how a muscle contracts!

check out this site!

Muscles and kidneys!

Hello gang!

Tonight's assignment should be easier to do than last night's readings.

1.  Watch this video on how a sarcomere contracts.  From this you should know:
a.  what defines a sarcomere
b.  the two main proteins in a sarcomere
c.  What it means if a sarcomere is closed
d.  Which of the proteins is active when the sarcomere is closing.


In addition, there are two remaining ideas from the assessment statements RE kidneys:

1.  How do the levels of protein, glucose, and urea compare in the:
a.  blood plasma
b. glomerulus filtrate
c.  urine

2.  the role of alpha and beta cells in the pancreas RE to insulin and glucagon

Muscles!!

Class,

Please review the basics of how a muscle cell is organized.  This includes Myofibrils, Sarcoplasmic reticullum, nuclei, and the various bands from a sarcolemma.  We will be reviewing it in class, but here's a pretty good site.  Start at paragraph 5 "a closer look at muscle anatomy shows..."

You can then look at the section on sliding filament theory. 

Thanks.

Weekend Biology fun!!

1.  You can finish the take home test, if not done.

2.  Diabetes assignent:  read page 1008 in our textbook.  Pay particular attention to the diagram on page 1008.  After having done this, you should be able to:
a.  tell the difference between type 1 (insulin) and type 2 (lifestyle) diabetes
b.  explain the role of both insulin and glucagon
c.  tell why untreated diabetics have glucose in their urine

I have diabetes, too

Kidneys kidneys and more kidneys!

Cool way to end the week:  Dissection!  Tomorrow we will be looking at the gross anatomy of the kidney.

Homework for tonight:  please do pages 280-281 in your orange book, related to kidney function.

Kidneys!!!

At this point we are done with plants.  In class we reviewed three things abotu plant roots:
1.  How plants absorb h2o (transpiration pull)
2.  How they ACTIVELY bring in ions at the roots
3.  How they work with fungi.

Then we starter kidneys!
Here's the site to watch and ENJOY!!!  Try your hand at the three question quiz, too


Here's another good animation to help you understand.
By the way, the plant quiz deadline has been moved to MONDAY from FRIDAY.

Plants plants plants!

Hello all and good luck with your high stakes testing!

Today in class we reviewed how flowers have evolved to manipulate organisms into pollinating.

We also reviewd Pr ---> Pfr light cycles (see poinsettia question below).

Homework:  General review.
Tomorrow I will give a take home quiz on plants.  It will be on tubes (xylem and phloem) flowers, seeds, and leaves.  The quiz is due on Friday.  Extras can be found by the blue assessment packs in room 232.

Good luck and I'll see you when I see you.