Exercise 3: Neurophysiology of Nerve Impulses: Activity 3: The Action Potential: Threshold Lab Report Pre-lab Quiz Results You scored 25% by answering 1 out of 4 questions correctly. 1. Axons are You correctly answered: d. long‚ thin structures that extend from a neuronal cell body. 2. Which of the following is easier? Your answer : b. intracellular recordings of the action potential Correct answer: a. extracellular recordings of the action potential 3. An action potential is usually initiated in
Premium Neuron Action potential Nervous system
SCIE206-1104A-04 Unit 2 Discussion Board Energy‚ Metabolism‚ and Cells Jessica Laymon Plasma Membrane The plasma membrane is a membrane that is extremely thin and fluid‚ that surrounds‚ or encloses both eukaryotic and prokaryotic cells. All living cells have plasma membranes; this membrane regulates the interchange of materials between the cell and its environment. The main areas of its structure are a bilayer of phospholipids‚ and proteins. The phospholipids are responsible for the isolation
Premium Cell wall Bacteria Cell
are they located? Chapter Five: Cell Membranes and Signaling 1. Discuss the composition of the cell membrane‚ and how membrane molecules may differ among organisms‚ within an organism‚ and even within a cell. 2. What factors affect membrane fluidity‚ and how? Why is the cell membrane referred to as a “fluid matrix”? 3. Describe the properties of peripheral and integral membrane proteins and discuss membrane protein movement within the membrane. 4. What are recognition sites‚ and
Premium Cell Cell membrane Chromosome
that both are covered by a cell membrane and contain RNA as well as require energy 3. Which type of microscopy provides a 3d view of the surface of an object? Scanning electron microscope 4. Would you find proteins inside cells or cells inside proteins? (Choose one answer.) Protein inside cells 5. Which type of molecule travels through an aquaporin? Small‚ lipid-soluble molecules 6. Explain the basic organization (main components) of a plasma membrane. Include at least 4 distinct parts
Premium Cell Organelle Protein
Aquaporin Water Channels Peter Agre Roderick MacKinnon All living matter is made up of cells. A single human being has as many as the stars in a galaxy‚ about one hundred thousand million. The various cells – e.g. muscle cells‚ kidney cells and nerve cells – act together in an intricate system in each one of us. Through pioneering discoveries concerning the water and ion channels of cells‚ this year’s Nobel Laureates Peter Agre and Roderick MacKinnon‚ have contributed to fundamental chemical
Premium Protein Cell membrane Sodium
CHAPTER ONE ANATOMY - Studies the STRUCTURE of body and their relationships to one another. SUBDIVISIONS OF ANATOMY GROSS ANATOMY - the study of large body structures visible to the naked eye. Regional Anatomy - all structures in one part of the body are studied at the same time Systemic Anatomy - various systems of the body are studied. MICROSCOPIC ANATOMY - examination of body tissue using a microscope. CYTOLOGY - study of the CELLS of the body. HISTOLOGY - study of the TISSUES
Free Protein DNA Cell membrane
channels and enzymes and assisting in trafficking of proteins to the cell membrane (5‚ 8). Why is PIP2 then so important in hippocampal cells? PIP2 is a substrate for hydrolysis by the enzyme phospholipase C (PLC)‚ whereby the products of this interaction are the secondary messengers‚ diacyl Glycerol (DAG) and inositol trisphosphate (IP3) (6‚ 8) that are involved in the regulation of physiological processes on the plasma membrane including calcium mobilisation‚ which all contribute to mediation of synaptic
Premium Signal transduction Neuron Brain
CELLS – CH 3 HISTORY OF CELL DISCOVERIES -1665 – Cells were discovered and named by ____________. (in _________________) -1673 – ______________ was the “Father of _______________”. First to describe ______________________. Other scientists made discoveries which helped to create… The ___________ Theory: 1. _______________________________________________. (Schleiden and Schwann) 2. _________________________________________________________________. 3. __________________________________________________________
Premium Cell Organelle Eukaryote
related chapter in the textbook and then answer the following questions before class. 1. Fungal cells are different from animals cells in that they have a. cell membranes. b. cell membranes made of phospholipids. c. cell walls made of chitin. d. cell walls made of cellulose. e. true membrane bound nuclei. 2. The symbiotic relationship between the organisms in a lichen would best be described as ____________ . a. commensalistic b. mutualistic
Premium Fungus Bacteria Cell wall
ONION EPIDERMIS INTRODUCTION An eukaryote is an organism whose cells contain a nucleus and other structures (organelles) enclosed within membranes. Plant cells are eukaryotic cells that differ in several key aspects from the cells of other eukaryotic organisms. Their distinctive features include: A large central vacuole a water-filled volume enclosed by a membrane known as the tonoplast which maintains the cell’s turgor (provide structural support) and controls movement of molecules between the cytosol
Free Cell Eukaryote Plant