Cellular_Physiology_HPLAB

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University of Central Florida *

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2010

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Biology

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Feb 20, 2024

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Name: Dianne Ignacio Date: 1/26/2024 Cellular Physiology Exercise 1.1 Table 1.2 Time (minutes) Temperature ( ̊ F) Heart Rate (beats per minute) Respiration Rate (breaths per minute) 0:00 (Resting) 97.1 68 18 2:00 (Warm-up) 98.1 100 24 4:00 98.3 132 30 6:00 98.3 136 32 8:00 99.0 136 30 10:00 (2:00 post exercise) 98.9 88 22 12:00 (4:00 post exercise) 98.7 92 18 Question 9 a. exercise d. hypothalamus b. temperature e. sweat glands c. Thermoreceptor f. sweating Question 10 This is negative feedback because the body is going out of homeostasis in response to the stimulus due to exercising and must regulate. Question 11 96 96.5 97 97.5 98 98.5 99 99.5 Temperature 1 Temperature in celcius minutes
Name: Dianne Ignacio Date: 1/26/2024 (minutes) 0:00 (Resting) 2:00 (Warm-up) 4:00 6:00 8:00 10:00 (2:00 po st exercise) 12: 00 (4: 00 post exercise) 0 40 80 120 160 Heart Rate 0 10 20 30 Respiration Rate Exercise 1.2 Question 8 Post-experiment, noticeable changes in color were observed: the 0.01 solution remained clear, the 0.1 solution darkened slightly, and the 1.0 solution exhibited the darkest color. Comparing tonicity between the iodine and starch solutions revealed that iodine is hypotonic in relation to the starch solution, proving that the movement of water from the iodine to starch due to hypo to hyper tonicity. Tonicity comparison would be that the 0.01 starch solution was hypotonic to the 1.0 starch solution, while the reverse was true for the 1.0 starch solution being hypertonic to the 0.01 starch solution. Similarly, the 0.1 starch solution showed hypotonicity to the 1.0 starch solution, and the 1.0 starch solution showed hypertonicity to the 0.1 starch solution. The experiment also highlighted the role of osmotic pressure with the 1.0 starch solution exerting the highest osmotic pressure. Starch, as a non-penetrating solute, affected osmotic pressure without entering the membrane. This helps explain the differences in tonicity we observed and the noticeable color change, which happened because of the iodine being pulled in due to changes in osmotic pressure. Question 9 Iodine. 2 Heart rate per minute minutes Breaths per minute minutes
Name: Dianne Ignacio Date: 1/26/2024 Question 10 The iodine diffuses out of the bag into the starch solution through the membrane. This is from a hypertonic to a hypotonic environment. When iodine interacts with the starch in beaker, the solution would be the one that changes color. This process will continue until equilibrium is reached, demonstrating diffusion and osmosis. Exercise 1.3 Question 1 The human body has normal levels of 0.9% physiological saline. 0.9% IV saline is isotonic to our cells, so it maintains the patient’s blood pressure in the meantime. If accidentally given 9.0% saline solution, the patient’s cells would dehydrate quickly and become shriveled due to water moving out of the cell via osmosis and is hypertonic because of higher osmotic pressure. If accidentally given 0.09% saline solution, the patients cells would expand having water move into the cell and may potentially lead to cell rupture through osmotic lysis and is hypotonic because of lower osmotic pressure. 3
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