Question

health science

Answer 1

Would you believe my uncle wrote a textbook on neuroanatomy? He drew diagrams of the nervous system on the chalkboard with both hands simultaneously, which made it challenging for the students to keep up :-)

Answer 2

i honestly dont get what you just said....but that is cool that he wrote a textbook on neuroanatomy

Answer 3

When he gave his lectures (this is back in the 50s and 60s) everything had to be drawn on the chalkboard, with multiple colors of chalk. Most people can't draw intricate drawings using both hands at the same time!

Okay, let's look at the first question, and the diagram. Neuron A is called a <blank> neuron because it transmits a nerve impulse from the <blank> to the <blank>. What are the ends of Neuron A connected to in the diagram?

Answer 4

Yes, that's one end, how about the other end?

Answer 5

right?

Answer 6

I think "spinal cord" is the answer desired here...

Answer 7

*it

Answer 8

Do you know the difference between a motor neuron and a sensory neuron?

Answer 9

a motor neutron is a neturon located in the central nervous system and a sensory neutron is a neutron that conducts impulses inwards to the brain or spinal cord

Answer 10

btw, it's "cord", not "chord" — a "cord" is a rope or string or other such item. a "chord" is a group of notes sounded together (like on guitar or piano), or a line that connects two points on the perimeter of a circle (a diameter is a special case of a chord, one that goes through the center).

Answer 11

sorry! ;p

Answer 12

Let's consider this a moment longer. Look at the diagram again. You've got two neurons going from the spinal cord, one to a muscle cell, and another to some skin. Which do you think is more likely to be a motor neuron, and which a sensory neuron?

Answer 13

*right

Answer 14

Well, let me ask you this: when you step outside on a sunny day, do you notice the warm of the sun on your skin, or inside your muscles? :-)

Answer 15

more like skin

Answer 16

warmth, not warm

Answer 17

i have never really noticed

Answer 18

right! the sensory neurons are the ones that do the sensing (or carrying the signals of the sensing), and the motor neurons are the ones that command the muscles to act.

Answer 19

hold on i will be right back

Answer 20

motor neurons are sort of like the control wiring for the muscles.

why don't you look at the second question, and see if you can come up with an answer that makes sense there if answer 8 involves "sensory neuron".

Answer 21

When you see Arnold Schwarzenegger or some other action hero, do you notice the bulging muscles, or the bulging skin? :-)

Answer 22

muscles

Answer 23

Okay. Muscles are the things that move your skeleton about, and motor neurons are used to command them. Skin covers up the muscles (and other tissues) and provides a place for nerve endings to be located to sense various stimuli such as heat, pressure, etc. Motor neurons don't connect to skin cells, and sensory neurons don't connect to muscle cells.

Answer 24

Yes. And A isn't a sensory neuron because it is connecting to a muscle.

Answer 25

okay so then C is a interneutron then right?

Answer 26

No, I was trying to get you to realize that it was not, without just saying so.

Answer 27

ooooh okay! so then A might be a motor neutron!

Answer 28

Sensory neurons carry stimuli to the spinal cord, and motor neurons carry signals back to the muscles to act. Interestingly, it turns out that if that skin shown was your finger touching a very hot object, that the signal doesn't go all the way to your brain before another signal is sent to your muscles to pull your hand away. There are some things called interneurons which connect sensory neurons to motor neurons to make this possible. I would say that neuron B is just such a beast, in fact!

Answer 29

okay! So B is the interneutron!

Answer 30

So A is either motor or sensory and C is either motor or sensory

Answer 31

so i would say A is motor and C is sensory

Answer 32

Yes!

Answer 33

yayyyy!!!!! thank you!!! I need help on one more can you please help!

Answer 34

I am guessing B is muscle, D is joints, and C is bone. Am i right?

Answer 35

cause muscles move bones, so that would be B (force). joints would be D because jounts support bones (fulcrum)

Answer 36

@whpalmer4 ?

Answer 37

Yeah, I think you're correct that the bone is C.

Answer 38

thank you!

Answer 39

muscles are connected to bones via tendons, so that supplies the force, and bones are connected together with ligaments in the joints, which makes for the fulcrum.

Answer 40

I hope that was all of the questions, because I need to head off to the library now...time for the old guy to learn new things :-)