Muddiest points

Hey Guys.. I'm confused on what the alveoli do or if they even have a purpose.
 -Thanks Makenzie

Muddiest Point

Hey Guys so I'm a bit confused on what the Palisade layer does in the leaf and also what structures in the leaf are involved in conserving water and how the do it. Thanks -Makenzie

Muddiest Point

Hey guys, so I don't understnad what Mrs. Stein was explaining in class on friday about the cycle. It was like hypothalamus gland gives to the pituitary gland and that gives to something else. I did'nt understand the concept of the cycle and how it worked. If someone could help that would be grand!

Friday, January 6th 2012

We started off this class by reviewing the homework from last night. Then we started lab 31.

Here are some of the things that we reviewed:

Hormone: protein travels through blood system to communicate with glands

Pituitary Gland:

-secretes 9 hormones

-regulates other endocrine glands

-tells other glands to release what hormone

Hyptothalamus Gland:

-integrates the endocrine and nervous systems

-controls pituitary gland

Control of the Endocrine System:

-regulated by a feedback mechanism

-negative- last signal inhibits the first

-positive- last signal stimulates the first

Menstrual Cycle:

-average of 28 days

-body prepares for pregnancy

-occurs from puberty until menopause

http://www.youtube.com/watch?v=8_rfZ_qj1z4

http://www.youtube.com/watch?v=pQ4QOQdnifk

Homework:

-lab 31

-read 34.4 with flow map on fertilization, development, and pregnancy

-UP 20-21

Next scribe will be: Janie!

Muddiest Point

Hey guys so my Muddiest Point for this unit is Pedigrees. I don't understand how if you have two parents who aren't carriers or diseased how they can have a child who is diseased or carriers. An example of this is on page 48 of UP.

Cri-Du-Chat

For my genetic disorder I choose Cri-Du-Chat, here is some background on it.

Cri-Du-Chat is a syndrome that makes a baby's cry sounds like one of a cat. This is a result from missing a part of the 5th chromosome. Other names for Cri-Du-Chat is cat cry syndrome, 5p minus syndrome, and chromosome 5p deletion syndrome. It is believed to develop during the egg or sperm. Symptoms of Cri-Du-Chat are downward slant to the eyes, a low birth weight and slow growth, low set or abnormally shaped ears, webbed fingers or toes, wide set eyes, small head or small jaw. There is no treatment for Cri-Du-Chat but a doctor may prescribe things that can manage the treatment. The disorder is rare. 1 in 20,000 babies are diagnosed with the syndrome a year and is found in all ethnicity's. Most children dont survive past the first few months, and 90% pass away by the first year. It is possible but rare to live longer. The longest person to live with Cri-Du-Chat lived to 60 years of age.

Scribe 11.8.11

Hey Guys!

Today we had a shortened class so we did much less.

First we finished the Disease of the Day sheet.

Here is a review of the Disease's we have gone over:

-AIDS: Virus: no cure, attacks immune system, spread through physical contact

-Cholera: Bacteria: death by diarrheal, poor sanitation, can treat most with antibiotics

-Schistosomiasis: Helminth(worm): transmited by snails-larva, infects liver, blatter, uranery

-Influenza: Virus: transmited through mucas-saliva-contact, treated for symptoms only, vaccine- wash hands

-Malaria: Protozan: transmited misquito bites, attack liver and red blood cells, hard to treat, prevent with bed nets

-Tuberculosis: Bacteria: infects lungs, resistance to anti biotics

-Pneumonia: Bacteria, Virus, Fungi: vector born through tick, joint pain/flu symptoms/rash/bullseye

Next we went over the homework, it was worksheet pages in the UP about AIDS.

