Transcript Document
Chapter 9 “RESPIRATION” What is the difference between respiration and breathing? Respiration • The transfer of stored energy in food molecules to a form usable by the organism • Involves the exchange of gases between the organism and the environment Process • Through the process of respiration, the organism produces adenosine triphosphate (ATP) which will be used for energy 1. Cellular Respiration • Involves a series of enzymecontrolled reactions in which energy in food is broken down into energy that the organism can use (ATP) a) When ATP is broken down, energy is released and ADP is formed ADP = adenosine diphosphate H2O + ATP ADP + P + energy • This is the energy used by the body to carry out the functions of life Types of Respiration 1. Aerobic Respiration -involves the use of oxygen 2. Anaerobic Respiration -oxygen is not used Respiration • Respiration- is an organisms’ ability to create energy. (ATP) Respiration Aerobic Respiration Anaerobic Respiration Alcoholic Lactic Acid Fermentation Fermentation Glycolysis (splitting glucose) -2 ATP Glucose 2 PGAL (C6H12O6) (C3H5O3) 2 pyruvic acid +4 ATP Net Gain:??? Anaerobic Respiration • • • • Also known as Fermentation Does not require oxygen Takes place in the cytoplasm of cell Glucose is either broken down into lactic acid or alcohol and CO2 • As a result of anaerobic respiration, there is a net gain of 2 ATP’s Equations for Anaerobic Respiration glucose 2 lactic acids + 2 ATP’s glucose 2 alcohol + 2 CO2 + 2 ATP’s • In each equation, enzymes are used and a net gain of 2 ATP’s are produced Anaerobic Respiration “Lactic Acid Fermentation” 2 ATP Glucose 2 pyruvic acid Lactic Acid 4 ATP “Lactic Acid Fermentation Anaerobic Respiration “Lactic Acid Fermentation” ****Net gain: 2 ATP **Not very efficient*** **Carried out by Bacteria and HUMAN MUSCLE CELLS (muscle fatigue) **Ever heard, ”NO PAIN NO GAIN?” **Major economic importance to the dairy industry, production of yogurt, sour cream, buttermilk. Anaerobic Respiration “Alcoholic Fermentation” 2 ATP Glucose 2 Pyruvic acid “Alcoholic Fermentation” Alcohol + CO2 4 ATP Anaerobic Respiration “Alcoholic Fermentation” ****Net gain: 2 ATP **Not very efficient*** Produces Alcohol + CO2 Economic importance to the baking and brewery industries Aerobic Respiration • Requires oxygen • Takes place in the mitochondria • When we say that glucose is oxidized, we say that it is broken down with the help of oxygen molecules Equation for Aerobic Respiration glucose + O2 H2O + CO2 + 36 ATP’s •Again, enzymes are used and a net of 36 ATP’s are produced Aerobic Respiration 2 ATP Glucose 2 Pyruvic acid + O2 +4 ATP Water + CO2 +34 ATP ***Net Gain = 36 ATPs*** Aerobic Respiration ***Net Gain = 36 ATPs*** **most efficient ** 2 phases, anaerobic and an aerobic phase Carried out by humans, plants, protists, and a whole lot more. Aerobic Respiration • 3 steps Summary • Anaerobic Respiration = 2 ATP’s • Aerobic Respiration = 36 ATP’s • Therefore, Aerobic respiration is more efficient than anaerobic respiration Adaptations for Respiration TO RESPIRE: inhaling and exhaling… • Inhalation = O2 (oxygen) enters the body system • Exhalation =CO2 (carbon is passed out of the body dioxide) Human Respiration is controlled by? • Functions by contractions on the? – Brain and Diaphragm Your Respiratory System Nose (nasal cavity) Pharynx Larynx Trachea Bronchi Bronchioles alveoli pleura diaphragm Disorders • • • • Asthma Bronchitis Emphysema Pneumonia Monera, Protista, and Fungi • Gas exchange occurs by diffusion through a thin, moist cell membrane Plants • Leaves- have stomates for gas exchange • Stems- have lenticels for gas exchange • Roots- gas exchange occurs across a moist membrane of root hairs (diffusion) Hydra • Each cell of the hydra is in contact with the watery environment and gas exchange occurs by diffusion Earthworm • Double Diffusion – Skin – Circulatory System • Requires moist skin •The earthworm absorbs oxygen and gives off carbon dioxide through a thin skin. •This skin is protected by a thin cuticle secreted by the epidermis and kept moist by a slimy mucus also produced by epidermal cells. Grasshopper • Uses Tracheal Tubes • Air Sacs • Spiracles You’re doing A fine job dear…. Your Metabolism has two major phases. Anabolism- the • Catabolism- the building of new breaking down of complex substances. substances. • The destructive AKA- Synthesis phase of your metabolism AKA: (Digestion or Hydrolysis) • A process by which simple substances are combined “chemically” to form more complex substances. – These materials are used for growth and repair of the organism. The Borg Ingestion Digestion Transport Synthesis Growth Cells synthesize (or makes) • their own proteins, fats, polysaccharides, and nucleic acids. • use enzymes and energy to synthesize proteins, as do you…. • Cells must constantly make new materials for growth and repair. Secretion • Some cells synthesize materials that are not used within that cell, but are needed somewhere else. Such products are called secretions. Types of Secretions 1.Enzymes – maltase, lactase, and luciferase 2.Hormones – adrenaline, testosterone, and insulin 3.Neurotransmitters –acetylcholine and noradrenalin It’s Hammer Time! 4. Other types of Secretion: • Mucus- coats organs • Chitin- exoskeletons and fungal cell walls • Poisons- defense and capturing food • Hydrochloric acid- for enzymatic hydrolysis • Saliva • Fat- Storage, insulation and protection • Like ear wax • Cellulose- cell walls Luciferase is the enzyme that allows bioluminescent reactions to occur in fireflies.