How do muscles move the skeleton? Contract How may possible gametes with A/A? one What process is blocked by operons/prokaryotes? Transcription What is the least involved in translation? DNA In the picture of muscle contraction‚ know what bands decrease in size and which ones stay the same. When the muscle contracts the sarcomere gets smaller and the area between myosin filaments. What are the net products of glycolysis? ATP‚ NADH‚ Pyruvic Acid What are the net products of cellular respiration
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sheath and describe how it is formed in the central and peripheral nervous systems. 7. Classify neurons structurally and functionally. Membrane Potentials 8. Define resting membrane potential and describe its electrochemical basis. 9. Compare and contrast graded potentials and action potentials. 10. Explain how action potentials are generated and propagated along neurons. 11. Define absolute and relative refractory periods. 12. Define saltatory conduction and contrast
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NEURONAL DIVERSITY - Categories of neurons of CNS: 1. Afferent/ sensory neurons – convey information from periphery to CNS 2. Motor- sends commands to muscles and glands 3. Interneurons – most abundant signalling elements in the CNS ( process information locally or convey information from one region of CNS to another • Types: a. Local interneurons/ internuncial neurons/ local circuit neurons – short axon Golgi type II (greatly outnumber type I in CNS)
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Activity 1: The Resting Membrane Potential Pre-lab Quiz Results 1. What is the approximate concentration of K+ inside a typical cell (intracellular concentration)? a. 150 mM 2. What is the approximate concentration of K+ outside a cell (extracellular concentration)? b. 5 mM 3. What is the approximate concentration of Na+ inside a cell (intracellular concentration)? b. 5 mM 4. What is the approximate concentration of Na+ outside a cell (extracellular concentration)? a. 150 mM Experiment
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red color indicates high brain activity. The use of ECVT-based brain activity scanner in detecting brain cancer is possible since the presence of tumor will prevent neuro-signal from reaching the cortical areas. Brain tumors prevent neuro-signal propagation to the cortex‚ causing a certain “brain signal death”‚ indicated by low activity of the brain on corresponding cortex. Therefore‚ the location of brain tumor will be shown as having low activity in the ECVT brain activity map. The ECVT has an advantage
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Virtual Lab Stimulation Exercise 3 Activities 1-5 Study online at quizlet.com/_cfevi 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. An action potential is an "all-ornothing" event. Explain what is meant by this phrase. This means that once the threshold is met‚ an action potential occurs. If the stimulus is too small an action potential does not occur. An action potential is usually initiated in an axon at or near what? The axon hillock‚ the initial segment‚ and the trigger zone. The adequate stimuli
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Thursday‚ January 30‚ 2014 Nervous Tissue ! Anatomy & Physiology - Overall Purpose of the Nervous System ! • To keep controlled conditions within limits that maintain life health and homeostasis ! - Regulates body activities by responding via nerve impulses‚ works with the endocrine system which responds by releasing hormones ! • Responsible for our behavior‚ memories‚ and movements ! • Neurology : branch of medicine that deals with normal functioning and disorders of the nervous system
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Nerve & Muscle Important Solved SEQs By Medical Study Center Ref: Guyton Q.1. a). What is saltatory conduction? Enlist its advantages? 1+1 marks b). briefly mention the three determinants of resting membrane potential. 3 marks Ans: Q.1.a. SATTATORY CONDUCTION: 1 mark Propagation of action potential along a myelinated nerve fiber from one node of Ranvier to other in jumping manner is called as saltatory conduction. r Node to node conduction. Also called saltatory / jumping conduction. All ion channels
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Self-renewal and differentiation are fundamental stem cell fate decisions‚ which are essential for normal tissue development‚ homeostasis‚ and repair actin cytoskeleton and Rho-GTPases‚ mediate downstream signal transduction Serum response factor (SRF) and yes-associated protein (YAP) are two examples of mechano-sensitive transcription factors‚ which have recently been implicated in epidermal and mesenchymal stem cell differentiation Lab notes: Passive processes: transport driven by
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Chapter 8.1 1. List the four biological levels of organization in a human in order from most simple to most complex. Cells‚ tissues‚ organs‚ organ systems 2. Define the term “homeostasis”. The tendency of the body to maintain a relatively constant internal environment. 3. What does the term “feedback system” refer to with respect to homeostasis? A cycle of events in which a variable‚ such as body temperature‚ is continually monitored‚ assessed‚ and adjusted. 4. List the three components
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