PSYB64 Chapter 9 Questions Fully
Solved.
homeostasis - Answer a physiological state of equilibrium or balance
set point - Answer a value that is defended by regulatory systems, such as core temperature
or a particular body weight
motivation - Answer the process of activating and directing behavior
endotherm - Answer an animal that can use internal methods, such as perspiration or
shivering to maintain body temperature
ectotherm - Answer an animal that relies on external methods, such as moving into the sun
or shade for maintaining body temperature
fever - Answer a carefully controlled increase in the body's thermal set point that is often
helpful in ridding the body of disease-causing organisms
pyrogen - Answer a chemical produced by bacteria or viruses that contributes to the
production of a fever
hyperthermia - Answer a life-threatning condition in which core body temperature increases
beyond normal limits in an uncontrolled manner, temperature above 40
• Strenuous activity in hot environments
hypothermia - Answer a potentially fatal core body temperature below 31 degrees C
• Can be used medically to reduce brain damage from cardiac arrest
preoptic area - Answer a part of the hypothalamus involved in a number of regulatory
functions
o triggers responses to heat (panting, sweating, BV dilation)
solute - Answer a chemical dissolved in a solution
solution - Answer a fluid containing solutes
• Most bodily fluids are made up of solutes, electrolytes
, • blood
electrolyte - Answer a substance that has broken up into ions in a solution
• Sodium
interstitial fluid - Answer a type of extracellular fluid surrounding the body's cells (26% of
body's water)
isotonic - Answer having the same concentration of solutes as a reference solution
• Concentrations of potassium and sodium are equal
• IV fluid is made up of this
osmosis - Answer the movement of water to equalize concentration on the two sides of a
membrane
• Maintains the balance and reduces movement of fluid in and out of cells
• Water moves to equalize concentrations of the solutes
• Water moves towards hypertonic conditions
hypotonic - Answer having a relatively lower concentration of solutes than a reference
solution
hypertonic - Answer having a relatively higher concentration of solutes than a reference
solution
kidney - Answer one of a pair of structures located in the lower back responsible for
maintaining fluid balance and for producing urine
osmotic thirst - Answer thirst produced by cellular dehydration
• More common mechanism
hypovolemic thirst - Answer third that results from a decrease in the volume of the
extracellular fluid
• Drops in blood volume
diabetes mellitus - Answer a disease characterized by insulin deficiency, resulting in hunger,
excess in blood and urine, and extreme thirst
• Cannot move sugars out of blood, causes blood to by hypertonic
Solved.
homeostasis - Answer a physiological state of equilibrium or balance
set point - Answer a value that is defended by regulatory systems, such as core temperature
or a particular body weight
motivation - Answer the process of activating and directing behavior
endotherm - Answer an animal that can use internal methods, such as perspiration or
shivering to maintain body temperature
ectotherm - Answer an animal that relies on external methods, such as moving into the sun
or shade for maintaining body temperature
fever - Answer a carefully controlled increase in the body's thermal set point that is often
helpful in ridding the body of disease-causing organisms
pyrogen - Answer a chemical produced by bacteria or viruses that contributes to the
production of a fever
hyperthermia - Answer a life-threatning condition in which core body temperature increases
beyond normal limits in an uncontrolled manner, temperature above 40
• Strenuous activity in hot environments
hypothermia - Answer a potentially fatal core body temperature below 31 degrees C
• Can be used medically to reduce brain damage from cardiac arrest
preoptic area - Answer a part of the hypothalamus involved in a number of regulatory
functions
o triggers responses to heat (panting, sweating, BV dilation)
solute - Answer a chemical dissolved in a solution
solution - Answer a fluid containing solutes
• Most bodily fluids are made up of solutes, electrolytes
, • blood
electrolyte - Answer a substance that has broken up into ions in a solution
• Sodium
interstitial fluid - Answer a type of extracellular fluid surrounding the body's cells (26% of
body's water)
isotonic - Answer having the same concentration of solutes as a reference solution
• Concentrations of potassium and sodium are equal
• IV fluid is made up of this
osmosis - Answer the movement of water to equalize concentration on the two sides of a
membrane
• Maintains the balance and reduces movement of fluid in and out of cells
• Water moves to equalize concentrations of the solutes
• Water moves towards hypertonic conditions
hypotonic - Answer having a relatively lower concentration of solutes than a reference
solution
hypertonic - Answer having a relatively higher concentration of solutes than a reference
solution
kidney - Answer one of a pair of structures located in the lower back responsible for
maintaining fluid balance and for producing urine
osmotic thirst - Answer thirst produced by cellular dehydration
• More common mechanism
hypovolemic thirst - Answer third that results from a decrease in the volume of the
extracellular fluid
• Drops in blood volume
diabetes mellitus - Answer a disease characterized by insulin deficiency, resulting in hunger,
excess in blood and urine, and extreme thirst
• Cannot move sugars out of blood, causes blood to by hypertonic
