MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) What is the role of acetylcholinesterase? A) amplify or enhance the effect of ACh B) destroy ACh a brief period after its release by the axon endings C) act as a transmitting agent D) stimulate the production of serotonin 1) 2) The term central nervous system refers to the ________. A) brain‚ spinal cord‚ and peripheral nerves B) spinal cord and spinal nerves C) autonomic nervous
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BIOSC 048: Problem Set Questions 1. Given that cell A has significantly more nongated K+ channels than cell B‚ which cell has the larger resting membrane potential? Explain. If the permeability to K is higher in A than in B‚ then the resting membrane potential (rmp) will be closer to the equilibrium potential in cell A‚ which means the rmp will be more negative in cell A than in cell B; or in other words‚ the potential difference will be LARGER in cell A. 2. Predict the effect of a reduced
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4015 Lab – PNS‚ Spinal Cord and Spinal Reflexes Activity 1 – Nerves Type the numbers‚ in the space provided‚ of the structures pointed out on the diagram of a cross section of a nerve in your lab book with the following terms: 6 axon 12 endoneurium 1 epineurium 2 fascicle 7 motor ending 10 myelin sheath 9 neurilemma 11 node of Ranvier 3 perineurium 5 peripheral nerve 8 Schwann cell 4 sensory receptors What is the difference between a nerve and a neuron? They are both completely
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of the brain which‚ when the brain is pushed to one side applies pressure to that side of the brain‚ crowding these different brain structures together. Additionally‚ with the risk of swelling (which is a result of damage to the axon)‚ it can push these structures’ axons to the point of damage and can result in life inhibiting damage to the brain and its cognitive functions.
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brain’s cells. 7. Describe the four primary structures of a neuron. The cell body is the “control center”. Processes are the structures that extend away from the cell body. Signals from other neurons are received at the dendrites. Axon terminals are at the ends of axons and contain neurotransmitters. 8. Describe the amygdala and its function. The amygdalae are almond-shaped groups of nuclei located deep within the medial temporal lobes of the brain in complex vertebrates‚ including humans. Shown
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Drugs & Behavior EXAM I Study Guide Every correct answer is on the test…MC & Matching terms with definitions. No short answers… Terms: Psychopharmacology study of the action of drugs on living organisms Specific Drug Effects: result from physical and biochemical interactions of a drug with its target tissue Therapeutic effects- desirable effects of drug-receptor binding Side effects- undesirable effects of drug-receptor binding Non-specific Drug Effects: effects of a drug not based on
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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 don’t travel‚ the impulses they transmit do. As a simple analogy‚ a neuron is like an electric cord: it stays still but an electric
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Thirst is the craving for liquids‚ resulting in the basic instinct of humans or animals to drink. It is an essential mechanism involved in fluid balance. It arises from a lack of fluids and/or an increase in the concentration of certain osmolites such as salt. If the water volume of the body falls below a certain threshold‚ or the osmolite concentration becomes too high‚ the brain signals thirst. Continuous dehydration can cause a myriad of problems‚ but is most often associated with neurological
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| |Somatic nervous system |(SNS) Is the part of the PNS that interacts with the external environment. | |Axon |The long narrow process that projects from the cell body. | |Buttons |The button like endings of the axon branches‚ which release chemicals into synapses. | |Autonomic nervous system |(ANS) the part of the PNS that regulates the bodys
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Contraction & 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
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