Biology Is Life !

The Heterotrph Hypothesis and Natural selection are different in their proposals to the way life began. The former proposal is that all life evolved out of non-living elements long ago and their originlly were different life-forms. The latter proposal is that there was only one life-form at the beginning of life on Earth and that everything that lives today are descendants of it. Now, my question is how does respiration differ among plants and animals? Click Here
 

Respiration differs among plants and animals by that plants use anaerobic respiration and animals use aerobic respiration. Anaerobic respiration is the production of energy without the presence of oxygen. Anaerobic respiration occurs in some yeasts and bacteria, and in muscle tissue during strenuous exercise when there is insufficient oxygen. Aerobic respiration is the breakdown of foodstuffs to create energy in the presence of oxygen. Now, my question is what is negative feedback?
 

Most endocrine hormones are controlled by a physiologic negative feedback inhibition loop, such as the glucocorticoids secreted by the adrenal cortex. The hypothalamus secretes corticotropin-releasing hormone (CRH), which directs the anterior pituitary gland to secrete adrenocortocotropic hormone (ACTH). In turn, ACTH directs the adrenal cortex to secrete glucocorticoids, such as cortisol. As a check on the system, glucocorticoids not only perform their respective functions throughout the body but also negatively affect the release of further stimulating secretions of both the hypothalamus and the pituitary gland, effectively reducing the output of glucocorticoids once a sufficient amount has been released.Now, my question is what is the role of the Human Endocrine system?Click Here
 

A1... you need to correct yourself "plants use anaerobic respiration" then you say "Anaerobic respiration occurs in some yeasts and bacteria, and in muscle tissue "

Both plants and animals "do" aerobic respiration. your second statement identifies "who does" anaerobic.
 

..and PS, where is your link?
 

The role of the human endocrine system is to regulate bodily processes. The endocine glands or ductless glands do this by producing hormones. They are released into the bloodstream and goes to tissues to exert an effect. The system helps maintain homeostasis and makes slow long lasting adjustments.

My question is what is the difference between smooth, cardiac, and skeletal muscle?
Muscles
 

A skeletal muscle is on a bone, they are striated and are under voluntary movement. A smooth muscle is in digestive organs, diaphram, arteries, veins, other organs and are involuntary. The cardiac muscles are involuntary but are in the heart.
Muscle Tissue :)What are the three main parts of the brain and what do they do?
 

All right I am correcting myself so answer the question the cookie posted

Plants during respiration harness the energy from food they made during photosynthesis. And animal during respiration use the energy from they have consumed.

negative feedback
 

GREAT ANSWER A1!
:)
 

There are way more than 3 parts to the brain the the main three are the cerebrum cerebellum and the brain stem. The Cerebrun controls memory and thought, the cerebellum controls balance and coordination and the brain stem connects different sides of the brain to the spinal

parts of the brainWhat is the oldest example of a "living fossil"?
 

and then there is the ever popular medulla, which deals w/ involuntary activities like breathing rate...
:o
 

The oldest example of a "living fossil" was disvovered in the 1998 find off Sulawesi, Indonesia. The Coelacanth was a fish that was once described as a "missing link." Evolutionists thought these lobed-fin fish were our possibly our ancestors. The fossils of these fish appear primitive. They received a nicname, "Old Four-legs" because these fish have fins at the end of what looks like short legs.

Click HereIf you can find another example of the oldest fossil, johnson let me know. (:

What are three things that effect enzyme rate? ----->
 

Three things that affect enzyme rate are temperature , cofactors , and pH . Temperature affects enzyme rates because a higher temperature allows for a higher kinetic ebergy , which creates a faster reaction . However , if the temperature is too high the reaction will no longer occur because the enzyme becomes denatured . The highest temperature for the enzyme is called the optimum temperature . Cofactors affect enzyme reaction because some enzymes will not show full activity unless they interact with other molecules . Lastly , pH affects enzyme reaction because pH affects the ionic bonds , but the enzymes work best at optimal pH .
Enzymes ! My question is :
What processes require enzymes to work ? Explain :) .
 

Hey Fe
good job,
i liked the part about...
"However , if the temperature is too high the reaction will no longer occur because the enzyme becomes denatured . The highest temperature for the enzyme is called the optimum temperature"

the terms denature and optimum are important.

this is an addition... not a correction... i would call "cofactors" CoEnzymes, and the concentration of substrate also has an affect on reaction rate. graph Re: substrate cocentration
 

CH3... you fended the question well. the field of evolutionary biology is a bit splintered... you could ask the same question to 5 people and get five different answers. I was just glad you didn't name me the oldest fossil !
lol
 

Many processes require enzymes to work. The process of digestion requires enzymes to break bown foods iinto carbohydrates, sugars, and other chemicals to aid in cell respiration. Cell respiration also requires enzymes to break down the sugars into energy (ATP) in the mitochondria.
Click HereHow does the human endocrine system function?
 

