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Bài viết của Lê Thị Khánh Huyền

Mendel’s Experiments and the Laws of Probability

Johann Gregor Mendel is considered the father of genetics. Johann Gregor Mendel (1822–1884) ([link]) was a lifelong learner, teacher, scientist, and man of faith. As a young adult, he joined the Augustinian Abbey of St. Thomas in Brno in what is now the ...

Tác giả: Lê Thị Khánh Huyền viết 15:02 ngày 25/05/2018 chỉnh sửa

Muscle Contraction and Locomotion

Muscle cells are specialized for contraction. Muscles allow for motions such as walking, and they also facilitate bodily processes such as respiration and digestion. The body contains three types of muscle tissue: skeletal muscle, cardiac muscle, and smooth ...

Tác giả: Lê Thị Khánh Huyền viết 15:01 ngày 25/05/2018 chỉnh sửa

Simple Machines

Simple machines are devices that can be used to multiply or augment a force that we apply – often at the expense of a distance through which we apply the force. The word for “machine” comes from the Greek word meaning “to help make things ...

Tác giả: Lê Thị Khánh Huyền viết 15:01 ngày 25/05/2018 chỉnh sửa

Religion in the United States

In examining the state of religion in the United States today, we see the complexity of religious life in our society, plus emerging trends like the rise of the megachurch, secularization, and the role of religion in social change. Religion has ...

Tác giả: Lê Thị Khánh Huyền viết 15:00 ngày 25/05/2018 chỉnh sửa

Gross Anatomy of Urine Transport

Rather than start with urine formation, this section will start with urine excretion. Urine is a fluid of variable composition that requires specialized structures to remove it from the body safely and efficiently. Blood is filtered, and the filtrate is ...

Tác giả: Lê Thị Khánh Huyền viết 15:00 ngày 25/05/2018 chỉnh sửa

Accuracy, Precision, and Significant Figures

A double-pan mechanical balance is used to compare different masses. Usually an object with unknown mass is placed in one pan and objects of known mass are placed in the other pan. When the bar that connects the two pans is ...

Tác giả: Lê Thị Khánh Huyền viết 15:00 ngày 25/05/2018 chỉnh sửa

Prokaryotic Cell Division

Prokaryotes, such as bacteria, propagate by binary fission. For unicellular organisms, cell division is the only method to produce new individuals. In both prokaryotic and eukaryotic cells, the outcome of cell reproduction is a pair of daughter cells that are ...

Tác giả: Lê Thị Khánh Huyền viết 15:00 ngày 25/05/2018 chỉnh sửa

Quantum Numbers and Rules

Physical characteristics that are quantized—such as energy, charge, and angular momentum—are of such importance that names and symbols are given to them. The values of quantized entities are expressed in terms of quantum numbers , and the rules governing ...

Tác giả: Lê Thị Khánh Huyền viết 15:00 ngày 25/05/2018 chỉnh sửa

Neurons and Glial Cells

Nervous systems throughout the animal kingdom vary in structure and complexity, as illustrated by the variety of animals shown in [link]. Some organisms, like sea sponges, lack a true nervous system. Others, like jellyfish, lack a true brain and instead have a ...

Tác giả: Lê Thị Khánh Huyền viết 15:00 ngày 25/05/2018 chỉnh sửa

Metabolism without Oxygen

In aerobic respiration, the final electron acceptor is an oxygen molecule, O 2 . If aerobic respiration occurs, then ATP will be produced using the energy of high-energy electrons carried by NADH or FADH 2 to the electron transport chain. If aerobic ...

Tác giả: Lê Thị Khánh Huyền viết 15:00 ngày 25/05/2018 chỉnh sửa