Muddiest Point

Hey i'm confused on the different hormones and what they exactly do, espesially progesterone. Also, I am a bit confused on what all the glands are and what hormones they release.

Muddiest Point

hey guys! I'm struggling with the hormones, and what roles the play. Like FSH and LH, what exactly do they do?

thanks!

Muddiest Point

Hey guys! so for my muddiest point, i am having trouble understanding what diagram D shows on the diagram of the menstrual cycle. i understand what it is showing but i dont understand why it is the way it is. If anyone could help me that would be great.
Thanks, Kelli

Muddiest Point

Hey! I don't understand what the feedback mechanism is and what positive and negative feedback is. Can somebody please help me?

-Thanks, Tanya P

Muddiest Point!

I was reading through the objectives sheet and it says something about secondary sex characteristics, if you could please tell me what that is that would be great! Also, If you could please tell me the what exactly each hormone (LH, FSH, estrogen, progesterone) does, because I'm getting really confused as to what affects what and what secretes what. I hope this isn't too much, and you can do either question. Thanks!

-Christina P

Muddiest Point

Hi guys! so i really do not get what Embryonic Development is with the 4 different types. i don't understand what it's for and what the 4 different ones do. That whole area kind of confuses me. If someone could just clear it up for me that'd be great thanks!

Muddiest Point

Hey guys, I'm kinda confused on when the zygote actually forms in the menstral cycle. I understand the other parts, but this is still a little unclear. If someone could help that would be awesome! Thanks

Muddiest Point!

Hey everyone!

So I don't really understand very clearly what a blastocyst is and why it's so important.

If someone could help me out that'd be great!

Thanks!!

Muddiest Point

Hey guys,

I am confused on the same thing everyone else is, the feedback mechanisms and also the hypothalamus gland and what it does.

Thanks

Muddiest Points!

Hey guys!

I was reading and looking through the Muddiest Points to comment and I noticed a lot of people asked about "feedback mechanism", "negative feedback", and "positive feedback". I think I know what they are, but I'm not at that point where I'm confident enough to help others with it. It would be very helpful if someone can explain it. Also, I'm still confused about FSH and LH hormones. It would be great if someone explained what they are and what they do.

Thanks so much!!! :)

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!

Muddiest Point!

Hey guys. So I've been confused about the difference in the menstrual cycle when there is a zygote and when there isn't. Is there anything different or what are somethings that are the same?Thanks!

Muddiest Point

Hey guys. This is kind of like what everyone else is saying, but i don't really understand the positive/negative feedback. i also don't understand what the hypothalamus gland is and what it does. Thanks:)

Muddiest Point

Hello everyone,
         Im having troubles understanding the negative and positive feedback loop (in the context of hormones and the menstrual cycle). Thanks!

Muddiest Point

Hey Guys!

I am having trouble understanding how feedback works. Can someone please explain this to me? Thanks!

Muddiest Point!

Hi Everyone,

Please explain the three embryonic layers, ectoderm, mesoderm, and endoderm and what organs and systems develop from these layers.

Thanks,

Sonya A.

Muddiest Point!

What I'm confused about FSH and LH. Does a certain one signal the ovaries to secrete estrogen and the other one to secrete progesterone, or do they both signal the ovaries to secrete either hormone?

Thanks

Muddiest Point

Hi!
My Muddiest Point is distinguishing the amnion and chorion. What is the difference between the two?
Also, what are the Negative/Positive Feedback Loops? I was looking through the objectives, and I didn't recognize some of these things..

Thanks!

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!

Scribe 12/13/11

Today in class we turned in the web quest (UP 83-85) and we turned is as much as we did of it in class.

Here are 3 diseases you can see by looking at the karyotype:

1. Terner Syndrome: ONLY in a girl with 1 X chromosome

2. Down Syndrome: Has an extra chromosome (extra #21 chromosome)

3. Klinefelter Syndrome: Males have 2 X chromosomes which means they have (XXY)

More things we discussed in class include:

• The way you get a trisomy or monosomy is by a problem ("oops") during meiosis called a nondisjunction
• Most cases produce Gametes that are not viable (can't be used)

What is Genetic Engineering?

   Manipulating DNA for practical purposes:

• DNA sequencing and the Human Genome
• Transgenic organisms have many applications in agriculture
• DNA finger printing is used in forensics

   Genetic Engineering Tools:
       PCR:

• Polymerase Chain Reaction (PCR) uses DNA polymerase to make many copies of DNA

       Restriction Enzymes:

• Proteins with recognize and cut SPECIFIC base sequences in DNA
• Results in fragments of DNA with "Sticky Ends"

Later in class we watched a short movie called, "A Not So Perfect Match"

• When they find DNA on a crime they use it to see if they can find a person who has matching DNA or even something close to find a family member

HOMEWORK:

1. Muddiest Points!
2. Test FRIDAY
3. Quiz Retakes by THURSDAY
4. **Remember she will give stamps for UP 73/74 tomorrow**

Next Scribe: KELLI