The human endocrine system functions with the use of lots of hormones. The endocrine system secretes or generates and separates different types of hormones which control our bodily functions. So basically it watches over all our bodily functions to make sure it all works properly. Some glands in the endocrine system are the Pituitary gland, Thyroid gland, Parathyroid glands, Adrenal glands, and a couple others. My question is why is the liver so important in our body?
it’s the liver mr j!!
 

The liver is so important to our body for many reasons. One reason is that it excretes many harmful chemicals. This is very important so we don’t die, basically. Another reason it’s so important is that it stores fats, sugars, iron, and vitamins for the body to use later on. The liver also produces bile to break down foods. the liver has another important job, it builds proteins, which are essential to living things. My question is what are the stages of mitosis?


mitosis
 

the stages of mitosis are Interphase, prophase, metaphase, anaphase, telophase. interphase is the cell cycle in which the nucleus is not undergoing division. prophase is the first stage of mitosis in eukaryotic cell division, during which the nuclear envelope breaks down and strands of chromatin form into chromosomes. metaphase is the stage in mitosis in which the duplicated chromosomes line up along the equatorial plate of the spindle. Anaphase is the stage in mitosis following metaphase in which the daughter chromosomes move away from each other to opposite ends of the cell. Telophase is the final stage of meiosis, in which the separated chromosomes reach the opposite poles of the dividing cell and the nuclei of the daughter cells form around the two sets of chromosomes.

my question is what are the differences between diffusion and osmosis?


osmosis vs. diffusion
 

The differnce between omosis and diffusion is..
Diffusion is the movement of molecules or particles from an area of greater concentration to an area of lesser concentration.
Osmosis is the diffusion of water across a semipermeable membrane from a region of high concetration of water to a region of low concentration of water.

What are the five types of joints in our bodies?
Joints
 

melting m... every chemical reaction in our body requires enzymes to function at a speed and a temp that we can "live with"... this year we studies... dehydration synthesis, hydrolysis, aerobic and anaerobic respiration, and photosynthesis.... but the list is "endless"
 

....and candy girl.... key words for the endocrine function are: regulation, feedback, and homeostasis
:)
 

ATP... the liver stores glyogen, does all our detox, breaksdown old RBC's, and produces urea...it is by the way...way better than that other nameless feb 14th hallmark organ
:)
 

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The five types of joints in our body are the fixed joints, ball and socket joint, hinge joint, gliding joint, and a pivot joint. Joints are where two bones meet and the bones do not have to move.

What is the process of respiration in humans?
Human Respiration
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The process of human respiration is done to obtain oxygen. During respiration oxygen is let into the lungs and carbon dioxide is let out.

How is photosynthesis done in plants?
 

Photo to the Synthesis
 

oh and i did the blog for last week yesterday mistur j
 

Photosynthesis is done in plants by sunlight,water and carbon dioxide. The sunlight enters the chloroplast where it is harvested. Water enters through the xylem. Then that energy is used to split the water(photolysis). Oxygen is then released through the stomate as the hydrogen enters the dark reaction by NADP. CO2 then enters through the stomate and joins with the hydrogen to form water and glucose.

sodium pumpMy question is what is the sodium pump and how is it important?
 

Photosynthesis is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce sugar, which cellular respiration converts into ATP. The conversion of unusable sunlight energy into usable chemical energy, is associated with the actions of the green pigment chlorophyll.

Excreation!What do the organs of excreation get rid of?
 

UGHHH. I HAVE TO DO IT AGAIN BECAUSE SHE POSTED HER'S 3 MINUTES BEFORE ME.


The sodium pump is a mechanism of active transport that moves potassium ions into and sodium ions out of a cell along a protein,or enzyme channel. It is found in all human cells, but is especially important in nerve and muscle cells.

What do the organs of excreation get rid of?

EXCREATION.
 

Excretion is the removal of toxic byproducts of metabolism. This would get rid of ammonia, urea, and uric acid. These wastes are nitrogen wastes made through the metabolism of proteins. The lungs, kidneys, liver and skin are organs of excretion.

What are the three types of neurons, what they're connected to and how they work?


Neurons
 

no court-tttttttttt
you were probably working on it at the same time (i checked the times)
you are fine w/ your entry as it is.
now go study for the test tomorrow!
...and i know i owe the class a lollipop.
:)
hj
 

Neurons are otherwise known as nerves cells and are the basic structures in the nervous systems of all multicellular animals. They can send electrical and chemical impulses. A nerve cell is normally made up of three basic parts: a cell body, dendrites, and an axon. The cell body contains the nucleus and the cell organelles. The dendrites are short, highly branched fibers, the receive impulses. The axon is a long, thin fiber that extends from the cell body. They carry impulses away from the cell body, sending them either to other neurons or effectors.

Staying within the nervous regulation topic...

What are nerves and three types of neurons.

OVER HERE!
 

