INTO cell. Phase 1- sodium channels close‚ potassium channels close‚ decrease in potassium and sodium. Calcium channels open‚ increase of calcium into cell. Phase 2- Plateau phase‚ membrane still depolarized (contract). Potassium channels closed‚ L-type calcium channels stay open. Lasts 0.2 seconds/200 milliseconds. Phase 3- second set of potassium channels open‚ potassium decrease. Failing membrane potential cause calcium channels to close‚ calcium decrease to cell. Membrane repolarizes to
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Activity 1 1. Increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels because the membrane is permeable to K+ ions. Therefore‚ the K+ ions will diffuse down its concentration gradient from a region of higher concentration to a region of lower concentration. 2. Increasing extracellular K+ causes the membrane potential to change to a less negative value because the K+ ions diffuse out across the membrane. My results went well compared to my prediction
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R E V I E W S H E E T EXERCISE 1 Print Form The Language of Anatomy Surface Anatomy 1. Match each of the following descriptions with a key equivalent‚ and record the key letter or term in front of the description. Key: a. b. buccal calcaneal 1. 2. 3. c. d. cephalic digital e. f. patellar scapular 4. 5. 6. anterior aspect of knee heel of foot pertaining to the head cheek pertaining to the fingers shoulder blade region 2. Indicate the following body areas on the accompanying diagram
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Semester A Exam Review Sheet • What are the powers of the Senate and House of Representatives? How are they different? • What does Article 1 Section 8 of the Constitution tells us about the powers of Congress? • Why do we conduct a census every ten years and how does it impact representation? • What are interest groups and what is their role in influencing government? • How does a bill become a law? (if you can sing the song you will be fine) • What is the success
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3 day exercise activity analysis Week 8 12/13/2012 Sci 241 Cassandra I get most of my physical activity from work. I work usually eight hours a day and I am on my feet all day. I do moderate to light work at my job. I also have a two year old son that I have to chase around when I get home and that helps me get physical activity. Doing house work helps me with my physical activity. I like to scrub my kitchen floors at least every other day. I do not use a mop because I feel like it does
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Review Sheet Results 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. Your answer: Because outside a typical cell‚ the concentration of K+ is about 5mM and the concentration of Na+ is about 150 mM. When you increase the concentration of K+ from 5 to 25 mM and reduce concentration of Na+ from 150 to 130 mM‚ the outside has more concentration of K+. The membrane is permeable to a particular ion‚ that ion will diffuse down
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Activity 1 Pre-Lab Quiz K+ inside a cell = 150 mM; K+ outside a cell = 5 mM Na+ inside a cell = 5 mM; Na+ outside a cell = 150 mM Stop & Think question What is the polarity of the resting membrane potential (voltage)? Negative What does it mean that the voltage just inside the membrane is negative? B Membrane of most cells contains K+ leak channels…..b What will happen to the resting membrane potential if the extracellular K+ concentration is increase? Less negative What happens
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Exercise 2: Skeletal Muscle Physiology: Activity 1: The Muscle Twitch and the Latent Period Lab Report Pre-lab Quiz Results You have not completed the Pre-lab Quiz. 010/03/12 page 1 Experiment Results You have not completed the Experiment. Experiment Data: 010/03/12 page 2 Post-lab Quiz Results You have not completed the Post-lab Quiz. 010/03/12 page 3 Review Sheet Results 1. Define the terms skeletal muscle fiber‚ motor unit‚ skeletal muscle twitch‚ electrical
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Achievement oriented viii. Stereotypical ‘female’ traits are communal or expressive 9. Warmth 10. Sensitivity/tenderness 11. Empathy 12. Placing concern about others’ welfare above self-interest c. Cultural messages/scripts ix. Masculinities—how do men demonstrate their male identity
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1: EQ1 – What economic reasons caused Europeans to colonize North America? There were four key European countries that colonized North America. Read about these countries below and then contrast their economic reasons for colonizing on a graphic organizer. Several European countries followed the trip made by Columbus in search of new trade routes to Asia. They ended up colonizing North America for different economic reasons. Spain colonized America because they were searching for gold and silver
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