Glass Ionomer Cements (GICs) in Dentistry: Properties, Uses, and Advantages
Glass Ionomer Cement (GIC) in Dentistry
Introduction
Glass Ionomer Development (Silicate Cement): This material had relatively high solubility in the mouth, poor abrasion resistance, significant surface and marginal staining, no marginal seal, low initial pH, and was considered a severe pulp irritant. It generally had a short clinical service life.
ASPA (Alumino-Silicate Polyacrylic Acid): This was the first commercial GIC product. It combined the benefits of silicates (translucency and fluoride release)
Read MoreControl and Coordination in Complex Animals: Nervous & Endocrine Systems
Control and Coordination in Living Beings
The Nervous System
The response a living being makes to external stimuli is called control and coordination. The nervous system is primarily responsible for this in complex animals.
Components of the Nervous System
The nervous system comprises the brain, spinal cord, and nerves. The five sense organs (nose, eyes, ears, tongue, and skin) are also integral parts of the nervous system, playing a crucial role in its function.
Functions of the Nervous System
- Receives
Understanding Viruses: Structure, Classification, Replication, and Diseases
Structure and Composition of Viruses
Viruses are considered agents on the frontier of life. They are not cells, lack independent movement and feeding, and cannot reproduce on their own. They are smaller than bacteria and are considered distinct from any living being. They are a unique kingdom, separate from other kingdoms like bacteria.
A virus’s structure consists of two main components:
- Capsid: A protein structure made up of small pieces called capsomeres. This protects the genetic material.
- Genetic
Physiology Notes: From B Lymphocytes to the Auditory Cortex
Activation of B lymphocytes
2. Describe the absorption, function and effect of deficiency of vitamin B12
Absorption: It is absorbed in the lower ileum. Its absorption needs intrinsic factor secreted by the stomach. The intrinsic factor binds the vitamin and together they bind to specific receptorsthe the vitamin is absorbed by endocytosis. It is stored in the liver.Function: It is essential for the synthesis of DNA and maturation of RBCs. It is important for the formation of myelin sheath.
Deficiency:
Cellular Respiration: How Cells Harvest Energy
Biology 112 – Chapter 6 Notes
How Cells Harvest Chemical Energy
I. Introduction to Cellular Respiration
A. Energy is Necessary for Life Processes
- Photosynthesis and cellular respiration provide energy for life.
- Energy in sunlight is used in photosynthesis to make glucose from CO2 and H2O with the release of O2.
- Other organisms, through cellular respiration, use the O2 and energy in sugar and release CO2 and H2O.
- Together, these two processes are responsible for the majority of life on Earth.
- Photosynthesis
- This
Cellular Transport and Oxidative Respiration: A Comprehensive Overview
Cell Transport Mechanisms
What are the different types of transport across cell membranes?
Cell transport refers to the movement of substances across the cell membrane. This process is essential for various cellular functions, including nutrient uptake, waste removal, and maintaining cellular homeostasis. There are two primary types of cell transport: passive transport and active transport.
Passive Transport
Passive transport does not require the cell to expend energy as substances move from an area
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