Physiology MCQ of Body Temperature

Physiology MCQ of Body Temperature

> please support this website by 1 $>>https://goo.gl/sPtHLU

 

Thepart of the brain that regulates body temperature is:

a)Pituitary

b)Thalamus

c)Hypothalamus

d)Pons

e)Cerebralcortex

 

Suddenexposure to a cold environment will cause all the following except:

a)Cutaneousvasoconstriction

b)Contractionof the erector pili muscles

c)Increasearterial blood pressure

d)Cutaneousvasodilation

e)Shivering

 

Wheneverthe body temperature is lower than the set point the following are

present except:

a)Sweating

b)Cutaneousvasoconstriction

c)Contractionof erector pili muscles

d)Acceleratedmetabolism

e)Shivering

 

Themetabolic rate is increased by all of the following except:

a)Catabolismof lactate

b)Saturationof myoglobin with O2

c)Saturationof hemoglobin with O2

d)ReplenishingATP stores

e)Replenishingphosphocreatine stores

 

Featuresof a heat stroke include all the following except:

a)Hypotension

b)Dehydration

c)LowCardiac Output

d)Excessivesweating

e)Confusion

 

Atan environmental temperature of 37o C most of the heat is lost from the

body by:

a)Radiation

b)Evaporation

c)Conduction

d)Convection

e)Conductionand Convention

 

Themetabolic rate is increased by all of the following except:

a)Risein body temperature

b)Risein environmental temperature

c)Increasedsympathetic outflow

d)Starvation

e)Hyperfunctionof the thyroid gland

 

Responsesto cold exposure include:

a)Openingof cutaneous vascular shunts

b)Increasedcardiac output

c)Decreasedcardiac output

d)Cutaneousvasoconstriction

e)Tachycardia

 

Responsesto heat and cold are:

a)Stimulationof cutaneous thermoreceptors

b)Hypothalamiccenters

c)Integrationof central & cutaneous receptor inputs

d)Monitoringof the core temperature

e)Mainlyregulated by the posterior hypothalamus

 

Heatexposure may lead to:

a)Heatsyncope due to damage to hypothalamus

b)Heatcramps due to raised core temperature

c)Heatstroke due to excess water loss

d)Heatexhaustion due to excess water & electrolyte loss

e)Dehydrationdue to failure of ADH secretion

 

Suddenexposure to a cold enviornment would lead to all the following

except:

a)Cutaneousvasoconstriction

b)Decreasedperipheral vascular resistance

c)Contractionof pili-erector muscle

d)Peripheralcyanosis

e)Decreasedskin temperature

 

Thebody temperature of a patient is 38oC and observed to be rising. The

following is true regarding this patient:

a)Heis unlikely to be sweating

b)Hismetabolic rate will be higher than normal

c)Heis unlikely to be shivering

d)Heis unlikely to have respiratory alkalosis

e)Histemperature set point is 38oC

 

Athermoregulatory response controlled primarily by sympathetic

cholinergic nerves is:

a)Shivering

b)Cutaneousvasodilation

c)Sweating

d)Cutaneousvasoconstriction

e)Piloerection

 

Whichof the following is the main customer of energy under basal

conditions?

a)Heartbeat

b)Respiratorymuscle activity

c)Sodium-potassiumpump

d)Skeletalmuscle activity

e)Pancreas

 

Apatient with a body temperature of 34oC is expected to have:

a)Highmetabolic rate

b)Lowoxygen consumption

c)Tachycardia

d)Highstroke volume

e)Highlung ventilation

> please support this website by 1 $>>https://goo.gl/sPtHLU

Files Size:: 2.1 MB

Free Download link

Thebody temperature of a febrile patient is found to be 38oC and it has been

observed that his body temperature is still rising. Regarding this patient, all of

the following are correct except that there will be:

a)Cutaneousvasoconstriction

b)Aset point higher than 38oC

c)Sweating

d)Highmetabolic rate

e)Piloerection

 

