Excitable cells - Study guides, Class notes & Summaries

Bio 252 Exam 1 Questions And Answers Rated A+ Three fundamental physiological properties of neurons, or nerve cells ANS Excitability Conductivity Secretion Excitability ANS the ability of a cell to respond to a stimulus, especially the ability of nerve and muscle cells to produce membrane voltage changes in response to stimuli; also called irritability -all cells are excitable -nerve cells are excitable to the highest degree Conductivity ANS Neurons respond to stimuli by producing ...

Neuroscience ~~> study of the neurons and nervous systems how many neurons are in the brain and what is the power of the brain ~~> 100 billion neurons, and it is about 20W how large are neurons ~~> 10 microns Central Nervous System (CNS) ~~> all the parts within bone (spinal cord, thalamus, brainstem, cortex...) Peripheral Nervous System (PNS) ~~> not within bone (peripheral nerves) brainstem ~~> includes the medulla, midbrain, and the pons spine 2 | P a g ...

sodium potassium pump - ️️enzyme that transports 3 sodium to the outside, and it transports 2 potassium to the inside using the hydrolysis of ATP - creates more sodium outside and more potassium inside and creates a concentration gradient Midline, ipsilateral and contrelateral - ️️line separating left and right of the entire nervous system - ipsilateral means the same side of something and contralateral means the opposite side of something Nissl stain showed (Nissl) - ️️Nissl u...

NURS 5315 Advanced Pathophysiology Ovarian cancer site of metastasis? Peritoneal surfaces, omentum (fold of peritoneum connecting the stomach with other abdominal organs), liver The increased NADH/NAD+ ratio in the liver from ethanol causes: 1. Pyruvate --> lactic acid, causing lactic acidosis 2. Oxaloacetate --> malate. This prevents gluconeogenesis and leads to hypoglycemia 3. Glyceraldehyde-3-phosphate --> glycerol 3- phosphate and combines with fatty acids to form triglyce...

Test Bank Principles of Anatomy and Physiology, 12th Edition, by Bryan Derrickson, Gerald Tortora Testbank Chapter 1. An Introduction to the Human Body Multiple Choice 1. This is the study of the functions of body structures. a. Anatomy b. Physiology c. Dissection d. Histology e. Immunology Ans: B Difficulty: easy Feedback: 1.1 2. This is defined as a group of cells with similar structure and function. a. Tissue b. Organ c. Molecules d. Compounds e. Organism Ans: A Difficulty: easy Feedback: 1.2...

Advanced Patho NURS 5315 exam 1 action potential The process by which excitable cells transmit information from one to another. How is the action potential altered by a potassium imbalance? (Hyperkalemia) The ECF has more K+ ions. The membrane potential becomes more positive (hypopolarized). Cells become MORE excitable. T waves peak. QRS complexes widen. Causes dysrhythmias, weakness, paresthesia. {If membrane potential becomes equal to threshold potential cardiac standstill occurs}...

Ovarian cancer site of metastasis? - ANSWER Peritoneal surfaces, omentum (fold of peritoneum connecting the stomach with other abdominal organs), *liver* The increased NADH/NAD+ ratio in the liver from ethanol causes: - ANSWER 1. Pyruvate --> lactic acid, causing lactic acidosis 2. Oxaloacetate --> malate. This prevents gluconeogenesis and leads to hypoglycemia 3. Glyceraldehyde-3-phosphate --> glycerol 3- phosphate and combines with fatty acids to form triglycerides in the liver,...

Advanced – Dysrhythmias Exam Test with Verified Answers Graded A+ 1. Excitability the ability of non-pacemaker heart cells to respond to an electrical impulse that begins in pacemaker cells. 2. Depolarization occurs when the normally negatively charged cells within the heart muscle de- velop a positive charge. 3. Conductivity the ability to send an electrical stimulus from cell membrane to cell membrane. As a result, excitable cells depolarize in rapid succession fr

Test Bank for Porth's Essentials of Pathophysiology 5th Edition by Tommie L Norris Test Bank for Porth's Essentials of Pathophysiology 5th edition by Tommie L Norris 1. Chapter 1 Although the basic structure of the cell plasma membrane is formed by a lipid bilayer, most of the specific membrane functions are carried out by: A) Bound and transmembrane proteins B) Complex, long carbohydrate chains C) Surface antigens and hormone receptors D) A gating system of selective ion channels Feedback: Th...

3 Distinct Types of Muscle correct answers 1. Skeletal muscle ~ 40% BW, has striated, tubular multinucleated fibers, usually attached to skeleton, voluntary 2. Smooth muscle- narrow, atpered rod shaped cells, nonstriated, uninucleated fibers, occurs in the walls of internal organs and blood vessles, involuntary 3. Cardiac muscle (smooth + cardiac= 10% BW) - striated, tubular, branches, uninucleated fibers, occurs in the walls of the heart, involuntary Muscle is an excitable contractil...