Wednesday, January 23, 2008
Wednes-Day 1
Bio- HW: Outline section 37.3 is due on FRIDAY.
we recapped our discussion of the respiratory system by looking at some animations. We focused on the exchange of oxygen and carbon dioxide in the alveoli and surrounding capillaries. We also saw an animation that explained the mechanics of breathing in terms of diaphragm contractions that cause air pressure differences between the chest (thoracic) cavity and the environment.
I'll post those videos on Blackboard for your review.
We also began the excretory system by noting the organs that serve several purposes but that are also involved in excretion:
the skin- necessary for regulation (temperature and water balance) but also functions in excretion by ridding the body of excess water, salts, and urea.
the liver- has a digestive/nutrition function (secreting bile) and a regulation function (converting glycogen to glucose and vice-versa); its excretory function is to detoxify the blood and to form urea from the breakdown of amino acids, the urea is then excreted via the skin and the kidneys.
the lungs- naturally are the main part of the respiratory system but the lungs are simultaneously excreting carbon dioxide, a metabolic waste, from the body.
We then focused on the main organ or the urinary system, which is one of the main systems used in excretion. We looked at the illustration of its parts: the kidneys, the ureters, the urinary bladder, and the urethra. We will go into further detail on that tomorrow.
We continued with the NY State "Making Connections" Lab by discussing the aspects of a valid scientific experiment/study that can be used to resolve differences of opinion about natural phenomena. Specifically, you designed an experiment that will determine whether exercising before a particular exercise will increase or decrease the level of muscle fatigue. We will continue that on Friday.
Chem 7- NOTE! Due to the Math A Regents, our class tomorrow (THURSDAY) will be held in Room 243! Do not go to Room 307 on Thursday.
Today, we reviewed the prefix vs. the Stock system for naming molecules.
We then focused on determining the oxidation numbers/states of each atom in a polyatomic ion and in a salt of a polyatomic ion. We saw that, the oxidation numbers of the atoms within the polyatomic stay the same, whether the polyatomic ion is part of a salt lattice or just by itself (in solution).
Beware, correctly naming compounds takes a lot of practice! The quarterly exam is on Friday and Monday. You need to do many (at least 10 of EACH type of compound) naming problems in order to be competent on the test.
We then showed how to determine the number of "atoms" (sometimes a combo of atoms AND ions) in each "formula unit" of a compound.
Chem 8/9 - NOTE! Due to the Math A Regents, our class tomorrow (THURSDAY) will be held in Room 243! Do not go to Room 307 on Thursday.
Today, we reviewed the prefix vs. the Stock system for naming molecules.
We then focused on determining the oxidation numbers/states of each atom in a polyatomic ion and in a salt of a polyatomic ion. We saw that, the oxidation numbers of the atoms within the polyatomic stay the same, whether the polyatomic ion is part of a salt lattice or just by itself (in solution).
We briefly discussed the outdated "ic" vs. "ous" system for naming salts of transition metals; this system is neither on the Regents exam nor on the quarterly exam.
Beware, correctly naming compounds takes a lot of practice! The quarterly exam is on Friday and Monday. You need to do many (at least 10 of EACH type of compound) naming problems in order to be competent on the test.
We then showed how to determine the number of "atoms" (sometimes a combo of atoms AND ions) in each "formula unit" of a compound.
We finished our discussion of the molecular model lab and handed that in.
we recapped our discussion of the respiratory system by looking at some animations. We focused on the exchange of oxygen and carbon dioxide in the alveoli and surrounding capillaries. We also saw an animation that explained the mechanics of breathing in terms of diaphragm contractions that cause air pressure differences between the chest (thoracic) cavity and the environment.
I'll post those videos on Blackboard for your review.
We also began the excretory system by noting the organs that serve several purposes but that are also involved in excretion:
the skin- necessary for regulation (temperature and water balance) but also functions in excretion by ridding the body of excess water, salts, and urea.
the liver- has a digestive/nutrition function (secreting bile) and a regulation function (converting glycogen to glucose and vice-versa); its excretory function is to detoxify the blood and to form urea from the breakdown of amino acids, the urea is then excreted via the skin and the kidneys.
the lungs- naturally are the main part of the respiratory system but the lungs are simultaneously excreting carbon dioxide, a metabolic waste, from the body.
We then focused on the main organ or the urinary system, which is one of the main systems used in excretion. We looked at the illustration of its parts: the kidneys, the ureters, the urinary bladder, and the urethra. We will go into further detail on that tomorrow.
We continued with the NY State "Making Connections" Lab by discussing the aspects of a valid scientific experiment/study that can be used to resolve differences of opinion about natural phenomena. Specifically, you designed an experiment that will determine whether exercising before a particular exercise will increase or decrease the level of muscle fatigue. We will continue that on Friday.
Chem 7- NOTE! Due to the Math A Regents, our class tomorrow (THURSDAY) will be held in Room 243! Do not go to Room 307 on Thursday.
Today, we reviewed the prefix vs. the Stock system for naming molecules.
We then focused on determining the oxidation numbers/states of each atom in a polyatomic ion and in a salt of a polyatomic ion. We saw that, the oxidation numbers of the atoms within the polyatomic stay the same, whether the polyatomic ion is part of a salt lattice or just by itself (in solution).
Beware, correctly naming compounds takes a lot of practice! The quarterly exam is on Friday and Monday. You need to do many (at least 10 of EACH type of compound) naming problems in order to be competent on the test.
We then showed how to determine the number of "atoms" (sometimes a combo of atoms AND ions) in each "formula unit" of a compound.
Chem 8/9 - NOTE! Due to the Math A Regents, our class tomorrow (THURSDAY) will be held in Room 243! Do not go to Room 307 on Thursday.
Today, we reviewed the prefix vs. the Stock system for naming molecules.
We then focused on determining the oxidation numbers/states of each atom in a polyatomic ion and in a salt of a polyatomic ion. We saw that, the oxidation numbers of the atoms within the polyatomic stay the same, whether the polyatomic ion is part of a salt lattice or just by itself (in solution).
We briefly discussed the outdated "ic" vs. "ous" system for naming salts of transition metals; this system is neither on the Regents exam nor on the quarterly exam.
Beware, correctly naming compounds takes a lot of practice! The quarterly exam is on Friday and Monday. You need to do many (at least 10 of EACH type of compound) naming problems in order to be competent on the test.
We then showed how to determine the number of "atoms" (sometimes a combo of atoms AND ions) in each "formula unit" of a compound.
We finished our discussion of the molecular model lab and handed that in.
# posted by C @ 12:57 PM 