We finished class by going over out partner quiz. Some of the key points follow:

-Helper T-cells are destroyed by HIV

-Allergy- overreaction to immune system- caused when antigens release histamines

-Autoimmune- when immune system fails to recoginize self

-Retrovirus- (retro:backwards)- normal: DNA-RNA-PROTIEN, retrovirus: RNA-DNA-RNA-PROTIEN

-Killer T- cells- destroys infected cells

-Antibodies: bind Antigens together, mark antigens for distruction of macrophage, disable pathogens

Other thing you might need to know for test:

B-cell: mature in bone marrow, provide numeral immunity

Interferons: slow down or stops activity of B-cells

Antibody: attach antigen and flag for distruction by macrophage

Macrophage: big eating cell, eats bacteria

Homework:

Study for TEST!!!!

DONT FORGET TEST TOMORROW!!

Next scribe will be: Jason!

Comment for Makenzie

The helper T-Cells are activated by the macrophages and then activate the other cells (both T and B) The Plasma B cells produce antibodies and the Memory B cells remember the antigen in case you are infected again.

Muddiest Point

Hey guys! I am having trouble understanding the difference between what helper T-cells, T-cells and killer T-cells are. If someone could explain this to me that would be great! Thanks!

Muddiest Point

Hey guys I am confused from chromatin and chromatid. If someone could help me understand this better that would be great! Thanks!

Scribe! 9.27.11

Hey guys! I thought today in class was a pretty easy going day. We learned alot though! Here is most of the things that we learned during Bio today.

1. When you walked into class you where sposed to pick up your stampsheet, new UP for the new cells unit we started.

2. Next we got back a updated grade sheet.

3. We started to take notes on cells! here is a summary of some of the notes we took on what we already know about cells.

• Necleus, DNA, controls cells functions
• mostly small, not all same size, some can be seen with eye (ex: egg)
• billions of them
• cytoplasm- gel like, water, ions, minerals ect.
• all living things are made of cells
• unicellular and multicellular
• mitochandria
• lysosomes
• golgibody
• vacuoles
• asexual reproduction- cells come from other cells
• ribosomes
• prganelles
• membrane
• cancer- uncontrolled cell division
• Types of cells: plant and animal, orkaryotes and eukaryotes,red and white blood cells. Structure ditermens function, cells specialized.

The homework was to read the lab on pages 9-14 and complete the prelab on page 8.

The next scribe will be...Janie!

Muddiest Point

Hey Guys, I don't really have anything straight from the book that is really confusing me. I just am questioning how to take good notes and how to study better. Mostly how to study though, I am so bad at studying for test's and quiz's and if anyone could give me some pointers that would be great!! Thanks!

Unit One Reflection

I thought that unit one went pretty well. I really liked the bean and the Tetrahymena labs that we conducted. Most of the microscope information was a review to me because we learned a lot about them last year. Some of the small things confused me, like what is science. I realized I need to study more for upcoming tests. This year I am going to make a effort to come in and get help when I need it! Biology seems like a really cool class and I cant wait for the rest of the year to come!

Elephants!

Hey Guys! Something that I think is interesting is Elephants! I don't know why but I love Elephants! They look so cute and lovable! Elephant ancestors started about two feet tall and had no trunk and was called Moeritherim. Then the animals grew nose-upper lips during Earth's cooling period and the Mammoth was developed. The point of a trunk if so that animals with short necks can reach their food that if higher up. The Asian and African Elephant are the only two surviving species. The Asian Elephant has two "fingers" at the tip of its trunk which is for picking up small items. There is over 100,000 muscles in the trunk of this Elephant. The animal is also a herbivore, plant eating. Elephants have to eat a lot a day because almost half of their food passes through undigested. Herds are led mostly by a matriarch and followed by their daughters, offspring, and sisters. Males usually are solitary. Some fun facts about Elephants are that they can cry, they have incredible memories, even thought they have large ears they have poor hearing, walk around 4mph, they have bad eyesight, and they are the largest land mammal!

What I am most exited about this year: I am really exited for my first pep rally, and I am exited to do fun hands on labs during Bio!

What I am least exited about this year: Like everyone, I am least exited about finals and homework!