HES 403 EXAM 1 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question:
ch1
Answer:
Question:
what is work? what is the equation
Answer:
- work is force x distance
Question:
what is power? what is the equation
Answer:
- power is work / time
Question:
what is direct calorimetry
Answer:
measuring energy usage by change in body temperature
Question:
what is indirect calorimetry
Answer:
measuring energy usage by change in breathing rates and concentrations
(mostly O2 and CO2)
Question:
what is inspired O2 usually?
Answer:
20.93% or .2093
Question:
what does a MET equal in VO2? (ml/kg/min)
Answer:
3.5 ml/kg/min
Question:
what is % net efficiency? what is equation
Answer:
1. the mathematical ratio of work output by the energy expended
2. equation: work output / energy expended x 100%
Question:
ch2
Answer:
Question:
what is homeostasis
, Answer:
the maintenance of a relatively constant internal environment
Question:
what is steady state
Answer:
a steady and unchanging level of some physiological value (e.g., heart rate, O2
consumption)
Question:
what is positive feedback
Answer:
control mechanisms act to increase the original stimulus (e.g., oxytocin while
in labor) in search of homeostasis
Question:
what is negative feedback
Answer:
control mechanisms act to decrease the original stimulus in search of
homeostasis
Question:
what is "gain"
Answer:
the precision with which a control system maintains homeostasis is called the
"gain" of the system
Question:
what are the (5) diff. types of cell signaling
Answer:
1. intracrine
2. autocrine
3. juxtacrine
4. endocrine
5. paracrine
Question:
what is intracrine
Answer:
cell signaling where the signal doesn't leave the cell it started in
Question:
what is autocrine
Answer:
cell signaling where the signal leaves the cell, enters the extracellular space,
and reenters the cell it was created in
Question:
what is juxtacrine
Answer:
cell signaling where the signal travels to an adjacent cell
CORRECT ANSWERS
Question:
ch1
Answer:
Question:
what is work? what is the equation
Answer:
- work is force x distance
Question:
what is power? what is the equation
Answer:
- power is work / time
Question:
what is direct calorimetry
Answer:
measuring energy usage by change in body temperature
Question:
what is indirect calorimetry
Answer:
measuring energy usage by change in breathing rates and concentrations
(mostly O2 and CO2)
Question:
what is inspired O2 usually?
Answer:
20.93% or .2093
Question:
what does a MET equal in VO2? (ml/kg/min)
Answer:
3.5 ml/kg/min
Question:
what is % net efficiency? what is equation
Answer:
1. the mathematical ratio of work output by the energy expended
2. equation: work output / energy expended x 100%
Question:
ch2
Answer:
Question:
what is homeostasis
, Answer:
the maintenance of a relatively constant internal environment
Question:
what is steady state
Answer:
a steady and unchanging level of some physiological value (e.g., heart rate, O2
consumption)
Question:
what is positive feedback
Answer:
control mechanisms act to increase the original stimulus (e.g., oxytocin while
in labor) in search of homeostasis
Question:
what is negative feedback
Answer:
control mechanisms act to decrease the original stimulus in search of
homeostasis
Question:
what is "gain"
Answer:
the precision with which a control system maintains homeostasis is called the
"gain" of the system
Question:
what are the (5) diff. types of cell signaling
Answer:
1. intracrine
2. autocrine
3. juxtacrine
4. endocrine
5. paracrine
Question:
what is intracrine
Answer:
cell signaling where the signal doesn't leave the cell it started in
Question:
what is autocrine
Answer:
cell signaling where the signal leaves the cell, enters the extracellular space,
and reenters the cell it was created in
Question:
what is juxtacrine
Answer:
cell signaling where the signal travels to an adjacent cell
