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- [Na*] [K*] This diagram is a drawing of normal conditions that occur in a neuron's axon (not all details are included). This stage that a living neuron would be in, would show that O no positive ions are inside the cell current is traveling down the axon O the cell will be at rest once the Na ions enter the cell O the cell is at rest O Na ions are predominantly outside the cellEndocrine Ligand acting on intracellular receptor should be: O Hydrophilic O Hydrophobic O Amphipathic O Macromolecule What kinds of molecules may pass throughA-DA- N == |-| Juárez de Ku BIOL 2402-Anatomy and Physiology I 0 1 2 3 Time (milliseconde) Normal 19. Identify the two major types of channels that open and close during an action potential in a neuron (see images below). the voltage-gated Na* channel and the voltage-gated Kichannel Page 9 of 14 No Spacing
- view View Help O Editing v AaBbCc AaBbCc AaBbCc No Spacing AaBbCc Normal Heading 1 Heading 2 Paragraph Styles 35) T/F Buffers cause abrupt and large changes in the pH of the body by releasing or binding H+ ions. 36) T/F During depolarization, the inside of the neuron's membrane becomes less negative. tions: On You100% Normal text Arial 11 + ... I| I11 I 2 l 3 4 5 6 Select all the correct answers for the question that follows. The resting membrane potential of an excitable cell demonstrates a negative inner face because: the net flow of sodium ions is out of the cell through leakage channels sodium and potassium ion diffuse across the cell membrane according to their electrochemical gradients the net flow of potassium ions is out of the cell through leakage channels large negatively charged protein anions get trapped in the excitable cell O tv Aa ok ProIn 5-7 sentences. Provide a narrative overview of the function of the receptor including: The extracellular signal that acts as the ligand for the receptor The physiological response that is induced The benefits of this pathway to the cell/organism
- Neurons contain _____ which can receive_____ signals from other neurons. axons mitochondria dendrites Golgi bodiesThe secretion of hormones by the pituitary gland is an example of.____ autocrine signaling paracrine signaling endocrine signaling direct signaling across gap junctionsVisit this site (http://openstaxcollege.org/l/neurolab) to see a virtual neurophysiology lab, and to observe electrophysiological processes in the nervous system, where scientists directly measure the electrical signals produced by neurons. Often, the action potentials occur so rapidly that watching a screen to see them occur is not helpful. A speaker is powered by the signals recorded from a neuron and it pops each time the neuron fires an action potential. These action potentials are firing so fast that it sounds like static on the radio. Electrophysiologists can recognize the patterns within that static to understand what is happening. Why is the leech model used for measuring the electrical activity of neurons instead of using humans?
- Watch this video (http://openstaxcollege.org/l/summation) to learn about summation. The process of converting electrical signals to chemical signals and back requires subtle changes that can result in transient increases or decreases in membrane voltage. To cause a lasting change in the target cell, multiple signals are usually added together, or summated. Does spatial summation have to happen all at once, or can the separate signals arrive on the postsynaptic neuron at slightly different times? Explain your answer.What is the arrow identifying in the picture below? soma dendrite O action potential Oaxons axon hillock < Previous MThis type of signal involves the movement of ions across the plasma membranes: graded potentials action potentials both graded potentials and action potentials neither graded potentials nor action potentials This type of signal loses strength as it travels from its point of origin graded potentials action potentials both graded potentials and action potentials neither graded potentials nor action potentials EO 000 DOO