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BSC 215 Exam 1 (UA Hodges) questions /answers 100% correct
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BSC 215 Exam 1 (UA Hodges) questions /answers 100% correct
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BSC 215 Exam 1 (UA Hodges)What are the 7 characteristics of life? - correct answer ✔✔1. Homeostasis
2. Organization
3. Metabolism
4. Growth
5. Adaptation
6. Response to Stimuli
7. Reproduction
What are the major structural levels of organization of the body? - correct answer ✔✔1. Chemical level
2. Cellular level
3. Tissue level
4. Organ level
5. Organ System level
6. Organism level
Describe the principle of Homeostasis - correct answer ✔✔-Stimulus: imbalance is created (room temp
decreases)
-Receptor: body detects the imbalance (thermostat detects the decrease in temp)
-Control Center: acts on the imbalance (thermostat acts on interpretation)
-Effector: imbalance is acted on (heater is turned on to warm the room)
What is the stimulus? - correct answer ✔✔The act of an imbalance/abnormal state
Negative Feedback - correct answer ✔✔Decrease/Increase in regulated variable that results in
Increase/Decrease variable, reduce output (until return to normal)
, Positive Feedback - correct answer ✔✔Increases and reinforces initial stimulus; Increase in variable that
results in feedback that increases the variable
Example of Negative Feedback - correct answer ✔✔-Body Temperature
-Blood Glucose
-Blood Pressure
Example of Positive Feedback - correct answer ✔✔-Childbirth
-Blood Clotting
Gradient - correct answer ✔✔More of something is more present in one area than another
Atomic mass - correct answer ✔✔Protons + Neutrons
Low Penetrance radioactive isotopes - correct answer ✔✔a (= 2 protons, + 2 neutrons) & b (electrons)
particles
High Penetrance radioactive isotopes - correct answer ✔✔y rays
Suspension - correct answer ✔✔Mixture containing two substances that are unevenly distributed and
will settle out as two separate substance
Colloids - correct answer ✔✔Two or more substances that are small and evenly distributed
Soulution - correct answer ✔✔Soulte + Solvent
Solvent - correct answer ✔✔(Water) What the solute dissolves in
Soute - correct answer ✔✔(salt) Substance being dissolved
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