Monday, February 25, 2008
Mon-Day 1
Bio- welcome back! Today we reviewed the parts of the CNS, the brain and spinal cord, and described the function of each part.
We noted that the cerebrum processes the stimuli received from each of the senses. Also, due to its highly concentrated and branched network of neurons, each of which synapses with thousands of other neurons, the cerebrum performs all of your thinking, memory, and imagination/dreaming.
The PNS, peripheral nervous system, involves all neurons beyond the CNS; the PNS reaches all organs and glands of the body- it reaches the "periphery", the outer surface of your body.
The CNS and the PNS are classified based upon their LOCATION; another way to classify the parts of the nervous system uses the maintenance of homeostasis in response to the type of environment:
The SOMATIC nervous system regulates the body by causing changes in the EXTERNAL environment via mostly voluntary nerve impulses sent to muscles. The AUTONOMIC nervous system regulates the body by causing changes in the INTERNAL ENVIRONMENT via involuntary/automatic nerve impulses to target organs/glands.
We further subdivide the AUTONOMIC nervous system into two opposite responses:
sympathetic nerve impulses and PARAsympathetic nerve impulses. SYMPATHETIC nerve impulses are involuntary impulses sent to glands that cause adrenalin, epinephrine, etc. to be secreted, which creates a "fight or flight" response. PARASYMPATHETIC nerve impulses are sent to the same glands that are targeted by the sympathetic pathway BUT parasympathetic impulses cause the secretion of hormones that create a calming down or "rest and digest/relax" response.
Chem 7- we reviewed the method for determining the percent composition (by mass) of each element in a compound. We then applied this method in determining the number of grams of a particular element that could be extracted from a given size sample of a compound.
We began to discuss the relationship between percent composition and empirical formula of a compound.
Chem 8/9: we reviewed the method for determining the percent composition (by mass) of each element in a compound. We then applied this method in determining the number of grams of a particular element that could be extracted from a given size sample of a compound.
We then discussed the relationship between percent composition and empirical formula of a compound. We showed the three to four-step method for determining the empirical formula of a compound from the percent composition by first taking a 100 gram sample of the compound.
We then did a lab in which we collected data in order to determine the percent composition of water in a hydrated salt.
We noted that the cerebrum processes the stimuli received from each of the senses. Also, due to its highly concentrated and branched network of neurons, each of which synapses with thousands of other neurons, the cerebrum performs all of your thinking, memory, and imagination/dreaming.
The PNS, peripheral nervous system, involves all neurons beyond the CNS; the PNS reaches all organs and glands of the body- it reaches the "periphery", the outer surface of your body.
The CNS and the PNS are classified based upon their LOCATION; another way to classify the parts of the nervous system uses the maintenance of homeostasis in response to the type of environment:
The SOMATIC nervous system regulates the body by causing changes in the EXTERNAL environment via mostly voluntary nerve impulses sent to muscles. The AUTONOMIC nervous system regulates the body by causing changes in the INTERNAL ENVIRONMENT via involuntary/automatic nerve impulses to target organs/glands.
We further subdivide the AUTONOMIC nervous system into two opposite responses:
sympathetic nerve impulses and PARAsympathetic nerve impulses. SYMPATHETIC nerve impulses are involuntary impulses sent to glands that cause adrenalin, epinephrine, etc. to be secreted, which creates a "fight or flight" response. PARASYMPATHETIC nerve impulses are sent to the same glands that are targeted by the sympathetic pathway BUT parasympathetic impulses cause the secretion of hormones that create a calming down or "rest and digest/relax" response.
Chem 7- we reviewed the method for determining the percent composition (by mass) of each element in a compound. We then applied this method in determining the number of grams of a particular element that could be extracted from a given size sample of a compound.
We began to discuss the relationship between percent composition and empirical formula of a compound.
Chem 8/9: we reviewed the method for determining the percent composition (by mass) of each element in a compound. We then applied this method in determining the number of grams of a particular element that could be extracted from a given size sample of a compound.
We then discussed the relationship between percent composition and empirical formula of a compound. We showed the three to four-step method for determining the empirical formula of a compound from the percent composition by first taking a 100 gram sample of the compound.
We then did a lab in which we collected data in order to determine the percent composition of water in a hydrated salt.
# posted by C @ 11:56 AM 
