UA BSC Prep Exams–Graded A+ 2025 The Most Trusted Guide for
Exam Mastery! (A Must Pass!) (80 Questions with Answers)
What are the 7 characteristics of life? - 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? - 1. Chemical level
2. Cellular level
3. Tissue level
4. Organ level
5. Organ System level
6. Organism level
Describe the principle of Homeostasis - -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? - The act of an imbalance/abnormal state
Negative Feedback - Decrease/Increase in regulated variable that results in Increase/Decrease
variable, reduce output (until return to normal)
Positive Feedback - Increases and reinforces initial stimulus; Increase in variable that results in
feedback that increases the variable
Example of Negative Feedback - -Body Temperature
, -Blood Glucose
-Blood Pressure
Example of Positive Feedback - -Childbirth
-Blood Clotting
Gradient - More of something is more present in one area than another
Atomic mass - Protons + Neutrons
Low Penetrance radioactive isotopes - a (= 2 protons, + 2 neutrons) & b (electrons) particles
High Penetrance radioactive isotopes - y rays
Suspension - Mixture containing two substances that are unevenly distributed and will settle out as
two separate substance
Colloids - Two or more substances that are small and evenly distributed
Soulution - Soulte + Solvent
Solvent - (Water) What the solute dissolves in
Soute - (salt) Substance being dissolved
Octet Rule - Atom is most stable with 8 electrons in valence shell
Duet Rule - (Atoms with 5 or fewer electrons) atom is most stable when valence shell holds 2
electrons
Ions - Unequal number of protons and electrons
Exam Mastery! (A Must Pass!) (80 Questions with Answers)
What are the 7 characteristics of life? - 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? - 1. Chemical level
2. Cellular level
3. Tissue level
4. Organ level
5. Organ System level
6. Organism level
Describe the principle of Homeostasis - -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? - The act of an imbalance/abnormal state
Negative Feedback - Decrease/Increase in regulated variable that results in Increase/Decrease
variable, reduce output (until return to normal)
Positive Feedback - Increases and reinforces initial stimulus; Increase in variable that results in
feedback that increases the variable
Example of Negative Feedback - -Body Temperature
, -Blood Glucose
-Blood Pressure
Example of Positive Feedback - -Childbirth
-Blood Clotting
Gradient - More of something is more present in one area than another
Atomic mass - Protons + Neutrons
Low Penetrance radioactive isotopes - a (= 2 protons, + 2 neutrons) & b (electrons) particles
High Penetrance radioactive isotopes - y rays
Suspension - Mixture containing two substances that are unevenly distributed and will settle out as
two separate substance
Colloids - Two or more substances that are small and evenly distributed
Soulution - Soulte + Solvent
Solvent - (Water) What the solute dissolves in
Soute - (salt) Substance being dissolved
Octet Rule - Atom is most stable with 8 electrons in valence shell
Duet Rule - (Atoms with 5 or fewer electrons) atom is most stable when valence shell holds 2
electrons
Ions - Unequal number of protons and electrons
