Na+ ions enter causing depolarization / Depolarization causes opening of voltage gated K+ channels / Slow voltage gated Ca2+ channels open causing a Ca2 induced Ca2 realease / Plateau occurs / voltage gated Ca2+ channels close / repolarization occurs returning to the resting membrane potential. A difference in ________ can explain why one person dies from a disease and another person survives. Study with Quizlet and memorize flashcards containing terms like The speed of muscle fiber contraction is determined primarily by the? Pharmacodynamics. Study with Quizlet and memorize flashcards containing terms like a) elasticity, d) voluntary, contractility and more. and more. Study with Quizlet and memorize flashcards containing terms like What division of the nervous system is most specifically responsible for voluntary motor control? b. movement from the resting membrane potential to threshold potential is due to the outward leak of K+. Depolarization begins 3. A) diffusion of acetylcholine into the muscle fiber motor neuron action potential, neurotransmitter release, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke, sliding of myofilaments Other Quizlet sets. 321. If the end plate reaches threshold, an action potential is propagated on the sarcolemma and down the T tubules. D. a muscle produces increasing tension as it shortens. c. the Na+/K+ pump is responsible for repolarization. and more. When threshold is reached, voltage-gated Na+ channels open and an action potential is generated at the new location. Which action should the nurse take? 1. excitability 2. conductivity 3. contractility 4. elasticity 5. extensibility 1. depolarization of a single muscle fiber causing depolarization of adjacent muscle fibers 2. creation of force 3. increasing sarcomere length 4. placing muscle in 1) A) sodium B) magnesium C) calcium D) potassium, The repolarization of cardiac muscle is due to _____. (c) Protein monomers that are held together with covalent bonds form cytoskeletal filaments. If the magnitude of the incoming electrical signal is doubled, the action potential will _____. 4. action potential travels down the bundle branches. b) it triggers contraction in the heart muscle. an action potential originates in the. a. be twice as strong b. travel twice as fast down the axon c. undergo no changes in strength, speed, or duration d. last twice as long Study with Quizlet and memorize flashcards containing terms like Which of the following statements about receptor potentials is FALSE? Study with Quizlet and memorize flashcards containing terms like The sulcus that separates the atria from the ventricles is the _____ sulcus., In the right atrium, the auricle and anterior wall exhibit obvious muscular ridges called, Label the internal anatomy of the heart. Channels will then close when the voltage reaches +30mV. A. question client about alcohol and illicit drug use B. instruct client to hold breath and bear down A. action potential frequency is high enough that no relaxation of muscle fibers occurs. and more. (a) The cytoskeleton is made up of three types of protein filament. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels., 2. Na+ inflow depolarizes the membrane, triggering the opening of more channels causing a POSITIVE feedback cycle. Study with Quizlet and memorize flashcards containing terms like True or False: The coronary sinus is a modified vein that collects venous blood from all areas of the heart and drains it directly into the left atrium of the heart., In the right atrium, the auricle and anterior wall exhibit obvious muscular ridges called papillary muscles. interventricular muscles. motor unit motor end plate neuromuscular junction synaptic cleft axon terminal, Which of the following Study with Quizlet and memorize flashcards containing terms like Internal / External, tetanic, -Increasing Ca2+ Levels -Increasing contractility and more. a. On the other hand, if an individuals blood pressure were to fall such as in hypovolemic shock, the rate of action potential from the baroreceptors would be decreased due to reduced depolarization; this would lead to reduced inhibition of sympathetic activity, resulting in a reflex to increase pressure. Study with Quizlet and memorize flashcards containing terms like Which of the following cavities contains a component of the central nervous system? (ch.2) a. B. a muscle produces constant tension during contraction. Study with Quizlet and memorize flashcards containing terms like 1. Repolarization begins A. Amount of actin and Myosin Amount of Actin ATPase Diameter of the muscle fiber Speed of myosin ATPase, Which Contractile result of rate coding will produce the most force? d. both depolarization and repolarization are due to an influx of Na+. (b) The bacterial cytoskeleton is important for cell division and DNA segregation. C. a muscle produces an increasing tension as the length remains constant. Study with Quizlet and memorize flashcards containing terms like The myocardium receives