Vocabs:
29.1
Stimulus: is a kind of respond of the body, keeping the body from being any harm ways
nervous system: is a highly connected network of tissue, help you to think, work, move,
sense, and control other organs.
central nervous system (CNS): is the nervous system that contain the brain and spiral core.
peripheral nervous system (PNS): connect CNS to every part of the body.
endocrine system: are isolate organs, connect by blood stream and not the nervous system
29.2
Neuron: are the cells that make up the entire network; it composes of
_Dendrite: short branches spread, help to receive signal
_Axon: a the long tail which carry electric impulse (send signal)
Synapse: the tiny space between 2 neurons
Axon terminal: the end of the axon
Action potential: is when a electric signal goes through the neuron
Neurotransmitter: are chemical release into space when A.P (also called synapse)
29.4
Cerebrum: is the large part of the brain that control though, and interprets information to
your brain
Cerebellum: is the small portion that maintain balance of the body
Reflex arc: are stimulus of the body without involving the brain to take command
Somatic nervous system: Are part of PNS that are voluntary
Autonomic nervous system: Are part of PNS but involuntary
Website and source use:
http://www.massinformation.org/what-is-a-neurons/
Biology book
http://www.360balance.com/neuropathy.html
Mr.Sharp
http://faculty.stcc.edu/AandP/AP/AP1pages/nervssys/unit10/resting.htm
A:
Nervous system is a highly connected network of tissue, help you to think, work,
move, sense, and control other organs (Nowicki 874). The cells that making up this entire
complicate network are called neurons.
Looking at the picture in the
left, the neuron cell looks like
an antenna; the tree brancheslike extension out of the cell
body are call Dendrites, Its
only job is to receive the
messages form neighboring
cells(Norwicki 876) . Received
(Articles)
the message, the cell send it
through the axon covering by
the myelin sheath and when it reach the ending tip of the axon which is calls
terminal, the message will be send to another neuron cell. *Neuron cells are very
unique, “Unlike other cells, neurons cannot replace themselves. Damage to
neurons is permanent” (Articles)*
( Peripheral)
The nervous system
is made out of 2 parts; the
Central Nervous system
(CNS) and Peripheral
nervous system (PNS). The
CNS only compose of the
brain and the spiral core, it
acts like headquarter for
the nervous system for it
only receives, judges and sends command to the PNS (Nowicki 885). On the other hand,
PNS is only a series of nerves that connects to CNS and through out the whole body, its
jobs are to detect stimulus inside and outside the body using Sensory neuron and report
back to the CNS for respond (Nowicki 875). When received the message, a specific
neuron from CNS calls motor neuron will carry out the command from the CNS to
targeted muscle or organs and base on the situation, each respond will be different
(Nowicki 885). Although there is one special respond, called Reflex arcs; it responds
almost immediately when receptors make contact with outside influence, the reason for
this is because it only need to travel to the spiral core and to receive unlike other which
have to go all the way to the brain.
The nervous systems also involve greatly maintaining the state of homeostatic,
which is to protect our body internal environment and maintained it constantly overtime.
One way the body’s nervous system help maintain homeostasis through Autonomic
Nervous System which is part of the PNS that controls involuntary organs of the body
such as the heart, the digestion system, circulatory system…etc,(Norwiki 890) without it,
our organs will not function and we will die. Opposite of this system is the Somatic
nervous system, it has the job to control all movements over which you have voluntary
control (Norwicki 889)
Signal and transferring signal in-depth:
When the message appears and travels down the axon, it is in a form of electrical
impulse and calls action potential (Nowicki, 878). 2 ions are needed for this electrical
impulse to happen, and they are call Na+ and K+.
When there is no
message transferring,
the neuron remain in
it resting potential ,
this resting potential
occurs because there
are unequal K+ and
Na+ inside and
(Tarwankin)
outside the cell
(Nowicki 877). When being hit, touch, sense, feel by the skin, receptors in the skin felt
the pressure and send neuron cell an alarm (Sharp).Na+ rapidly come into the cell
through Active Transport, K+ flow out of the cell, an electrical impulse was create and
rapidly moving down toward the axon terminal, *Every time the electrical impulse move
past, the cell change back to resting potential*(Norwicki 879). When the impulse reaches
the terminal, it cause the vesicles that holding neurotransmitters which is a chemical that
stimulate other neuron by letting Na+ enter the cell (Norwicki 879) to merge and release
it into synapse (Norwicki 878). The neurotransmitter will then bind to the receptors on
the neighboring neuron, active the cell to let Na+ in (Norwicki 878).
Works Cited
Article. "What Is a Neurons?" Massinformation.org - The Library of Knowledge. Mass
Information Organization, 9 Oct. 2010. Web. 13 May 2011.
<http://www.massinformation.org/what-is-a-neurons/>.
Nowicki, Stephen. "Nervous and Endocrine Systems." McDougal Littell Biology.
Evanston, IL: McDougal Littell, 2008. 874+. Print.
"Peripheral Neuropathy." 360° Balance (Austin, Texas). 1 Feb. 2011. Web. 13 May 2011.
<http://www.360balance.com/neuropathy.html>.
Sharp, Darrel. AIS School; Room 108, Ho Chi Minh City. 13 May 2011. Speech.
Tamarkin, Dawn A. "Resting Potential." STCC Faculty Webpages. Foundation Press, 29
Jan. 2011. Web. 13 May 2011.
<http://faculty.stcc.edu/AandP/AP/AP1pages/nervssys/unit10/resting.htm>.