Excitable cells Study guides, Class notes & Summaries

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...

SPLH 620 Quiz #1 questions and answers with complete top solutions Dorsal (Superior) top of brain Ventral (Inferior) bottom of brain Anterior front of brain Posterior back of brain GABA primary inhibitory CNS neurotransmitter Axon Hillock location of action potential initiation Spatial Summation integration of synaptic input from dendrites and cell body areas Node of Ranvier area of axon between myelinated sections with many ion channels ...

Excitable CellsWhat is the charge of the resting membrane potential of all cells? Does the ICF or the ECF carry this charge? What is the average RMP value? Do most cells have an RMP that exists in a broad range or a narrow range? - correct answer All cells carry a negative resting membrane potential, and the ICF is negatively charged relative to the ECF. The average RMP value = -70mV. Most cells have an RMP that is small and w/in a narrow range. What types of cells are excitable cells? What i...

NUR 213 Care of Patient with Dysrhythmias study guide Care of Patients with Dysrhythmias – Chapter 34 - Cardiac dysrhythmias are abnormal rhythms of the hearts’ electrical system that can affect its ability to effectively pump oxygenated blood throughout the body - When the heart does not work effectively as a pump, perfusion to vital organs and peripheral tissues can be impaired, resulting in organ dysfunction or failure - Potential Causes: * CAD * Electrolyte imbalances * Impair...

Question 1 1 / 1 pts Which of these is not a characteristic of an action potential? Each normal action potential for a given cell type looks identical, depolarizes to the same potential, and repolarizes back to the same resting potential. An action potential at one site causes depolarization at adjacent sites, bringing those adjacent sites to threshold. If an excitable cell is depolarized to threshold in a normal manner, then the occurrence of an action potential is inevitable. On the...

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 Patho NURS 5315 exam 1| Questions With Verified Answers 2024 Action potential Correct Answer: The process by which excitable cells transmit information from one to another. How is the action potential altered by a potassium imbalance? (Hyperkalemia) Correct Answer: 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 p...

Which are common symptoms of hypokalemia? Select all that apply. A. Paresthesia B. Bradycardia C. Shallow respirations D. Weak, thready pulse E. Musculoskeletal weakness - C, D, E Which electrolyte deficiency results in decreased depolarization in the excitable cells and increased cellular swelling? A. Sodium B. Calcium C. Potassium D. Magnesium - A Which electrolyte imbalance should be anticipated and monitored in a patient with hyperphosphatemia? A. Hypokalemia B. Hypocalcemia C...

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...

action potential - answer-The process by which excitable cells transmit information from one to another. How is the action potential altered by a potassium imbalance? (Hyperkalemia) - answer-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} How is the actio...