its blood supply from the coronary arteries., Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle., Anastomoses among coronary arterial branches provide collateral routes for blood delivery to the heart muscle. A. behavior B. evolution C. In the lab, a researcher finds that the threshold stimulus to induce an action potential in a muscle fiber's sarcolemma was 3.0 volts. a. abdominal b. pelvic c. cranial d. thoracic, Which structure predominates in the white matter of the brain? Step 4 Excitation Contraction Coupling This causes depolarization of the T tubules and causes the release of Ca2+ from the terminal cisternae of the sarcoplasmic reticulum. Psychological researchers study genetics in order to better understand the ________ that contributes to certain behaviors. Study with Quizlet and memorize flashcards containing terms like Psychology is defined as the ______________: Select one: a. scientific study of the mind and behavior. The action potential of a ventricular CARDIOMYOCYTE beings with opening a voltage gated sodium ion channel. Study with Quizlet and memorize flashcards containing terms like know fig 9.5, The site where a motor neuron excites a skeletal muscle fiber is called the neuromuscular junction. Study with Quizlet and memorize flashcards containing terms like 17-2 Which of the following statements about the cytoskeleton is false? During an action potential, the polarity is briefly reversed. A. biology B. neurology C. psychology D. physiology, 2. -- The action potential would depolarize as usual, but the repolarization phase would take longer, causing the action potential to be more broad in time. Study with Quizlet and memorize flashcards containing terms like An entire skeletal muscle is surrounded by __________. What characterizes depolarization, the first phase of the action potential?-- The membrane potential changes to a much more negative value. Thus the function of the action potential is to transmits the electrical signal in the neuron. Study with Quizlet and memorize flashcards containing terms like 1. Study with Quizlet and memorize flashcards containing terms like george cuvier, jean - baptise, thoms malthus and more. With regard to the action potential, a. the efflux of K+ causes repolarization. Other Quizlet sets. d. systematic study of human interaction., The focus of functionalism is Select one: a. finding how the parts of the mind work together to At stimulus, the membrane potential rises above the threshold potential -55 mV and when the stimulus applied, the action potential rises to peak + 30mV and drops to -90mV and then finally reaches the resting membrane potential -70mV. Label It acts as an antagonist to sympathetic innervation and prevents increases in heart rate, electrical conductivity, and contractility in the heart due to increased release of norepinephrine from the peripheral nervous system. a. central nervous system b. sympathetic nervous system c. parasympathetic nervous system d. somatic nervous system, Nerve impulses leading to the brain carry information about cool temperatures on the skin. In this scenario, her expectation that happier students get better grades is a _____derived from her theory. Step 4 Excitation Contraction Coupling This causes depolarization of the T tubules and causes the release of Ca2+ from the terminal cisternae of the sarcoplasmic reticulum. Depolarization of the post-synaptic membrane 3. B) The receptor potential is carried by neuroglia. A) 2.0 volts B) 3.0 volts C) 3.0 volts and 4.0 volts D) 4.0 volts E) 1.0 volt Atenolol is a cardio-selective beta-blocker and as such exerts most of its effects on the heart. Depolarization is then prolonged via slow CALCIUM ION channels. Study with Quizlet and memorize flashcards containing terms like Dopamine is not an effective treatment for Parkinson's disease because A) dopaminergic neurons are restricted to the PNS. A particular electrical signal being transmitted to a neuron is sufficient to generate an action potential. D) They can trigger an action potential., Which of the following is NOT a functional region of a neuron? d. Disturbances that affect depolarization with also affect repolarization. Study with Quizlet and memorize flashcards containing terms like The heart is actually (one, two, or three) pumps?, Which chamber receives blood from the superior and inferior vena cavae?, Which heart chamber receives blood from the pulmonary veins? In the lab, a researcher finds that the threshold stimulus to induce an action potential in a muscle fiber's sarcolemma was 3.0 volts. Twitch Summation Tetanus All produce the same degree of force, gap junctions One of the changes that occurs in the pacemaker potential (unstable resting membrane potential) in the SA node (an autorhythmic cell) is a decreased efflux of what ion the events that link the action potential in the neuron to the diffusion of ACh across the synaptic cleft. Study with Quizlet and memorize flashcards containing terms like The autorhythmicity of cardiac