BME Quiz 2 Question and answers
verified to pass 2025/2026
Homeostasis - correct answer ✔The tendency of a system to maintain internal stability, from a
coordinated approach in response to a situation or stimulus which disturbs its normal condition or
function.
**NOT EQUILIBRIUM
Feedback Control - correct answer ✔1. Variable: the imbalance/ produces change in variable
2. Receptor: Change detected by receptor
*Information sent along a pathway
3. Control Center: Brain
*Information sent on a pathway
4. Effector: Counteracts the imbalance; certain organ that responds
5. Response
Negative Feedback - correct answer ✔Most homeostatic control mechanisms act through the concept
that the output of the system shuts off and reduces the original stimulus
Positive Feedback - correct answer ✔Result or response enhances or exaggerates the original stimulus
so that the output is accelerated
Homeostasis Example - correct answer ✔Variable: Fall in blood pressure below normal see point
Receptor: Pressure-Monitoring Nerve Cells
*Through Nerve Pathways
Effector: Heart and Blood Vessels
,Response: Increase in blood pressure to normal
Homestasis Example - correct answer ✔Variable: Increase in blood glucose level
Receptor: The pancreas--> Secretes Insulin
Increases glucose uptake in fat cells
Increases glycogen synthesis in liver
Decreases glucose release by liver
Response: Blood Glucose falls to normal range
Variable: Declining blood glucose level
Receptor: Pancreas--> Secretes Glucagon
Decreases glucose uptake in fat cells
Increase glycogen breakdown
Increases glucose release by liver
Blood Glucose Increases
Homeostasis Example - correct answer ✔Variable: Body Temperature Too High
Receptor: Thermoreceptors--> Brain thermoregulatory centers
Effectors: Sweat glands, Blood vessels in skin, skeletal muscles
Response: Sweat glands = sweat production--> heat loss
Blood vessels = blood flow increase--> heat loss
Variable: Body Temp too low
Receptor: Thermoreceptors--> Brain thermoregulatory centers
Effectors: Sweat glands, Blood vessels in skin, skeletal muscles
, Response: No sweat, Constriction of the blood vessels,
Skeletal muscles = Shivering = Heat generation
Exponential Growth - correct answer ✔
Exponential Decay - correct answer ✔
Doubling Time - correct answer ✔ln(2)/K
Exponential Growth Equation - correct answer ✔P(t) = P(initial)e^(kt)
P(t): Population at time
P(i): Initial population
k: Rate
t: Time
Occurs when the growth rate is proportional to the concentration of cells in an environment
Exponential Decay Equation - correct answer ✔P(t) = P(initial)e^(-kt)
P(t): Population at time
P(i): Initial population
k: Rate
t: Time
Occurs when the rate of decay is proportional to the concentration of cells in an environment
Half-Life - correct answer ✔ln(.5)/K
verified to pass 2025/2026
Homeostasis - correct answer ✔The tendency of a system to maintain internal stability, from a
coordinated approach in response to a situation or stimulus which disturbs its normal condition or
function.
**NOT EQUILIBRIUM
Feedback Control - correct answer ✔1. Variable: the imbalance/ produces change in variable
2. Receptor: Change detected by receptor
*Information sent along a pathway
3. Control Center: Brain
*Information sent on a pathway
4. Effector: Counteracts the imbalance; certain organ that responds
5. Response
Negative Feedback - correct answer ✔Most homeostatic control mechanisms act through the concept
that the output of the system shuts off and reduces the original stimulus
Positive Feedback - correct answer ✔Result or response enhances or exaggerates the original stimulus
so that the output is accelerated
Homeostasis Example - correct answer ✔Variable: Fall in blood pressure below normal see point
Receptor: Pressure-Monitoring Nerve Cells
*Through Nerve Pathways
Effector: Heart and Blood Vessels
,Response: Increase in blood pressure to normal
Homestasis Example - correct answer ✔Variable: Increase in blood glucose level
Receptor: The pancreas--> Secretes Insulin
Increases glucose uptake in fat cells
Increases glycogen synthesis in liver
Decreases glucose release by liver
Response: Blood Glucose falls to normal range
Variable: Declining blood glucose level
Receptor: Pancreas--> Secretes Glucagon
Decreases glucose uptake in fat cells
Increase glycogen breakdown
Increases glucose release by liver
Blood Glucose Increases
Homeostasis Example - correct answer ✔Variable: Body Temperature Too High
Receptor: Thermoreceptors--> Brain thermoregulatory centers
Effectors: Sweat glands, Blood vessels in skin, skeletal muscles
Response: Sweat glands = sweat production--> heat loss
Blood vessels = blood flow increase--> heat loss
Variable: Body Temp too low
Receptor: Thermoreceptors--> Brain thermoregulatory centers
Effectors: Sweat glands, Blood vessels in skin, skeletal muscles
, Response: No sweat, Constriction of the blood vessels,
Skeletal muscles = Shivering = Heat generation
Exponential Growth - correct answer ✔
Exponential Decay - correct answer ✔
Doubling Time - correct answer ✔ln(2)/K
Exponential Growth Equation - correct answer ✔P(t) = P(initial)e^(kt)
P(t): Population at time
P(i): Initial population
k: Rate
t: Time
Occurs when the growth rate is proportional to the concentration of cells in an environment
Exponential Decay Equation - correct answer ✔P(t) = P(initial)e^(-kt)
P(t): Population at time
P(i): Initial population
k: Rate
t: Time
Occurs when the rate of decay is proportional to the concentration of cells in an environment
Half-Life - correct answer ✔ln(.5)/K
