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1QQ # 1 for 10:30 Name on top edge, back side of paper Answer on blank side of paper. Answer one of the following: 1.Why are osteocytes (cells that secrete.

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Presentation on theme: "1QQ # 1 for 10:30 Name on top edge, back side of paper Answer on blank side of paper. Answer one of the following: 1.Why are osteocytes (cells that secrete."— Presentation transcript:

1 1QQ # 1 for 10:30 Name on top edge, back side of paper Answer on blank side of paper. Answer one of the following: 1.Why are osteocytes (cells that secrete and maintain bone) classified as a connective tissue cell? 2.The urinary bladder consists of all four cell types. A) Which two cell types account for the vast majority of cells of the urinary bladder. B) What is the role of these cell types in the bladder? 3.What are the two divisions of extracellular fluid and which of these is in direct contact with cells?

2 1QQ # 1 for 11:30 Name on top edge, back side of paper Answer on blank side of paper. Answer one of the following: 1.Why are the secretory cells of the salivary glands classified as a epithelia tissue? 2.The esophagus consists of all four cell types. A) Which two cell types account for the vast majority of cells of the esophagus? B) What is the role of these cell types in the esophagus? 3.A) What are the three compartments of body fluids? B) Which compartment accounts for the largest volume of water? C) Which accounts for the smallest volume?

3 O2O2 pH CO 2 Temp, [glucose], [Na+], [K+], [Ca++], amino acids Nucleic acids

4 Cell Membrane: selectively permeable Capillaries: highly permeable except to proteins

5 The Human Body: A Society of Cells Imagine you are a cell. Ask yourself: Which type of cell am I? (Epithelial, Connective, Nervous, or Muscle) What do I do for myself? (What are my special characteristics and functions?) What do I do for the person in whom I reside? (What are my contributions to the whole organism? To homeostasis?) What do I need simply to survive? In what ways to I depend on other cells? What governs my actions? How long will I live? What would happen to the organism if I along with all the other cells of my type were to fail to function properly? Check Moodle Site to find which cell type you are. Submit your answers to the Moodle Site by Wednesday 9 am. Bring a printout to class on Wednesday.

6 O2O2 pH CO 2 Temp, [glucose], [Na+], [K+], [Ca++], amino acids Nucleic acids

7 Homeostasis: The relative constancy of the internal environment Steady state vs. equilibrium Beggar Thessaloniki, Greece

8 Homeostasis: The relative constancy of the internal environment Steady state vs. equilibrium Street vendor Thessaloniki, Greece

9 Homeostasis: The relative constancy of the internal environment Steady state vs. equilibrium San woman Kalahari Desert, Botswana

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11 Negative feedback Negative Feedback Loop; response is in opposite direction of the disturbance.

12 Negative feedback loops: What to look for The stimulus (temperature, [glucose], pressure, etc.) Sensors (thermo-, chemo-, photo-, mechano- receptors Afferent pathways to integrator (may not exist) Integrators (typically neurons or endocrine cells) Efferent pathways from integrator –nerves –hormones Effector cells or organs –virtually any cell –especially glands and muscles The response (opposes stimulus)

13 Real World Physiology Dr. Schmunk 6’1’’ 165 pounds Regular exercise 25 pound backpack No food before hiking Dr. Davis 6’2’’ 203 pounds Sedentary lifestyle 35 pound backpack Coke, fries, and McBurger 30 minutes before hiking 2.5 mile 1.5 hour hike up Looking Glass Rock, elevation gain 1300 feet Very mild sweatingExtreme sweating! Soaked clothing Explain the difference in degrees of sweating!


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