Understanding the Human Immune and Respiratory Systems
Innate and Adaptive Immunity
What is Immunity?
1. Innate immunity refers to the body’s natural defense mechanisms that are present from birth and provide immediate, non-specific protection against pathogens. Adaptive immunity, on the other hand, is a specific immune response that develops over time as the body encounters and recognizes specific pathogens.
What is a Pathogen?
2. A pathogen is a disease-causing microorganism, such as bacteria, viruses, fungi, or parasites.
Barriers of Innate Immunity
3.
Read MoreCarbohydrates, Polysaccharides, and Biological Membranes
Sept. 05 – B1OA
Carbohydrates
The simplest carbohydrates are composed of a molecule or monomer and are called monosaccharides. These are solid, white, crystalline, very soluble in water but insoluble in nonpolar solvents. Most of them have a sweet taste. They consist of a single unit of polyhydroxyaldehyde or polyhydroxyketone and have the empirical formula (CH2O)n, where n = 3 to 8. The carbon skeleton of the current monosaccharides is branched, and all carbon atoms except one have a hydroxyl group
Read MorePhotosynthesis: The Process of Converting Light Energy into Chemical Energy
Photosynthesis
Photosynthesis is a complex process by which living photoautotrophs capture solar light energy and transform it into chemical energy (ATP) and reducing power (NADPH). They then transform water and carbon dioxide into reduced organic compounds (glucose), releasing oxygen.
This process is conducted in the chloroplasts.
Photosynthetic Pigments
Substances that absorb light are the pigments found in chloroplast thylakoid membranes.
Pigments are molecules that contain a chemical group capable
Read MoreModern Art Movements: A Comprehensive Guide
Modern Art Movements
Abstract Expressionism (1940s-1950s)
This American painting movement, centered in New York, is characterized by large canvases, an all-over technique, and varying degrees of abstraction used to convey emotions and ideas.
Neo-Dada (1950s-1960s)
Artists like Robert Rauschenberg and Jasper Johns explored themes of paradox and ambiguity, incorporating found objects and everyday materials into their works. Their art often blurred the lines between painting and sculpture.
Pop Art (1960s)
Read MoreMechanical Ventilation Modes and Settings
Mechanical Ventilation Modes
Volume Assist/Control Ventilation (A/C)
- Delivers a preset number of breaths at a preset tidal volume (VT).
- When the patient initiates a spontaneous breath, the preset VT is delivered (VT does not vary).
- The ventilator performs most of the work of breathing (WOB).
- Useful in patients with normal respiratory drive but are weak or unable to exert adequate WOB.
- Risk of hyperventilation and respiratory alkalosis.
Pressure Ventilation (P-A/C)
- The ventilator delivers air until a preset
Understanding Antioxidants: Types, Uses, and Safety
Understanding Antioxidants
What are Antioxidants?
Antioxidants are substances added to foods to prevent spoilage and maintain quality. They work by slowing down the oxidation process, which can cause rancidity, discoloration, and loss of nutrients. Antioxidants also help prevent the formation of harmful compounds that can negatively impact health.
Benefits of Antioxidants in Food:
- Prevent rancid odor and flavor
- Maintain color and texture
- Preserve nutritional value
- Prevent formation of harmful compounds