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J.Nguyen SS Set1

Set 1 SCI221

What are basic components of control systems? 1. Sensor mechanism 2. Integrator or control center 3. Effector mechanism 4. Feedback
Negative Feedback Control Negative feedback control systems are inhibitory. They oppose or “negate” a change (such as a drop in temperature) by creating a response in opposite direction. Ex:) Temp regulation
Positive Feedback Control Positive feedback control systems are stimulatory. Instead of opposing a change in the internal environment and caus-ing a return to normal, positive feedback tends to amplify or rein-force the change that is occurring.
What are the 4 major groups of organic substances? 1. Carbohydrates 2. Lipids 3. Proteins 4. Nucleic acids and related molecules
Functional Groups The term functional groups is often used to describe certain arrangements of atoms attached to the carbon core of many organic molecules. Functional groups—also called radicals—often go into and out of combination with large O mols
Prostaglandins (PGs) often called tissue hormones, are lipids com-posed of a 20-carbon unsaturated fatty acid that contains a 5-carbon ring. Many different kinds of PGs exist in the body. We now classify 16 PG types into nine broad categories
Proteins All proteins have four elements: carbon, oxygen, hydrogen, and nitrogen. Many proteins also contain small amounts of sulfur, iron, magnesium, zinc, and other trace metals. Some also contain phosphorus.
Principal Types of Tissues 1. Epithelial 2. Connective 3. Muscle 4. Nervous
Development of Tissues Within the first 2 weeks after conception, cells of the offspring move and regroup in an orderly way into three primary germ layers called endoderm, mesoderm, and ectoderm
What is Regeneration? growth of functional new tissue
Created by: j3ssicann
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