Lecture Notes by Donna Francis to accompany Life: The Science of Biology‚ Tenth Edition Sadava • Hillis • Heller • Berenbaum Chapter 46: Sensory Systems 46.2 How Do Sensory Systems Detect Chemical Stimuli? Chemoreceptors: receptor proteins that bind to specific molecules‚ their ligands; responsible for taste and smell. Also monitor internal environment‚ such as CO2 levels in blood. Olfaction is the sense of smell. Olfactory sensors are embedded in epithelial tissue at top of nasal cavity (in
Free Olfaction Taste Signal transduction
PE 220 EXAM 2 NOTE Cards Term Which of the following is an amphipathic molecule? Definition integral membrane protein Term If the direction of the net flux of an ion is against its electrochemical gradient‚ then that transport is passive. Definition False Term Of the gradients listed below‚ which is the most accurate description of the force that ultimately determines the movement of ions across the membrane? Definition Electrochemical gradient Term Which of the following pairs of
Premium Protein Cell Membrane biology
BIO 353 Cell Biology Study Questions for Exam #3 Fall‚ 2012 Cytoskeleton “The harder the conflict‚ the more glorious the triumph.” Thomas Paine... “Unless you really just screw up.” Bush 1. What are microfilaments? (He said know how to identify/draw these) Note: since it is multiple choice‚ I doubt we will have to know how to draw them. **There are also short essay questions and‚ in past classes‚ he has asked students to draw. I thought the final was ALL MULTIPLE CHOICE???********************************
Premium Signal transduction Protein Mitosis
The nonmutated form of DMPK functions in the production of protein kinase serine; this enzyme plays a role in intracellular communication and in the regulation of myosin phosphate. When DMPK is mutated‚ the proteins CUG-BP1‚ MBNL1 and INSR are displaced causing the splicing of troponin pre-mRNA which causes malfunctions in the cardiac conduction system‚ dominance of a chloride channel that causes myotonia‚ dominance of an insulin receptor that affects the sufficiency of insulin‚ and dominance of
Premium Protein DNA Gene
BUAD 490 3/14/13 Team Written Case Analysis (Concise) Biodel‚ Inc. BIODEL INC. EXECUTIVE SUMMARY Biodel’s use of biotechnology expertise in the three prime areas of Cell Biology‚ Molecular Biology‚ and Immunodiagnostics has led their company into some great opportunities. Biodel created a synthetic serum to replace fetal calf serum and horse serum‚ and provide a more consistently available product for scientific researchers. Biodel’s Molecular Biology division used DNA technology to
Premium Marketing DNA Molecular biology
The gaseous hormone ethylene has been shown to influence a diverse array of plant growth and developmental processes‚ thus it is critical for plants to optimize the ethylene production at developmental transitions as well as during stress response. Ethylene is derived from the amino acid methionine‚ which in the first step is converted to S-adenosyl-methionine (AdoMet) by AdoMet synthetase3‚4. The 1-Aminocyclopropane-1-Carboxylic acid Synthase (ACS) catalyzes the conversion of AdoMet to 1-aminocyclopropane-1-carboxylic
Premium Protein DNA Gene
Summary of Presentation: Fe2+/H2O- mediated synthesis of Melanins: Cases of Homogentisic acid‚ serotonin‚ and norepinephrine The powerpoint presentation that I attended was titled‚ “Fe2+/H2O- mediated synthesis of Melanins: Cases of Homogentisic acid‚ serotonin‚ and norepinephrine‚” the research covered melanin which is a dark pigmentation that can cause other complication and pathological conditions such as‚ vitiligo and ochronosis. It is believed that melanin protects from ultraviolet light rays
Premium Psychology Brain Mind
MICROBIOLOGY COURSEWORK The effect of antibiotic concentration on bacterial growth Introduction Null Hypothesis- Increasing the antibiotic concentration has no effect on bacterial growth. Experimental Hypothesis- Increasing the antibiotic concentration decreases bacterial growth. Scientific Theory Bacteria are prokaryotes and can be identified by their shape. Spherical bacteria are called cocci‚ rod shaped bacteria are called bacilli‚ spiral shaped bacteria are called spirilla and
Free Bacteria
Weekly iLab iLab: Bacterial Growth and Controlling Bacterial Growth Scenario/Summary: This week’s experiment focuses on bacterial growth and methods to control bacterial growth. This week’s experiment will be conducted in two parts: Experiment I: Growth Media and Patterns of Growth and Experiment II: Controlling Microbial Growth. Experiment I: Growth Media and Patterns of Growth. In part I of this week’s experiment‚ you will explore the characteristics of several types of growth media. For example
Premium Bacteria Microbiology Microorganism
Lab‚ Week ASEPTIC TECHNIQUE AND BACTERIAL ANATOMY AND MORPHOLOGY Introduction Part I: Aseptic Technique The purpose of this experiment is to become familiar with the specific microbiological technique known as the aseptic technique‚ which is used to avoid contaminating cultures. In this case a pure culture of an unknown organism was introduced to a sterile medium of Phenol Red Glucose Broth Durham. The culture was obtained from a 52-year old male truck driver who is complaining
Premium Gram staining Bacteria