22 Respiratory System The Respiratory System Respiratory System Consists of the respiratory and conducting zones Respiratory zone: Site of gas exchange Consists of bronchioles‚ alveolar ducts‚ and alveoli Respiratory System Conducting zone: Conduits for air to reach the sites of gas exchange Includes all other respiratory structures (e.g.‚ nose‚ nasal cavity‚ pharynx‚ trachea) Respiratory muscles – diaphragm and other muscles that promote ventilation Major Functions of the Respiratory
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Chapter 12: Nervous Tissue - The nervous system includes all nervous tissue in the body -Neural tissue contains two types of cells: 1) neurons (10% of all neurons‚ conduct nerve impulses) 2) neuroglia (support neurons) -We have 100 billion neurons -Organs of the nervous system: brain‚ spinal cord‚ sensory receptors of sense organs (eyes‚ ears‚ etc.)‚ and nerves (connects the nervous system with other systems‚ bundle of neurons that relay information) -Functions of the nervous system: 1) sensory
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Disorders of the Nervous System The way we think‚ our emotions‚ and the ability of our body to tell itself to move all connect back to the nervous system. If one part is not connected to another or if something never developed properly it can create a major problem. Disorders can occur within the brain or can be malfunctions of the nerves. Disorders can range from Palsy and Parkinson’s in which symptoms are movements such as tremors to Alzheimer’s which is mental deterioration and loss of memory
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Digestive System: As with any system we are learning in this course‚ the structural anatomy and functions of each are the basis of your learning. Otherwise known as the alimentary canal‚ the best way to learn the digestive system structures and their functions is to follow some food through the process from beginning to end. Where does the food go? As food enters the mouth‚ both mechanical and chemical digestion begins. First the food is physically broken down by the mechanical process
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unnecessary phenomenon‚ we must first understand its causes and effects. Caused by a number of psychological factors‚ teenage drunk driving leads to physical‚ mental‚ and emotional pain for not only the driver but also the innocent bystanders. So‚ what are the causes of drunk driving? For teens‚ it’s caused by our urge to rebel and our unwillingness to speak out against it. The first cause is rebellion. Whether we’re ditching class‚ staying out past curfew‚ or driving while drunk‚ teens have always
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CENTRAL NERVOUS SYSTEM STIMULANTS CENTRAL NERVOUS SYSTEM STIMULANTS Definition Stimulants are a substance which tends to increase behavioral activity when administered. Primary action of a diverse group of pharmacologic agents – adverse effect associated with many drugs. Signs and symptoms * Elevate Mood * Increase Motor Activity * Increase Alertness * Decrease need for Sleep *In case of overdose lead to convulsion and death. Mode of Action * Block neurotransmitters
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“The Difference between the Human Digestive System & the Digestive System of a Cow” Digestion is the mechanical and chemical breaking down of food into smaller components‚ to a form that can be absorbed‚ for instance‚ into a blood stream. Digestion is a form of catabolism; a break-down of macro food molecules to smaller ones. Digestion begins in the mouth‚ for a cow the teeth structure is very different from humans. Instead of having two rows of sharp incisors‚ cows have a single‚ bottom row
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1. What is happening to Ms. Jones’s kidneys‚ and why is it causing the observed symptom? Ms. Jones is having a decreased blood flow to the kidneys from her surgery. This will cause a sudden drop in urine volume called oliguria or complete cessation of urine production called anuria. 2 .What other symptoms and signs might occur? She may also develop headache‚ gastrointestinal distress‚ and the odor of ammonia on the breath caused by accumulation in the blood of nitrogen-containing compounds.
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Phoenix Material Animation: The Digestive System Hydrolysis of Sucrose After viewing the animation‚ answer these questions: 1. The enzyme sucrase breaks the disaccharide Sucrose into two monosaccharides: Glucose ‚ or sugar‚ and fructose ‚ or fruclose sugar. 2. Where does this reaction occur? This reaction occurs on the surface of the instetina epithelial (mucosal) cell surfaces. 3. For hydrolysis to occur‚ the sucrose must bind to what part of the sucrase enzyme? The
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The Circulatory System The Circulatory System is designed to deliver oxygen and nutrients to all parts of the body and pick up waste materials and toxins for elimination. This system is made up of the heart‚ the veins‚ the arteries‚ and the capillaries. Circulation is achieved by a continuous one-way movement of blood throughout the body. The network of blood vessels that flow through the body is so extensive that blood flows within close proximity to almost every cell. Heart The heart
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