cells that are wrapped around, they insulate the axon. This helps to increase the rate of conduction of an action potential

Question 29

what structure helps to increase the rate of conduction of an action potential

Answer 29

Mylin sheath

Question 30

what is a synapse

Answer 30

Synapse- this is where chemical signaling can happen between nerve cells.

Question 31

we classify neruons based on :

Answer 31

We can classify neurons based on their:structure and function

Question 32

the structure of a neuron is based on

Answer 32

Structure: based on number of processes ( number of things sticking out)

Question 33

how many different kinds of structures are there of neurons and what are thier names

Answer 33

there are 3 types:multipolar, bipolar or unipolar

Question 34

describe multipolar structure

Answer 34

Multipolar: have 3 or more processes. one is an axon and the others are dendrites.

Question 35

describe a bipolar structure

Answer 35

Bipolar: Has 1 axon and 1 dendrite . These are rare, these are found in the retina or olfactory mucosa.

Question 36

describe unipolar

Answer 36

Unipolar: 1 short process that forms a t junction