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Anatomy & Physiology I Chapter 4 [Section 4 Resting Membrane Potential]Resting membrane potential - correct answer the difference in charges across plasma membrane of excitable cell at rest What are the 2 cellular conditions significant in establishing and maintaining RMP? - correct answer 1.) Cell has unequal distribution of ions & molecules across plasma membrane. 2.) Relative amounts of positive & negative charges aren't equally distributed at plasma membrane What are the 2 ions respo...

ap chpt 11 know fig 11.1 - correct answer 11.3 - correct answer 11.5 - correct answer The resting membrane potential is maintained by Na+-K+ pumps that actively transport ? into and ? out of the cell. The membrane is more permeable to ?. The concentration of ? is higher outside than inside the cell. The concentration of ? is higher inside than outside the cell. - correct answer 1. k+, na+ 2. k+ 3. Na+ 4. k+ Ions are unequally distributed across the plasma membrane of all ce...

Bio 5 Lecture Exam 2 Chapter 7Which neurological disease is due to a lack of myelin? - correct answer multiple sclerosis What processes causes the release of neurotransmitters? - correct answer exocytosis A drug destroys acetylcholinesterase. What do you expect would happen? - correct answer Muscles cannot relax Which portion of a neuron releases neurotransmitters? - correct answer Axon ending What is the purpose of myelin? - correct answer increase velocity of neural impulse conduct...

Bio Exam 1 Lecture 3- Nervous System Secretion & Summationsecretion - correct answer converting an electrical signal to a chemical signal; allows neurons to communicate with each other what helps vesicle transport down the axon to the synapse - correct answer microtubules (cytoskeleton) Neurotransmitters released from a presynaptic cell bind to ______protein channels located in the membrane of the postsynaptic cell. - correct answer ligand-gated summation - correct answer total (or sum)...

biol-1412 lab questions what is rmp - correct answer -a charge difference (potential difference) that exists across the cell membrane at rest, usually -70mv what factors produce the rmp - correct answer 1. na/katpase 2. org- inside cells 3. more non gated k channels than na at rest how do ion channel proteins function to establish the rmp - correct answer 1. k diffuses out down concentration gradient, cell becomes negative 2. unlike charges attract k diffusion slows as inside becomes...

CardiacWhat are the individual ion contributions to the resting membrane potential (RMP) of the SA node nodal cells? - correct answer (X) Greater concentration of Na+ outside the cell ( ) No Na+/K+ pump (X) Greater concentration of K+ inside the cell (X) Calcium (Ca2+) gradient with more calcium outside the cell Check all that occur during ventricular systole. - correct answer ( ) The AV valves open to allow blood to enter the ventricles from the atria. ( ) The semilunar valves remain clo...

Ch 11 HW Drag the charges to the correct side of the membrane to represent the resting membrane potential of a typical neuron. - correct answer Use the provided ions to correctly complete each sentence about the resting membrane potential. Ions may be used more than once, or not at all. - correct answer Drag and drop the correct concentrations and the direction of the concentration gradient in a cell at RMP. - correct answer Which choice best characterizes K+ leakage channels? - cor...

Ch 12 The peripheral nervous system is made of nerves and ____________? - correct answer ganglion Sensory input and motor output are used to divide the nervous system ______. - correct answer functionally The epineurium is made of ______ connective tissue. - correct answer dense irregular An individual axon is wrapped in a connective tissue covering called the ______. - correct answer endoneurium Nerves that contain both sensory and motor neurons are called _______ nerves. - correct...

CH. 8 Disorders of Fluid, electrolyte, and acid-base balanceExtracellular fluid compartment(ECF) - correct answer interstitial(tissue spaces) ECF - correct answer Plasma(vascular)compartment What effect does a potassium level of 7.5 mEq/L have on resting membrane potential (RMP) - correct answer RMP becomes less negative, an it takes less of a stimulus in order for cells to fire. Rationale: A potassium level of 7.5 mEq/L is considered hyperkalemic. In hyperkalemia, RMP is moved closer to ...

Chapter 71. What is action potential (AP)? - correct answer the form of electrical signals called action potentials (AP), which are rapid changes in membrane potential during which the inside of the cell becomes positively charged. (-100mV) From the negative to the positive. 1. Where does an AP originate and travel to? - correct answer Originates in the axon hillock and travels to the axon terminal. 2. Define leak channels and their locations. - correct answer • Always open (non-gated) ...

