Antibiotics in Dentistry: Usage, Classification, and Mechanisms
Antibiotics in Dentistry
Antibiotics are naturally occurring, artificial, or microorganism-derived substances that can stop or destroy bacteria, fungi, and protozoa. Dr. Fleming discovered penicillin in 1929, marking the first antibiotic used. Initially, all antibiotics were natural. Later, semi-synthetic and synthetic antibiotics were developed by transforming original molecules to enhance pharmacological advantages.
Mechanisms of Action
Inhibition of cell wall synthesis enzymes (murein).
Alteration
Human Biology and Physiology
1. Nutrition and Digestion
a) Devices Involved in Nutrition
The digestive, circulatory, respiratory, and excretory systems are involved in the process of nutrition.
b) Accessory Glands and Secretions
Accessory glands in the digestive system include:
- Salivary glands (saliva)
- Liver (bile)
- Pancreas (enzymes)
2. Mechanical and Chemical Digestion
a) Differences and Importance
Mechanical digestion involves physically breaking down food into smaller pieces, mixing it with digestive juices like saliva, and preparing
Read MoreUnderstanding Human Diseases: Types, Defenses, and Treatments
Noninfectious Diseases
These diseases affect the body’s organ systems. They can be categorized as:
- Inherited or Genetic Diseases: Passed down from parents, often chronic (e.g., diabetes, hemophilia).
- Mental Diseases: Cause abnormal personality disorders (e.g., neurosis, schizophrenia). Treatment may involve psychotropic drugs, therapy, and support.
- Specific Organ/System Diseases: Affect particular organs or body systems, such as the digestive, circulatory, nervous, musculoskeletal, endocrine, or sensory
Human Biology: Systems and Processes
Exam 2 Review
Chapter 8: Circulatory System
Arteries and Veins
Arteries carry blood away from the heart, usually carrying deoxygenated blood (except for the pulmonary artery). The largest artery is the aorta.
Veins carry blood towards the heart, usually carrying deoxygenated blood (except for the pulmonary vein). The largest vein is the vena cava.
Blood Flow Path
- Superior Vena Cava: Blood enters the heart from the upper body.
- Right Atrium: Blood flows into the right atrium.
- Tricuspid Valve: Blood passes
Biotechnology and Recombinant DNA Technology: Techniques and Applications
Biotechnology
For thousands of years, humankind has used microbial fermentation processes to obtain useful products. Modern biotechnology implies the deliberate manipulation of the genetic material of living organisms to make or modify a product, improve animals or plants, or develop microorganisms with specific skills for specific uses. The process of modern biotechnology requires understanding the mechanisms governing the decoding and expression of the information contained in genes and the development
Read MorePlant Classification, Structure, and Ecology
Plant Classification
Plants are classified into three main groups:
- Bryophyta (mosses and liverworts): These inhabit moist environments and depend on water for reproduction. They do not produce flowers or seeds.
- Pteridophyta (ferns and horsetails): These have independent vessels for water transport. Their leaves and roots, known as fronds, contain spores involved in asexual reproduction. They do not produce fruits or seeds.
- Spermatophyta (seed-producing plants): This group includes all flowering plants