Essential Concepts in Human Health, Genetics, and Nutrition

1. The Mediterranean Diet

The Mediterranean diet is considered highly healthy because it provides a wealth of fiber-rich carbohydrates, essential vitamins, and healthy fats derived from olive oil and fish.

2. Understanding the Influenza Virus

a) Viral Infections

The flu is a viral infection that causes annual epidemics.

b) Viral Mutation

The human influenza virus is constantly changing due to the accumulation of genetic mutations. When these mutations alter the surface molecules of the virus, the antibodies previously produced by our body cannot neutralize the new variant.

c) Antigenic Shifts

Every few decades, the human influenza virus acquires drastic changes. When this occurs, the resulting virus possesses completely new antigens against which there is no prior immunity in the population.

3. Genetic Disorders

a) Somatic vs. Inherited Conditions

Diseases caused by abnormalities in genetic information are not inherited if they affect only somatic cells.

b) Types of Genetic Disorders

• Chromosomal: Result from problems affecting entire chromosomes or chromosome fragments.
• Monogenic: Caused by changes in a single gene and inherited like any other trait.

Key Biological and Medical Definitions

• Health: A state of complete physical, mental, and social well-being, not merely the absence of disease or infirmity.
• GM Food: Food derived from or produced with the help of genetically modified organisms.
• Cloning: The process of obtaining an identical copy of a living entity from a genetic standpoint.
• Infarction: A blocked artery that prevents blood supply to an area of the heart, causing the death of affected cells.
• Good Cholesterol (HDL): Cholesterol traveling in high-density lipoproteins toward the liver, where it is destroyed.
• Complementary DNA (cDNA): A single-stranded DNA molecule.
• Amniocentesis: The sampling of amniotic fluid containing fetal cells in suspension using a hypodermic needle.
• In Vitro Fertilization and Embryo Transfer (IVF-ET): A process where an egg is fertilized by sperm outside the woman's body in a laboratory.

IVF-ET Procedure Steps

1. Obtaining Eggs: Hormone treatment stimulates the ovaries to produce eggs.
2. Fertilization: Ova are fertilized by sperm in a test tube within the laboratory.
3. Transfer of Embryos: The resulting embryos are inserted into the woman's uterus.