Week 3 notes
Week 3 notes 1205
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This 3 page Class Notes was uploaded by Whitney Martin on Thursday September 15, 2016. The Class Notes belongs to 1205 at University of Pittsburgh taught by Shaun Tomaszewski in Fall 2016. Since its upload, it has received 5 views. For similar materials see Human Physiology in School of Health and Rehabilitation Science at University of Pittsburgh.
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Date Created: 09/15/16
Physiology Chapter 3 Objectives Name the body cavities and compartments o Cranial Cavity (skull) Brain – primary control center o Thoracic Cavity Bounded by spine, ribs, diaphragm Heart – enclosed in membranous pericardial sac Lungs – enclosed in pleural sacs o Abdominopelvic Cavity Abdomen – peritoneum (tissue lining) Stomach, intestines, liver, pancreas, gallbladder, and spleen Pelvis – reproductive organs, urinary bladder, portion of large intestine o Compartments Extra cellular fluid Plasma and interstitial fluid Intracellular fluid Draw the fluid mosaic model of a typical cell membrane and show how the membrane structure relates to its four general functions o Four general functions Physical isolation: barrier for fluid Regulation of exchange with environment: controls entry and exit of ions, nutrients, wastes, and products of cell Communication between cell and the environment Structural support o Phospholipid bilayer Formed from cholesterol and phospholipids Functions as barrier o Cholesterol Buffer – maintains the fluidity of the membrane o Proteins Act as receptors/communication Transport molecules in and out of the cell o Carbohydrates Glycoproteins/lipids Play a role in cells recognizing other cells List and describe the components of the cytoplasm of a typical cell o Cytoplasm: includes all material inside the cell membrane except nucleus o Cytosol – intracellular fluid: semi-gelatinous fluid separated from the extracellular fluid by the cell membrane Contains dissolved nutrients, proteins, ions, and waste products o Inclusions – particles of insoluble materials Some stored nutrients and some responsible for cell function o Protein fibers – insoluble; form the cell’s internal support system o Organelles – membrane bounded compartments Play roles in the overall function of the cell Mitochondria – generate most of the cells ATP Lysosomes – act as the digestive system of the cell Draw, name, and list the functions of organelles found in our cells. o Mitochondria – double walled that creates two sep. compartments; supply cellular energy st 1 compartment Mitochondrial matrix: contains enzymes, ribosomes, granules, and own DNA 2nd compartment Intermembrane space: plays role in ATP production o Endoplasmic Reticulum – involves synthesis, storage, and transport of biomolecules Rough endoplasmic reticulum: main site of protein synthesis Smooth endoplasmic reticulum: lacks attached ribosomes and is the main site for fatty acids, steriods, and lipids o Golgi Apparatus – receives proteins made by rough ER, modifies them, and packages them into vesicles o Cytoplasmic Vesicles – two types Secretory Vesicles – contains proteins that will be released from the cell Storage Vesicles – never leave cytoplasm
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