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Bài viết của Lê Thị Khánh Huyền

Bernoulli’s Equation

When a fluid flows into a narrower channel, its speed increases. That means its kinetic energy also increases. Where does that change in kinetic energy come from? The increased kinetic energy comes from the net work done on the fluid to push it into the channel ...

Tác giả: Lê Thị Khánh Huyền viết 15:14 ngày 25/05/2018 chỉnh sửa

Disruptions in the Immune System

A functioning immune system is essential for survival, but even the sophisticated cellular and molecular defenses of the mammalian immune response can be defeated by pathogens at virtually every step. In the competition between immune protection and pathogen ...

Tác giả: Lê Thị Khánh Huyền viết 15:14 ngày 25/05/2018 chỉnh sửa

Ethical Concerns

Sociologists conduct studies to shed light on human behaviors. Knowledge is a powerful tool that can be used toward positive change. And while a sociologist’s goal is often simply to uncover knowledge rather than to spur action, many people use ...

Tác giả: Lê Thị Khánh Huyền viết 15:14 ngày 25/05/2018 chỉnh sửa

Oxidation of Pyruvate and the Citric Acid Cycle

If oxygen is available, aerobic respiration will go forward. In eukaryotic cells, the pyruvate molecules produced at the end of glycolysis are transported into mitochondria, which are the sites of cellular respiration. There, pyruvate will be transformed into ...

Tác giả: Lê Thị Khánh Huyền viết 15:13 ngày 25/05/2018 chỉnh sửa

Medical Imaging and Diagnostics

A host of medical imaging techniques employ nuclear radiation. What makes nuclear radiation so useful? First, γ size 12{γ} {} radiation can easily penetrate tissue; hence, it is a useful probe to monitor conditions inside the body. Second, ...

Tác giả: Lê Thị Khánh Huyền viết 15:12 ngày 25/05/2018 chỉnh sửa

Animal Phylogeny

Biologists strive to understand the evolutionary history and relationships of members of the animal kingdom, and all of life, for that matter. The study of phylogeny aims to determine the evolutionary relationships between phyla. Currently, most biologists ...

Tác giả: Lê Thị Khánh Huyền viết 15:12 ngày 25/05/2018 chỉnh sửa

Archimedes’ Principle

When you rise from lounging in a warm bath, your arms feel strangely heavy. This is because you no longer have the buoyant support of the water. Where does this buoyant force come from? Why is it that some things float and others do not? Do objects that sink ...

Tác giả: Lê Thị Khánh Huyền viết 15:12 ngày 25/05/2018 chỉnh sửa

The Mental Status Exam

In the clinical setting, the set of subtests known as the mental status exam helps us understand the relationship of the brain to the body. Ultimately, this is accomplished by assessing behavior. Tremors related to intentional movements, incoordination, or the ...

Tác giả: Lê Thị Khánh Huyền viết 15:12 ngày 25/05/2018 chỉnh sửa

Embryonic Development of the Axial Skeleton

The axial skeleton begins to form during early embryonic development. However, growth, remodeling, and ossification (bone formation) continue for several decades after birth before the adult skeleton is fully formed. Knowledge of the developmental processes ...

Tác giả: Lê Thị Khánh Huyền viết 15:12 ngày 25/05/2018 chỉnh sửa

Synthesis of Biological Macromolecules

As you’ve learned, biological macromolecules are large molecules, necessary for life, that are built from smaller organic molecules. There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids); each is ...

Tác giả: Lê Thị Khánh Huyền viết 15:12 ngày 25/05/2018 chỉnh sửa