Injecting potassium into the blood stream stops the heart.  In this case, cardiac muscle cells would be stuck in the  Select one: a. Absolute refractory period b. Resting state c. Relative refractory period

Q: The pacemaker cardiac muscle cells rely on ______________ for their action potentials. a. Na+ leak…

A: The pacemaker cells create rhythmic impulses which set the pace for pumping the blood. The pacemaker…

Q: Katrina has an aldosterone imbalance. What does Catrinas hormone feedback loop look like? When…

A: Introduction :-

Q: What happens to the sodium inside the cell once the action potential has passed down the axon.…

A: Normally the cell membrane remains negative inside in comparison to outside. This negative potential…

Q: Under which conditions could the opening of a chloride channel actually depolarize a neuron rather…

A: Ion channels are transmembrane proteins that allows specific Ions to move across the membrane along…

Q: Say if the following cells are excitable or not: 1. Neuron: 2. Skeletal muscle: 3. Skin: 4. Smooth…

A: Chemicals, cells, tissues, organs, organ systems, and organisms make up the human body's…

Q: Start by giving one, detailed sentence that describes the figures below. Then tell me what is…

A: An action potential is a characteristic pattern of quick rise and subsequent decline in voltage or…

Q: [ANIMAL PHYSIOLOGY] You are probably quite nervous about the exam. You notice that your heartbeat is…

A: It is one of the common observation during exam;There is sort of nervousness in us; occur may be due…

Q: Which of the following events occurs due to a reduced sympathetic stimulation of the heart? Question…

A: The objective of the question is to understand the effects of reduced sympathetic stimulation on the…

Q: Atropine works by blocking acetylcholine receptors. If you add acetylcholine to the heart, followed…

A: Many vital physiological processes in the human body are regulated by the autonomic nervous system…

Q: What is the main source of the electrical potentials recorded from the scalp of a human subject? In…

A: Introduction  When a neuron transfers information away from the cell body and down an axon, it…

Q: Activation of what receptor directly causes stimulation of the heart? a-1 a-2 B-1 B-2 B-3

A: Mostly all blood vessels have both alpha and beta receptors. In general, Alpha-adrenergic receptors…

Q: Which of the following is true of graded potentials? a. They always reach the same voltage o b. They…

A: Neurons are the basic structures and functional units of the nervous system. The axon or the nerve…

Q: If we surgically innervated the SA node with lower motor neurons and stimulated the lower motor…

A: The SA (sinoatrial) node is considered the pacemaker of the heart, as it initiates an action…

Q: What makes an impulse move down the line…i.e. what causes the next zone to depolarize? A. the Na+/K+…

A: A neuron has the capability of receiving inputs from another neuron. If this input is strong, then…

Q: During depolarization, the membrane potential becomes more positive. O True O False

A: Every cell in our body has cell membrane that separates it from the outer environment tissue, The…

Q: The following is supplied by autonomic nervous system: Select one: a. Glands b. Smooth muscies C.…

A: The human neural system consists of two contrasting functional subsystems- the central nervous…

Q: Answers A-D A Current from neighboring regions can trigger a second action potential in phase 2 B…

A: Introduction  A transient voltage change (membrane potential) across the cell membrane of heart…

Q: What is the role of Ca2+ in the shape and duration of an action potential. (Cardiac muscle cell)

A: The duration of an action potential for cardiac muscle cell is between 200-250 milliseconds. There…

Q: Explain the difference between the relative and absolute refractory periods. Briefly describe the…

A: A voluntary muscle fibre contracts when threshold stimulus (optimum stimulus that could generate a…

Q: You are recording from a funny-looking cell. You hold the cell at various voltages and record the…

A: This experiment investigates the permeability of a cell to K+ ions. By comparing the current…

Q: During the depolarization phase of an action potential, the permeability of the plasma membrane toa.…

A: Depolarization influence the membrane to attain the threshold potential at which the nerve cell…

Q: Increased action potentials from the sympathetic nervous system would cause which of the following?…

A: The sympathetic nervous system (SNS) directs the body's fast involuntary response to dangerous or…

Q: Which of the following is the plateau stage of the action potential? A. Phase 0 B. Phase 1 C. Phase…

A: The heart is an excitable organ which can spontaneously generate action potentials. There are three…

Q: In a resting neuron, which of the forces listed below will act to push sodium (Na+) ions into the…

A: Action potential generates when the neurons want to pass the information along the body from its…

Q: During the patellar reflex, you measure voltage change in the flexor muscle motor neuron cell body…

A: The L2, L3, and L4 spinal cord segments are tested by the patellar reflex, also known as the knee…

Q: Explain how the accelerometer and the EMG electrodes work together to generate data on response…

A: An accelerometer is a gadget that tests a structure's vibration or movement acceleration. The…

Q: .dחaMa"in it the

A: The equilibrium potential is the particular membrane potential where the net flow through any open…

Q: Compare and contrast calcium, sodium, and potassium ion channels used in neurons.

A: Ions are charged species which are nessesry for neuronal communications . Thier movement helps in…

Q: During an action potential _______    A. Na+ flows out of cell and causes depolarization  B. K+…

A: A characteristic pattern of rapid rise and subsequent fall in voltage or membrane potential across a…

Q: Calcium is highly regulated molecule in cells due to its importance in cell signaling. A. Briefly…

A: The process through which muscle fibers produce tension and exert force is known as muscular…

Q: The inward rectifier does not:   A. Conduct potassium.   B. Carry inward current during the action…

A: Ion channels are transmembrane proteins that can form pores for the passage of ions through the…

Q: A bundle of axons in the peripheral nervous system is called a: A. Neuron B. Ganglion C. Tract

A: Axons are long, slender projections of a nerve cell, or neuron, that conduct electrical impulses…

Q: Response to a stimulus within the central nervous system differs from that of a reflex arc because…

A: There are changes in the internal as well as the external environment of an organism and these…

Q: Define the following terms: a. lecithin b. phosphatidylcholine c. cardiolipin d. GPI anchors e.…

A: Lecithin is a fat required in the cells of the body. Phosphatidylcholine is a chemical present in…

Q: A. There is a lower resistance in the lower panel at the point where voltage is measured. B. There…

A: To identify: To identify the correct difference between the middle panel and the lower panel from…

Q: When an action potential happens: OA Sodium rushes into the cell in the first stage creating…

A: A nerve cell is a specialized cell for the communication to transmit information between neuron…

Q: How would antibodies against nicotinic acetylcholine receptors (nAChRs) affect the influx of sodium…

A: Nicotinic acetylcholine receptors (nAChRs) are receptors that bind to the ligand acetylcholine,…

Q: When comparing cardiac muscle cells and skeletal muscle cells, Select one: a. only skeletal muscle…

A: The objective of the question is to identify the correct statement when comparing cardiac muscle…

Q: The patient's muscle weakness, dizziness, and nausea are all due to hypokalemia. How does…

A: When the serum potassium level decreases from the normal value then it arises a condition to define…