Monday, January 7, 2008
Mon-Day 2
Bio- tomorrow, the outline to the text section 35.2 is due.
Today we discussed the disorders/diseases/failure to maintain homeostasis of the digestive system.
We looked at such maladies as constipation (too much water reabsorbed by the colon), diarrhea (too little water reabsorbed by the colon along with rapid peristalsis and movement of undigested food), appendicitis, and gall stones.
We then looked at the life process of nutrition in general; there are two main types of nutrition among organisms: autotrophic (plants and algae make their own food via photosynthesis and then digest their own food) and heterotrophic (organisms that must ingest and digest other organisms for nutrition).
We saw that bacteria and fungi have adaptations for nutrition by which they secrete enzymes EXTRACELLULARLY to digest food particles outside of their cells; then, the products of digestion: glucose, amino acids, nuclei acids, and fatty acids, are absorbed via diffusion into the bacteria or fungi.
Amoeba use their cell membranes to form pseudopods to engulf/ perform phagocytosis on food particles in their surrounding; then, the amoeba digests the food intracellularly. Paramecia sweep food into their oral grooves and then digest the food intracellularly.
We then looked at various nutrients that are ingested for survival:
fats, proteins, lipids, nucleic acids, vitamins, minerals, and water (see video on Blackboard).
Chem 7/8: we looked at the four main molecular geometries: linear, bent, trigonal pyramidal, and tetrahedral, and saw that all molecular geometries are caused by the electron pair repulsions around the central atom. So electron geometry causes molecular geometry.
We then practiced reasoning from Lewis structures to molecular geometry.
Do the related problems in the hw packet and I will post some more worksheets with solutions on Blackboard soon.
We then began our molecular model lab which shows you, in 3-D, how the shape of a molecule can be determined from its Lewis Dot structure.
Chem 9: we looked at the four main molecular geometries: linear, bent, trigonal pyramidal, and tetrahedral, and saw that all molecular geometries are caused by the electron pair repulsions around the central atom. So electron geometry causes molecular geometry.
We then practiced reasoning from Lewis structures to molecular geometry.
Do the related problems in the hw packet and I will post some more worksheets with solutions on Blackboard soon.
Today we discussed the disorders/diseases/failure to maintain homeostasis of the digestive system.
We looked at such maladies as constipation (too much water reabsorbed by the colon), diarrhea (too little water reabsorbed by the colon along with rapid peristalsis and movement of undigested food), appendicitis, and gall stones.
We then looked at the life process of nutrition in general; there are two main types of nutrition among organisms: autotrophic (plants and algae make their own food via photosynthesis and then digest their own food) and heterotrophic (organisms that must ingest and digest other organisms for nutrition).
We saw that bacteria and fungi have adaptations for nutrition by which they secrete enzymes EXTRACELLULARLY to digest food particles outside of their cells; then, the products of digestion: glucose, amino acids, nuclei acids, and fatty acids, are absorbed via diffusion into the bacteria or fungi.
Amoeba use their cell membranes to form pseudopods to engulf/ perform phagocytosis on food particles in their surrounding; then, the amoeba digests the food intracellularly. Paramecia sweep food into their oral grooves and then digest the food intracellularly.
We then looked at various nutrients that are ingested for survival:
fats, proteins, lipids, nucleic acids, vitamins, minerals, and water (see video on Blackboard).
Chem 7/8: we looked at the four main molecular geometries: linear, bent, trigonal pyramidal, and tetrahedral, and saw that all molecular geometries are caused by the electron pair repulsions around the central atom. So electron geometry causes molecular geometry.
We then practiced reasoning from Lewis structures to molecular geometry.
Do the related problems in the hw packet and I will post some more worksheets with solutions on Blackboard soon.
We then began our molecular model lab which shows you, in 3-D, how the shape of a molecule can be determined from its Lewis Dot structure.
Chem 9: we looked at the four main molecular geometries: linear, bent, trigonal pyramidal, and tetrahedral, and saw that all molecular geometries are caused by the electron pair repulsions around the central atom. So electron geometry causes molecular geometry.
We then practiced reasoning from Lewis structures to molecular geometry.
Do the related problems in the hw packet and I will post some more worksheets with solutions on Blackboard soon.
# posted by C @ 1:18 PM 