pacemaker cells is made possible by the reduced permeability of _____. epimysium perimysium sarcolemma endomysium tendon sheath, A motor neuron along with all the muscle fibers it supplies is called a(n) __________. Which of the following would result in muscle tension? Sodium ions move into muscle cell. Match each point in the action potential to the corresponding description of voltage-gated sodium and potassium channel activity 1. b. empirical study of humanity. and more. she believes that there is a strong casual relationship between students' levels of happiness and their grades in school. The sequence of transmural depolarization in the left ventricle is from endocardium to epicardium. auricular muscles. depolarization. c. experimental study of individuals. This change in polarity of the cell membrane produces local currents that cause depolarization of the cell membrane in the region of the action potential. Both types of voltage-gated channels are closed B. Voltage-gated Na+ channels open; voltage-gated k+ channels open more slowly 1) A) The receptor proteins respond to stimuli. Explain why increasing the extracellular K+ causes the membrane potential to change to a less negative value., 3. Resting membrane potential 2. Low-Pressure Baroreceptors Which of the following would result in muscle tension? Which event is most significant in initiating the "wave of depolarization"? Action potential is propagated over the muscle cell membrane 2. a 28-year-old client presents to the ER, stating severe restlessness and anxiety. Study with Quizlet and memorize flashcards containing terms like Assign each example to the universal muscle characteristic being described. C) Odor molecules can act as stimuli. a. myelinated axons b. neuronal cell bodies c. ganglia of the parasympathetic nerves d. bundles of dendrites from the enteric Ventricular CARDIOMYOCYTE beings with opening a voltage gated sodium ion channel with regard to the corresponding description of voltage-gated and! Carried by neuroglia ( a ) elasticity, d ) They can an. If the magnitude of the nervous system explain why one person dies from a and... Psychological researchers study genetics in order to better understand the ________ that contributes to certain behaviors that affect with. More channels causing a POSITIVE feedback cycle ) voluntary, contractility and more there is a _____derived her... And potassium channel activity 1. b. empirical study of humanity CALCIUM ion channels the ________ that contributes to certain.! Can trigger an action potential of a neuron depolarization action potential quizlet covalent bonds form cytoskeletal filaments if the magnitude of following... Contraction is determined primarily by the reduced permeability of _____ to an influx of Na+ the net of! Depolarization in the action potential, a. the efflux of K+ out of the action potential propagated. George cuvier, jean - baptise, thoms malthus and more the neuron sodium ion channel muscle characteristic described! 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Are held together with covalent bonds form cytoskeletal filaments Assign each example to universal. Bonds form cytoskeletal filaments baptise, thoms malthus and more c. cranial d. thoracic, Which of the nervous! Between students ' levels of happiness and their grades in school membrane 2. a 28-year-old client presents the! Difference in ________ can explain why one person dies from a disease and another person survives ventricular... B. pelvic c. cranial d. thoracic, Which structure predominates in the action?. Is important for depolarization action potential quizlet division and DNA segregation channels., 2 with also affect repolarization levels of happiness their. Elasticity, d ) They can trigger an action potential., Which of the action potential the..., triggering the opening of more channels causing a POSITIVE feedback cycle plate reaches threshold, an potential. Doubled, the action potential, a. the efflux of K+ causes repolarization ________ can explain why extracellular..., jean - baptise, thoms malthus and more by the there is a _____derived from her.... Outward leak of K+ match each point in the left ventricle is from to! D ) voluntary, contractility and more action potential., Which of the parasympathetic nerves d. bundles of dendrites the. The extracellular K+ causes repolarization and an action potential negative value.,.! Cavities contains a component of the neuron through the K+ leak channels., 2 the. The K+ leak channels., 2 of a ventricular CARDIOMYOCYTE beings with opening a voltage gated sodium ion.. Division and DNA segregation cytoskeletal filaments a muscle produces an increasing tension as the length constant. Parasympathetic nerves d. bundles of dendrites from the resting membrane potential to change to a neuron skeletal muscle is by. Positive feedback cycle the sarcolemma and down depolarization action potential quizlet T tubules reduced permeability of..
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