Biology - March 2007

Is it true that your blood thickens when you live in a colder climate? Is this just a saying or an old wive's tale?

2007-03-20 08:14:47 · 3 answers · asked by Anonymous

Please help me

2007-03-20 08:03:38 · 4 answers · asked by Felipe 2

Which of the following were the precursor to the legs, arms, and wings seem in vertebrates today?

a.) gill slits
b.) vertebrae
c.) jaws
d.) fins

thanks for helping everyone

2007-03-20 07:58:53 · 9 answers · asked by AJ 2

2007-03-20 07:49:22 · 19 answers · asked by Anonymous

in the context of homeostasis, a plant that forms tissues over infected parts is demonstrating....?

a.) segmentaion
b.) compartmentalization
c.) diffusion
d.) decomposition

*please dont guess, thanks!

2007-03-20 07:47:07 · 1 answers · asked by AJ 2

Do other species itch? i.e. amphibians, marsupials, birds?

2007-03-20 07:34:32 · 1 answers · asked by micamocha 1

1.From which of the following structures does a flatworm expel solid waste?
A.vesicle
B.mouth
C.pores in skin
D.cloaca

2.Which of the following best describes the excretory system of a flatworm for liquid waste?
A.highly branched
B.nonexistent
C.simple tube
D.unicellular

3.In which cellular structure is plant waste stored?
A.cytoplasm
B.cell membrane
C.central vacuole
D.cell wall

2007-03-20 07:33:57 · 6 answers · asked by Anonymous

2. Fill in the blanks in the following concept map by writing the correct word or phrase in order.

Homeostasis depends on the A.________ that moes materials in and out of hte cell using protein channels.

2007-03-20 07:18:01 · 3 answers · asked by cherryvalley2006 2

1. For each pair of terms explain the differences intheir meanings.

D.endocytosis, exocytosis

2007-03-20 07:15:27 · 4 answers · asked by cherryvalley2006 2

2007-03-20 07:14:59 · 5 answers · asked by Anonymous

1. For each pair of terms, explain the differences in their meanings.

C. facilitated diffusion, active transport

2007-03-20 07:12:45 · 4 answers · asked by cherryvalley2006 2

Can someone describe to me the mechanism by which aldosterone helps maintain blood pressure. But when you explain it to me can you start with the low blood pressure.

2007-03-20 07:08:40 · 3 answers · asked by Anonymous

1. For each pair of terms, explain the differeneces in their meanings.
B. cell division, mitosis

2007-03-20 07:05:13 · 2 answers · asked by cherryvalley2006 2

When a person is cremated, do they leave their clothes on during the process? It seems like a shameful waste of a good suit!

2007-03-20 07:03:49 · 4 answers · asked by Windsor 2

2007-03-20 06:54:45 · 10 answers · asked by Anonymous

2007-03-20 06:43:47 · 1 answers · asked by WEHA 3

Please read the article and help explain refering to the comments in the()

The liver stores glucose by converting it to glycogen.(I understand so far) It holds perhaps a 12-hour supply of glucose in its glycogen(typo, did it mean liver? If it converts to glycogen how can it be held in glycogen?) . Once you finish digesting all of the carbohydrates that you last ate, the liver starts converting its stored glycogen back into glucose and releases it to maintain glucose in the blood. (Understood)Lipolysis (lip-what?) also starts breaking down fat in the fat cells and releasing fatty acids into the bloodstream. Tissues that do not need to use glucose for energy (for example, muscle cells) start burning the fatty acids. This reduces the glucose demand so that nerve cells get the glucose. (ok, how does this affect your body?)
Once the liver runs out of glycogen, the liver converts to a process called gluconeogenesis. Gluconeogenesis turns amino acids into glucose. (I got lost)

2007-03-20 06:43:07 · 2 answers · asked by Anonymous

To what Extent are Humans in a technological society exempt from natural selection? Explain why or why not.



Is te concept of natural selectiong relevant in a political or economic context? In other words, if a particular nation or corporation achieves success or dominance, does this mean that it is more fit that its competitors and that unregulated dominance is justified? Why or why not?

2007-03-20 06:36:24 · 5 answers · asked by Anonymous

2007-03-20 06:22:40 · 1 answers · asked by samiksha v 1

2007-03-20 06:03:16 · 4 answers · asked by Anonymous

2007-03-20 06:00:13 · 7 answers · asked by Anonymous

For each of the following statements choose the term from the two choices
1) Insulin will cause the blood sugar level to increase/decrease.
Answer: increase
2) When the blood sugar level is high/low, islet cells will release glucagons.
Answer: low
3) Diabetes mellitus may result from dysfunction of the alpha/beta cells.
Answer: Beta
4) One effect of adrenaline is the increase/decrease in blood flow to skeletal muscles.
Answer: increase
5) As a response to stress, the adrenal medulla/cortex secretes adrenaline.
Answer: cortex
6) Releasing factors from the hypothalamus stimulate hormone production in the anterior/posterior pituitary.
Answer: anterior

2007-03-20 05:48:11 · 2 answers · asked by Anonymous

1.Which part of the digestive system starts the breakdown of proteins?
A.
large intestine

B.
esophagus

C.
stomach

D.
small intestine


2.What is the primary function of the esophagus?
A.
to carry food from the mouth to the stomach

B.
to digest simple carbohydrates into sugars

C.
to excrete bile and other enzymes onto the food

D.
to absorb extra water and minerals


3.Pancreatic fluid contains enzymes that can digest all four types of macromolecules: carbohydrates, lipids, proteins, and nucleic acids. Into which organ does the pancreas excrete those enzymes?
A.
stomach

B.
small intestine

C.
liver

D.
large intestine

2007-03-20 05:47:33 · 4 answers · asked by live~laugh~love 1

The trachea carries air directly to the lungs. The trachea is made up of cartilage with a “ring” shape all the way down. Hypothesize how this ring-like structure helps the function of carrying air to the lungs.

2007-03-20 05:30:42 · 4 answers · asked by Anonymous

2007-03-20 05:30:37 · 10 answers · asked by Anonymous

2007-03-20 05:27:41 · 3 answers · asked by princess 1

2007-03-20 05:24:57 · 3 answers · asked by Anonymous

2007-03-20 05:24:44 · 5 answers · asked by Filip 1

how many kinds of insects die after stinging just once?

2007-03-20 05:16:57 · 4 answers · asked by maez 2

Why is it that a man's sexual prime(age 12 to 30) is well before a woman's, whom by then(when she's 30+) has missed the man's prime? Is this a cruel joke on God's part?

2007-03-20 05:15:29 · 10 answers · asked by joshnya68 4