DeeCeeThree
the organs of excretion ( lungs, skin, kidney) also get rid of xcess H2O, and CO2...
but your definition sounded like something i would say
:)
 

Gabster, your definition of neuron parts is great, but the question asked you to name the 3 types of neurons... and you passed that question to the next person... but OK.... do well on the test.
study study study!
hj
 

Nerves are bundles of axons and dendrites covered by a myelin sheath. They relay signals to the brain. The three types of neurons are sensory neurons, which carry impulses to the spinal cord, Motor neurons carry impulses form the brain to the muscles and Interneurons which relay impulses from one neuron to another.

How does an impulse cross a synapse?
SYNAPSE!!!!
 

Hey Mr. Johnson, I hope your surgery went well! Feel Better!
 

thanks for the wishes cookie.
all seems well at ths minute.
:)
hj
 

Glad to hear you are doing good. Hope that is still true.

A stimlulus is the spot where the impulse begins. The impulse travels through between neurons and synapses. The synapse is the place between the terminal branch of one neuron and the cell membrane o the next. The transmisiion of impulses across the synaptic gap is a chemical process. Within this is the synaptic vesicles that contian neurotransmitters. When an impulse reaches the synaptic knob, some neurotransmitters are released into the gap. They diffusse across the gap and start impulses in the next nerve cell by changing the permibility of its membrane, To do this, the neurotransmitters reat with special receptor proteins in the membrane of the dendrites.
Click HereHow do spores form?
 

(You where supposed to post a link to the question you were asking...but alright) Most spores are formed from different plants. An example of a spore forming organism would also be a fungi. They are formed by process of Meiosis in certaint parts of the plant or fungi.

Whats the difference between a diploid and a monoploid cell?
 

http://www.springerlink.com/content/mk4478466366u7j1/


Link
 

Diploid cells make up the majority of one's body and contains the usual number of chromosomes. Monoploid cells are sex cells, such as sperm and egg, which contain half of the usual number of chromosomes.

What are some differences between DNA and RNA?

This Link Is Very Helpful In Answering My Question
 

And Mr. Johnson, I also wanted to tell you I hope you're soing well.
 

I meant doing, not soing.
 

Some difference betwween RNA and DNA are DNA is a medium of long-term storage and transmission of genetic information. RNA acts as a messenger between DNA and the protein synthesis complexes known as ribosomes. DNA is a long polymer with a deoxyribose and phosphate backbone and four different bases: adenine, guanine, cytosine and thymine. RNA is a polymer with a ribose and phosphate backbone and four different bases: adenine, guanine, cytosine, and uracil. There is one type of DNA and three types of RNA, mRNA, tRNA, and rRNA.

My question is what are some functions of different parts of the heart?

Click Here
 

thanks for the wishes calvin, and you also milgarten. trust me when i say i would much rather have been in room 296 w/ all of you.
A1, hope you are ready to hassle me about my newest accessory!
:)
hj
 

The right side of the heart receives de-oxygenated blood from body tissue through the inferior and superior Vena Cava. The blood is then passed from the right atrium through the tricuspid valve into the right ventricle. Blood is then pumped into the lungs from the pulmonary artery. The left side of the heart receives oxygenated blood from the lungs through the pulmonary veins into the left atrium. The blood passes in to the left ventricle via the bicuspid valve. The blood then leaves the heart through the aorta is moved to other parts of the body.

LINK What causes diabetes?




FEEL BETTER HJ!!! :)
 

1. Inhereted traits, age, poor diet, obesity, sedentary lifestyle, stress, drugs, infection, sex, hypertension, and serumlipids cause diabetes. All of these factors are causes of type 1 and type 2 diabetes.
2. What are the steps of mitosis?
Mitosis
 

the steps of mitosis are Prophase ,Metaphase, Anaphase, and Telophase

What is the difference between RNA and DNA?
 

Both DNA and RNA are composed of repeating units of nucleotides. Each
nucleotide consists of a sugar, a phosphate and a nucleic acid base.
The sugar in DNA is deoxyribose. The sugar in RNA is ribose, the same
as deoxyribose but with one more OH, which would be the biggest differrence between RNA and DNA.RNA has uracil where DNA has thymine.

explain the steps of DNA replication?

feel better MRj.

Click Here
 

good star trek movie huh!
:)
hj
 

mr hicks... do you have a visa to be in this class? besides... you repeated a question.
hj
 

JOHNSON! haha youre right ! sorrry i just realized this NOW
hope your surgery went well, FEEEL BETTER :]
 

In response to Lima's question:
The first step for DNA replication is the 'unzipping' of the two nonparallel strands and the breaking of the hydrogen bonds. After that comes the binding of the RNA primase in the parent chain. In the next step, the gaps between the nucleotides are closed with the action of DNA polymerase. The last step is termination. This happens when the Polymerase reaches an end of the strands.

Question: What role does the Mesoderm, Endoderm, and Ectoderm eventually play? How do they develop?
Ectoderm, Mesoderm and Endoderm
 

those three membrains eventualy turn int ot the skelatol, digestive and skin of the organism.


Q: What is the first stage of pregnancy?
Click Here
 

Sorry only wrote two sentrnces.
the mesoderm turns into the skelatol and muscle system.
the endoderm turns into the digestive system.
the ectoderm turns into the skin.