Excitable cells Study guides, Class notes & Summaries

TEST BANK FOR Campbell Biology 9th Edition Glossary A 5′ cap - A modified form of guanine nucleotide added onto the 5′ end of a pre-mRNA molecule. A site - One of a ribosome's three binding sites for tRNA during translation. The A site holds the tRNA carrying the next amino acid to be added to the polypeptide chain. (A stands for aminoacyl tRNA.) ABC hypothesis - A model of flower formation identifying three classes of organ identity genes that direct formation of the four types of f...

Action Potential: Hypokalemia leads to what complications - answer-Potassium leaves the cell leaving behind negative anions, cell hyperpolarizes making the cell more negative and therefore less excitable CC: Weakness, Smooth Muscle atony, parathesias (pins and needles), Cardiac dysrythmias Action Potential: Hyperkalemia lead to what complications - answer-Increased potassium will come into the cell and make it more positive, depolarization will occur taking the RMP closer to the Thresho...

SCRN Review (CNRN Part 1) Exam 2023. By definition, what is a neuron? - Answer- An excitable cell that is capable of conducting electrical signals and receive stimuli from the central and peripheral fields What are neuroglia? - Answer- Non-excitable cells with supportive and protective functions What are the two cell categories in the nervous system? - Answer- Neurons (excitable) Neuroglia (nonexcitable) What part of the neuron receives signals? - Answer- Dendrites What part of the neuro...

Bio 210 chapter 11 questions and answers rated A+ The nervous system is? The master controlling and communicating system of the body The three functions of the nervous system are? 1. Sensory input 2. Integration 3. Motor output The sensory input gathers information by the internal and external sensory receptors The integration function processes and interprets the sensory input The motor output function activates the effector organs (muscles and glads) and produces the appro...

Cellular Physiology 1. Analyze the steps of the action potential. ● Sodium permeability increases, sodium ions move into the cell increasing positivity, depolarization is occurring, action potential threshold is reached as cell becomes more positive, potassium permeability increases, potassium ions leave the cell, repolarization is occurring, resting membrane potential is reestablished. · The action potential carries signals along the nerve or muscle cell and conveys information from o...

SCRN Review (CNRN Part 1) Exam 2023. By definition, what is a neuron? - Answer- An excitable cell that is capable of conducting electrical signals and receive stimuli from the central and peripheral fields What are neuroglia? - Answer- Non-excitable cells with supportive and protective functions What are the two cell categories in the nervous system? - Answer- Neurons (excitable) Neuroglia (nonexcitable) What part of the neuron receives signals? - Answer- Dendrites What part of the neuro...

3 characteristics that distinguish nervous systems from endocrine systems - correct answer NERVOUS SYSTEM: -Rapidly transmitted signals -neurotransmitters over synapses -action potentials over long distances ENDOCRINE SYSTEM: -Slower transmission via circulatory system -hormones as the chemical messangers 2 types of chemical signaling aside from those used in nervous and endocrine systems - correct answer AUTOCRINE/PARACRINE: chemicals secreted by cells with local effects ...

ANP EXAM 3 QUESTIONS & ANSWERS 2024/2025 In a bedridden patient recovering from a badly fractured femur, disuse atrophy in the thigh muscles is caused by _________. decreased ability of muscle cells to produce ATP, resulting in decreased ability of the muscles to contract decreased ability to synthesize acetylcholine in the neurons that innervate the thigh muscles decreased synthesis of muscle proteins and/or increased breakdown of muscle proteins none of the above - ANSWERSdecreased ...

Which of the following situations occurs in electrically excitable cells? Select one: a. The sodium-potassium pump moves sodium into the cell. b. The opening and closing of ligand-gated channels cause depolarization. c. Sodium ion channels are opened by high extracellular calcium levels. d. When Na ion channels open, K ion channels close. e. Depolarization causes voltage-gated sodium ion channels to open. + + My Account Question 2 Correct 5.00 points out of 5.00 Question 3 Correct ...

Barkley PNP DRT 2 Questions And Answers 2023 The parents of a 2 month old male bring him to the emergency department. His parens info you the he has a history of iiirtibility. He has developed recurrent vomitng and choking while feeding. You ask the parens about the child's stools, to which they respond by saying that he has been going less frequently, but there are no noticeable changes in the stool itself. Of the following choices, which is the most likely cause? A. Pyloric stenosis B. Menin...