Cell Biology: An Overview of Cell Structure, Function, and Division
Similarities and Differences Between Prokaryotic, Eukaryotic, and Animal/Plant Cells
Eukaryotic Cells:
- Nucleus is distinct, it is covered up by the nuclear membrane.
- It has double-membraned organelles, like chloroplasts, mitochondria, or nucleus.
- It also has single-membraned organelles such as golgi body, lysosomes, or vacuoles.
- Ribosomes → 80 subunits.
- Different compartments.
Prokaryotic Cells:
- Nucleus is not distinct as it is not covered up by a membrane. It is called nucleoid.
- It only has single-membraned
Anatomy of the Face, Axilla, Hand, and Thorax: Nerves, Blood Vessels, and Regions
Face: Regions, Blood Vessels, and Nerves
Regions
- Forehead: Frontal bone + frontal eminence & glabella
- Nasal Region: Nasal apparatus formed by nasal bones & cartilage
- Periorbital Region: Maxilla + zygomatic bone
- Perioral & Chin: Surround the mouth, mandibular bone & maxilla
- Oral Region: Orifice of mouth, upper & lower lip
Nerves
All Are Cranial Nerves
I. Sensory
- Trigeminal nerve separates into 3 branches before leaving the middle cranial fossa.
- Ophthalmic nerve (V1): Scalp & forehead,
Genetics: The Study of Inheritance and Variation
Introduction
Genetics is the study of inheritance and variation in living organisms. It seeks to understand how traits are passed down from parents to offspring and how these traits vary within a population.
Basic Concepts
Genes and Alleles
Genes are units of heredity that determine an organism’s traits. Each gene has two copies, called alleles, which can be identical or different.
Dominance and Recessiveness
When an organism has two different alleles for a gene, one allele may be dominant and the other
Read MoreCell Biology: Exploring the Fundamentals of Life
Chapter 2: Chemical Foundations of Life
Key Concepts
- Hydrogen bond: Weak attraction between a hydrogen atom and another atom.
- Cohesion: Attraction between molecules of the same substance.
- Adhesion: Attraction between molecules of different substances.
- Mixture: Material composed of two or more elements or compounds, physically mixed but not chemically combined.
- Solution: Mixture where components are evenly distributed.
- Solute: Substance that is dissolved in a solution.
- Solvent: Dissolving substance in a
Evolution: A Comprehensive Guide to the Mechanisms and Processes of Change
Introduction
Evolution is the process by which organisms change over time. It is a fundamental concept in biology and has been studied for centuries. In this guide, we will explore the mechanisms and processes of evolution, from the smallest changes in DNA to the formation of new species.
Levels of Evolution
Evolution can occur at different levels, from the individual to the entire species.
1. Adaptation
Adaptation is the process by which organisms become better suited to their environment. This can
Read MoreThe Ultimate Guide to Skincare, Haircare, and Body Anatomy
Skin
Identifying Your Skin Type
To identify your skin type, follow a simple routine:
- Wash your face to remove makeup, oil, and dirt, allowing your skin to refresh.
- After a two-hour wait without applying any products, observe your skin’s natural state to determine its type.
Levels of each skin type may vary. You could be on the drier side of dry or the normal side of oily.
Normal Skin
Normal skin is neither flaky nor oily, feeling smooth and balanced. It’s often envied for its effortless condition. Lightweight
Read More