Themost important factor determining the insensible water loss is:

a)Enviornmentaltemperature

b)Humidityof the enviornment

c)Relativehumidity of the enviornment

d)Activityof the sweat glands

e)Respiratoryrate

 

Stimulationof which of the following is expected to decrease heat loss from

the body:

a)Alpha-adrenergicreceptors

b)B1-adrenergicreceptors

c)B2-adrenergicreceptors

d)Muscariniccholinergic receptors

e)Nicotiniccholinergic receptors

 

Thebody temperature of a febrile patient is observed to be decreasing. This

subject is expected now to:

a)Besweating

b)Beshivering

c)Havelower than normal metabolic rate

d)Tohave piloerection

e)Bradycardia

 

Thebasal metabolic rate:

a)Isabout 50 kcal/m2/hour in males

b)Perkg lean body mass is equal in males and females

c)Increaseswith age

d)Islow in febrile patients

e)Isbest measured when the subject is sleeping

 

Inthe thermal balance equation the following is always positive:

a)Conduction

b)Evaporation

c)Metabolicheat production

d)Radiation

e)Convection

 

Evaporatingone liter of sweat glands leads to:

a)Increasedosmolarity of the ECF

b)Decreasedosmolarity of plasma

c)Lossof 1000 kcal of heat

d)Decreasesplasma viscosity

e)Noneof the above

 

Thebasal metabolic rate (per m2 surface area) is expected to be higher in:

a)Obesefemales than lean females

b)Leanmales than obese males

c)Elderlythan young adults

d)Elephantsthan rats

e)Adultsthan children

 

Thethermoregulatory response that can be blocked by atropine is:

a)Shivering

b)Cutaneousvasodilation

c)Sweating

d)Cutaneousvasoconstriction

e)Piloerection

 

Apatient with a body temperature of 39oC is expected to have:

a)Alow metabolic rate

b)Lowoxygen consumption

c)Tachycardia

d)Lowstroke volume

e)Hypoventilation

 

Therespiratory quotient:

a)Forfats is greater than for carbohydrates

b)Ofthe human brain is about 7 at rest

c)Ofskeletal muscle is close to 1 at rest

d)Ofcarbohydrates is 1

e)Isequal to amount of oxygen consumed divided by carbon dioxide

produced

 

Heatexhaustion differs from heat stroke in that in heat exhaustion there is:

a)Hypotension

b)Tachycardia

c)Moistskin

d)Lowcardiac output

e)Extensivecutaneous vasoconstriction

 

Allof the following statements about brown fat are true except:

a)Ithas numerous mitochondria and a rich blood supply

b)Itproduces a lot of heat but little ATP

c)Itis important for heat production in adults

d)Itis abundantly innervated by the sympathetic nervous system

e)Itis abundant in the upper part of the body

 

Shiveringand vasoconstriction best describe which of the following:

a)Hypotension

b)Onsetof fever

c)Sustainedfever

d)Rapidreduction of temperature set point

e)Hyperthyroidism

 

Whichof the following is not at core body temperature:

a)Thebrain

b)Thehypothalamus

c)Theblood

d)Thetestes

e)Theliver

 

Thebody temperature of a febrile patient is observed to be gradually

declining. This subject:

a)Unlikelyto be sweating

b)Heatproduction is greater than heat loss

c)Islikely to be shivering

d)Islikely to have cutaneous vasodilation

e)Isexpected to complain of chills

 

Sweat:

a)Isa filtrate

b)Isusually isotonic to plasma

c)Haslow sodium concentration when flow rate is slow

d)Haslow sodium concentration in un-acclimatized compared to acclimatized

people

e)Evaporationdepends primarily on air temperature

 

Thebasal metabolic rate:

a)Isabout 40 kcal/m2/hour in an average adult man

b)Ishigher than normal in hypothermic people

c)Ishigher in obese than lean subjects per unit body weight

d)Shouldbe measured when the subject is asleep

e)Shouldbe measured at room temperature of 37oC

>> please support this website by 1 $>>https://goo.gl/sPtHLU

Related Post

Sharing the knowledge!
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  

Be the first to comment

Leave a Reply

Your email address will not be published.


*