Divided attention
Eye- The eyeball is the spherical organ of sight. Its diameter of about 2.5cm. It lies in a bony cavity within the facial skeleton known as the bony orbit. The anterior one- sixth is much more convex than the posterior part.
Anatomically, the eyeball divided into 3 parts;
Fibrous or outer coat. Vascular or middle coat. Nervous or inner coat.
1. Fibrous coat: The fibrous layer of the eye is the outermost layer. It is posteriorly formed by the sclera and anteriorly by cornea. Their main functions
Read MoreRed Winemaking Process: From Grape to Glass
Red Winemaking:
The process of red winemaking involves fermenting the wort (grape juice) with the solid parts of the harvest (skins and seeds). This extraction process imparts color, flavor, and mouthfeel to the wine.
Operations Before Vinification:
Collection and Transport:
Harvesting grapes carefully is crucial to ensure the clusters arrive intact and prevent premature fermentation. Here’s how:
- Minimize transfers.
- Prevent grapes from being crushed.
- Use easy-to-clean containers to avoid contamination.
The Fundamentals of Genetics: From Cells to Inheritance
Cellular Reproduction
Definition
The process by which cells divide to produce new cells.
Types
- Mitosis: Division of a parent cell into two genetically identical daughter cells, typical for somatic cells.
- Meiosis: Division process that reduces the chromosome number by half, resulting in four haploid cells, typical for germline cells.
Genome
Definition
The complete set of DNA, including all of its genes, in an organism.
Key Points
- Contains all the information necessary for the structure, function, and regulation
Placenta and Fetal Development: A Comprehensive Guide
Placenta Formation
The placenta is a vital organ that develops during pregnancy to facilitate the exchange of nutrients, oxygen, and waste products between the mother and the developing fetus. The journey begins even before implantation.
The fertilized egg, called a blastocyst, contains an outer layer of cells called trophoblasts. These are the key players in placenta formation.
Early Development (Week 1-3)
Implantation: Around 7-10 days after fertilization, the blastocyst implants in the uterine lining.
Read MoreBiochemistry Basics and Key Concepts
1. Cellular Respiration
Glycolysis
- Formula: C6H12O6 + 2 NAD+ + 2 ADP + 2 Pi → 2 C3H4O3 (pyruvate) + 2 NADH + 2 ATP + 2 H2O + 2 H+
- Key Points:
- Occurs in the cytoplasm.
- Glucose (6C) → 2 Pyruvate (3C).
- Net gain of 2 ATP and 2 NADH.
Citric Acid Cycle (Krebs Cycle)
- Formula: Acetyl-CoA + 3 NAD+ + FAD + ADP + Pi + 2 H2O → 2 CO2 + 3 NADH + 3 H+ + FADH2 + ATP + CoA
- Key Points:
- Occurs in the mitochondrial matrix.
- For each Acetyl-CoA, 2 CO2, 3 NADH, 1 FADH2, and 1 ATP are produced.
Electron Transport Chain (ETC)
Read MoreThe Digestive System: A Comprehensive Guide to How Your Body Processes Food
The Digestive System: A Comprehensive Guide
Enzymes: The Body’s Chemical Facilitators
Enzymes are proteins that act as catalysts, speeding up chemical reactions within our bodies. They play a crucial role in metabolism, breaking down food molecules into smaller units that our bodies can absorb and utilize. Here’s a closer look at enzymes and their functions:
- Hydrolytic Enzymes: These enzymes use water to break down chemical bonds in food molecules. For example, pepsin, an enzyme found in the stomach,