Chapter 11 - Fundamentals of Nervous SystemWhich choice best characterizes K+K+ leakage channels? - correct answer transmembrane protein channels that are always open to allow K+K+ to cross the membrane without the additional input of energy Assume you have a membrane with only potassium leakage channels. The RMP is -90mV. Predict the RMP if we add Na+Na+ leakage channels.The most likely RMP value of Na+Na+ is __________. - correct answer -70 mV Imagine that the cell membrane from the prev...

Chapter 12 Review ContWhat is Electrophysiology? - correct answer Cellular mechanisms for producing electrical potentials and currents. What is Electrical potential? - correct answer A difference in concentration of charged particles between one point and another. What is Electrical current? - correct answer A flow of charged particles from one point to another? In the body, what are "currents"? - correct answer Movements of ions, Na+ or K+, through gated channels in the plasma me...

Chapter 19 Heartfalse - correct answer T/F: the only arteries that carry oxygen-poor blood is the coronary arteries aortic valve - correct answer Left ventricular contraction propels blood through which valve? 4 - correct answer how many pulmonary veins are there? true - correct answer T/F: the ventricles begin to fill during ventricular diastole. ventricular diastole - correct answer The semilunar valves close during ______________ __________ ventricular diastole - correct answer...

Definitions- Synapsessynaptic transmission - correct answer process of transferring info from one cell to another at a synapse electrical synapse - correct answer synapse in which electric current flows from one cell to another via a gap function chemical synapse - correct answer synapse in which presynaptic activity stimulates the release of a neurotransmitter, which activates receptors in the postsynaptic membrane (in the brain) synapse - correct answer specialized junction where one ...

DSM Chapter 11Describe the ion and charge distribution of the resting membrane potential (RMP). - correct answer Outside of the cell has more sodium ions and is more positive. Inside of the cell has more potassium ions and is more negative. Directly after repolarization, what is the charge and ion distribution? - correct answer inside negative with more sodium ions and outside positive with more potassium ions Which is true of the sympathetic nervous system? - correct answer It turns on du...

Electrical Activity of the HeartWhat is an action potential? - correct answer Rapid change in the transmembrane potential followed by a return to the resting membrane potential When do changes in transmembrane potential occur? - correct answer During changes in the permeability of the cell membrane to intracellular and extracellular ions Is the duration of APs in cardiac cells shorter or longer than in nerves cells or skeletal/smooth muscle? - correct answer Much longer What is the effe...

Equilibrium Potential and RMP The Neuron - correct answer Is compartmentalized Dendrite and soma are responsible for receiving the input signals Axons are responsible for sending out the signals to the terminals Uphill vs. Downhill gradient - correct answer Uphill= active, consumes body's energy ATP Downhill= passive, does not consume body's energy (no ATP used) Equilibrium potential - correct answer When electrical force (diffusion potential) increases to the point that it exac...

ES 342 - Chapter 2 - Review Questions.If the permeability of a resting (non-active) nerve cell to potassium ions is increased while the permeability of the cell to sodium ions remains constant, the resting membrane potential will... A. Be unaffected B. Depolarize C. Hyperpolarize - correct answer Hyperpolarize - become more negative Which of the following statements most accurately summarizes the resting membrane potential? A. It exists only when no ions are moving across the nerve membra...

exam 2 multiple answers A&P IICheck all that are characteristics of cardiac muscle. A. Cells are long and cylindrical. B. Cells are short and branching. C. Cells have multiple nuclei at the periphery of the cell. D. Cells have one or two nuclei in the center of the cell E. They are composed of thick and thin filaments. F. The functional contractile unit is the sarcomere. - correct answer B, D, E, F Check all that occur during ventricular systole A. The AV valves open to allow blood to...

Exam 4 *The __________ division carries signals to the smooth muscle in the large intestine.* a. visceral sensory b. somatic sensory c. visceral motor d. somatic motor e. afferent *The __________ division tends to prepare the body for action.* a. sensory afferent b. motor afferent c. somatic motor d. parasympathetic e. sympathetic *Which of the following are effectors?* a. Receptors b. Stimuli c. Reflexes d. Glands e. Sense organs *What is another name for the autonomic ...