Another Biology Assignment

Last week, Our biology teacher, Ms Tya, asked us to make a mind mapping about HUMAN REPRODUCTIVE SYSTEM.

 The mind mapping was graded by looking at the neatness, use of images, use of colour(s), and the understanding about the topic.

And these are the results

Hope you can see it clearly, and if you have any question(s), feel free to ask us :)

Second lesson: What are the causes of infertility?

We learned about the causes of infertility this week. For men,  it’s caused by abnormal sperm and absence of sperm. While in women, it’s caused by Ovulatory disorders, endometriosis, oviduct blockage and antisperm antibodies.

The abnormal sperm is a condition when the sperm cannot swim properly, while absence of sperm is a condition where semen contains very few sperm, It is can be caused by incomplete development of teste or infection like chlamydia. 

For women, the ovulatory disorders happen when the ovulation is rarely happens or it doesn’t happen at all. Abnormal menstruation cycle is one of the causes of this disorder.

Endometriosis is a condition where some tissues are also found in the oviducts and cause it to be blocked. Them, oviduct blockage happens when the pviducts become blocked by infections that caused the ovaries to stick to each other. Some women develop immune system response to their men’s sperm. The body response is to destroy the sperm so the sperm cannot reach the egg.

That’s why it’s important to maintain our reproductive organ’s health, for example by  avoiding pre marrige sex.

Intermezzo; biology jokes

The following is a true story about an anatomist. 

One day after sleeping badly, an anatomist went to his frog laboratory and removed from a cage one frog with white spots on its back. He placed it on a table and drew a line just in front of the frog. "Jump frog, jump!" he shouted. The little critter jumped two feet forward. In his lab book, the anatomist scribbled, "Frog with four legs jumps two feet." 

Then, he surgically removed one leg of the frog and repeated the experiment. "Jump, jump!" To which, the frog leaped forward 1.5 feet. He wrote down, "Frog with three legs jumps 1.5 feet." 

Next, he removed a second leg. "Jump frog, jump!" The frog managed to jump a foot. He scribbled in his lab book, "Frog with two legs jumps one foot." 

Not stopping there, the anatomist removed yet another leg. "Jump, jump!" The poor frog somehow managed to move 0.5 feet forward. The scientist wrote, "Frog with one leg jumps 0.5 feet." 

Finally, he eliminated the last leg. "Jump, jump!" he shouted, encouraging forward progress for the frog. But despite all its efforts, the frog could not budge. "Jump frog, jump!" he cried again. It was no use; the frog would not response. The anatomist thought for a while and then wrote in his lab book, "Frog with no legs goes deaf."


source taken from : http://answers.yahoo.com/question/index?qid=20090112000754AALUFAH http://www.jupiterscientific.org/sciinfo/jokes/biologyjokes.html

First lesson: ATP

Learning outcomes: 1. Able to explain how ATP release its energy

                                2. What ATP stands for

                                3. The structures that builds up an ATP

Do you guys have in mind what ATP stands for? 

You might know what ATP stands for after I give a brief explanation of what are the structures of ATP.

ATP is an energy currency, since it acts only as the currency of energy it can't be used directly to give us energy. So how can ATP release its energy then? In ATP, it consists of 3 phosphate groups. They are binded together in a covalent bond and ester linkages. For the energy to be released, the bond between the second and third phosphate needs to be broken since there's a high energy bond between them. As the bond is broken, the cell can uses its energy! 

At the centre of ATP, ribose (its the sugar that makes up RNA). Attached to one side of this is a base called adenine. The adenine base and sugar ribose form together and we call it adenosine.

So, in conclusion, ATP is mainly made from 3 parts which is ribose, adenine (both form adenosine) and the last is 3 phosphate group. Bases on the parts that made this energy currency, we can call it by ATP which stands for adenosine triphosphate. 

Does it makes sense now why its called ATP? 

Lets look back at the 3 learning outcomes, based on the explanation above we have succeed to fulfill all the learning outcomes. Yay, I've learnt a lesson about ATP today :)

Let's wait for the other lesson, cheers!