terms depolarization and action potential mean the same thing? Action potential is a quick depolarization followed by a repolarization. Depolarization is a one way trip. It also takes a substantial depolarization to cause an action potential. 2. What was the threshold voltage in Activity 1? 3.0 V 3. What was the effect of increasing the voltage? How does this change correlate to changes in the nerve? there was a slight increase 4. How did the action potential generated with the unheated
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control homeostasis EXCEPT A. All of the above are basic components of the feedback system. B. control center. C. receiver. D. receptor. E. effector. Answer Key: C Feedback: Please review chapter 1. Question 2 of 60 0.0/ 1.667 Points Group of related organs that have a common function is called a(n) A. organ. B. organism. C. group. D. system. E. tissue. Answer Key: D Feedback: Please review chapter 1. Question
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Flow of information: synapse -> dendrite -> soma -> axon -> synapse Lecture 2 – Chapters 4 & 5 Ion channels and signalling - ions are separated by cell membrane; when ion channels are opened‚ ions flow -> generating electrical signals -> so neurons can communicate info through these electrical signals - neurons generate a constant negative voltage across membrane: the rmp - an AP abolishes the –ve rmp‚ making membrane potential transiently positive - we can record and measure ion currents using electrophysiology
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Sample ‘short answer’ questions for Lecture Exam 4 (Final Exam) (1) Briefly describe the meninges and spaces that surround the spinal cord. Meningeal Branch: Tiny‚ reenters vertebral canal‚ innervates meninges and blood vessels (2) Distinguish among exteroceptors‚ interoceptors and proprioceptors. Exteroceptors: Respond to stimuli arising outside body Receptors in the skin for touch‚ pressure‚ pain‚ and temperature Most special sense organs (vision‚ hearing‚ equilibrium‚ taste‚ smell) Interoceptors:
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Period 2 Physiology The Case of the Terrible Tooth! Part 1 --The Dentist Questions 1. List the symptoms experienced by Mr. Gower. Mr. Grower experiences symptoms such as feeling hot‚ and light headedness‚ and unawareness. He felt hot and warm prior to the root canal removal. Therefore this symptom is most likely hinting at some problems he got before the removal. His symptoms of lightheadedness could be due to the effects of the surgery or anesthetic. Need more information to be sure. 2. Novocain
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a membrane potential of about -70 mv __F__ reversal of membrane potential due to influx of sodium ions __B__ major cation found outside of a cell __A__ minimal stimulus needed to elicit an action potential __E__ period when cell membrane is totally insensitive to additional stimuli‚ regardless of the stimulus force applied __C__ major cation found inside of a cell a. threshold b. sodium c. potassium d. resting membrane e. absolute refractory period f. depolarization 2. Fill in the
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Excitation Muscle excitation takes place when there is a synaptic transmission and induction of an impulse. There are six steps that take place during muscle excitation. (1)The action potential travels down the somatic motor neuron axon reaching the synaptic bulb causing calcium ions to flow into the synaptic bulb. (2)The increase of calcium in the synaptic bulb causes the synaptic vesicles to undergo exocytosis. (Exocytosis a process that allows large molecule to leave the cell without actually
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The Muscular System: Neuromuscular Junction 1. What insulates each muscle cell? __________endomysium_______________ 2. Synaptic vesicles in the axon terminal of a motor neuron contain what neurotransmitter? __________acetylcholine_______________ 3. An action potential in the axon terminal of a motor neuron opens what type of ion channels? ____________Voltage-gated Calcium_____________ 4. By what means of membrane transport does the neurotransmitter leave the axon
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STUDY GUIDE: THE BRAIN 1. Approximately how many neurons are there in the brain? about 100 billion 2. What is a neuron? It is a nerve cell that sends and receives electrical signals over long distances within the body 2b. be able to label its parts. Parts of a neuron. A neuron has three basic parts‚ the cell body‚ the axon‚ and the dendrites. A thin nerve membrane surrounds the entire cell 3. How fast do neurons travel? Neurons
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Roxann Milbourn Case study number 2 March 13‚ 2014 Badfish anatphys Neurotoxin 1. To present the doctor’s notes portion of the case with a description of the following terms or concepts: Diaphoresis- is the medical term for profuse sweating or perspiring. The skin’s sweat glands sweat to aid in fever management. When your body temp rises you autonomic nervous system causes you eccrine glands to secrete fluid onto the surface of the skin where it cools as it evaporates. Motor dysfunction_
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