Physiology exam

Pregunta 1 de 30

1

Regarding the transcellular fluid ?

Selecciona una de las siguientes respuestas posibles:

Its volume can reach up to 5% of TBW in some normal humans
Its volume is affected by dehydration and overhydration .
t is a specialized type of ICF
it is the same as interstitial fluid
Its compositions differs markedly from that of plasma and interstitial fluid .

Explicación

Pregunta 2 de 30

1

A normal subject with 37.5 C body temperature , exposed to overheating , his temperature is increased to 37.8 C , if his thermostatic control is impair his body temperature is increase to 43.5 , what is the gain of his control system ?

Selecciona una de las siguientes respuestas posibles:

-6
-7.5
-40
-19
-30

Explicación

Pregunta 3 de 30

1

Hyperglycemia(too much glucose in blood) causes insulin release , formation of glycogen by the liver and glucose urea , this combination represent :

Selecciona una de las siguientes respuestas posibles:

The gain of the feedback mechanism
Negative feedback mechanism
Positive feedback mechanism
Integrated response
Disturbance of feedback control

Explicación

Pregunta 4 de 30

1

Treatment of the disease can be done by all of the following EXCEPT

Selecciona una de las siguientes respuestas posibles:

Potentiating(strengthening) of the positive feedback mechanism
Blocking the positive feedback mechanism
Helping the negative feedback mechanism
Helping the organ to increase its function
Blocking the stimulus of the feedback mechanism

Explicación

Pregunta 5 de 30

1

The osmolarity of a solution formed of 1L of water containing ; 1 mol of each glucose , NaOH , Al(OH)3 :

Selecciona una de las siguientes respuestas posibles:

30 mOsm/L
1 mOsm/L
3 mOsm/L
4 mOsm/L
7 mOsm/L

Explicación

Pregunta 6 de 30

1

Which of the following mechanism is not rate limited by Vmax

Selecciona una de las siguientes respuestas posibles:

Transport of glucose across the cell membran
Transport of CO2 across the cell membrane
Transport of Na ion through Na-K pump
Co-transport of Cl ion through Na-Cl channel
Counter transport of H+ and K+ by H+ pump

Explicación

Pregunta 7 de 30

1

Diffusion of blood gasses across the cell membrane is affected by all the following EXCEPT

Selecciona una de las siguientes respuestas posibles:

The osmotic pressure
The partial pressure of the specific gas
The concentration gradient
The temperature
The kinetic energy

Explicación

Pregunta 8 de 30

1

Which one of the following has the highest (mOsm) in 1 L of plasma

Selecciona una de las siguientes respuestas posibles:

2 millimole of fructose
1 millimole of KCl
5 millimole of glucose
2 millimole of CaCl2
2 millimole of albumin

Explicación

Pregunta 9 de 30

1

Which of the following solutions when infused intravenously would result in an increase in extracellular fluid volume, a decrease in intracellular fluid volume, and an increase in total body water after osmotic equilibrium?
(isotonic % of solutes in cells is 0.9%)

Selecciona una de las siguientes respuestas posibles:

1 L of 0.9% sodium chloride solution
1 L of 0.45% sodium chloride solution
1 L of 3% sodium chloride solution
1 L of 5% fructose solution
1 L of pure water

Explicación

Pregunta 10 de 30

1

An increase in which of the following would be expected to decrease blood flow in a vessel

Selecciona una de las siguientes respuestas posibles:

Pressure gradient across the vessel
Radius of the vessel
Plasma colloid osmotic pressure
Viscosity of the blood
Plasma sodium concentration

Explicación

Pregunta 11 de 30

1

Which blood vessel has the highest vascular resistance

Selecciona una de las siguientes respuestas posibles:

Blood flow (ml/min) pressure gradient (mm Hg)

1000 100
Blood flow (ml/min) pressure gradient (mm Hg)
1200 60
Blood flow (ml/min) pressure gradient (mm Hg)
1400 20
Blood flow (ml/min) pressure gradient (mm Hg)
1600 80
Blood flow (ml/min) pressure gradient (mm Hg)
1800 40

Explicación

Pregunta 12 de 30

1

Nernst equation

Selecciona una de las siguientes respuestas posibles:

Calculates the diffusion potential .
Calculates the membrane potential under the effect of more than one ion
Calculates the equilibrium potential for one ion at a time
Calculates the equilibrium potential of K ion to be about 61 mV
Calculates the equilibrium potential of Na ion to be about - 94 mV

Explicación

Pregunta 13 de 30

1

A person with normal body fluid volumes weighs 60 kg and has an extracellular fluid volume of approximately 12.8 L, a blood volume of 4.3 L, and a hematocrit of 0.4; 57% of his body weight is water.

What is the approximate interstitial fluid volume?

Selecciona una de las siguientes respuestas posibles:

6.4 L
8.4 L
10.2 L
11.3 L
12.0 L

Explicación

Pregunta 14 de 30

1

The diameter of a precapillary arteriole is increased in a muscle vascular bed. A decrease in which of the following would be expected

Selecciona una de las siguientes respuestas posibles:

Capillary filtration rate
Vascular conductance
Capillary blood flow
Capillary hydrostatic pressure
Arteriolar resistance

Explicación

Pregunta 15 de 30

1

A man with lean body mass of 65 kg was injected with 10ml of water with 1% of it being labelled liquid with the same density as water. After that blood plasma was sampled and found to contain 0.037 mg/ml of labelled liquid. What is the volume of plasma?

Selecciona una de las siguientes respuestas posibles:

2.70 litres
0.27 litres
27 litres
5 litres

Explicación

Pregunta 16 de 30

1

After we have measured the extracellular fluid volume of this man.What is the most suitable way to measure volume of intracellular fluid?

Selecciona una de las siguientes respuestas posibles:

Use sodium as a label to find volume by law of mass conservation
Use potassium ions as a label to find volume by law of mass conservation
Use labelled water as a label to find volume by law of mass conservation
There is no need for labels.Volume of extracellular fluid can be found by subtracting extracellular volume from total body water volume

Explicación

Pregunta 17 de 30

1

Which of the following is the most serious consequence of Hyponatremia-dehydration?

Selecciona una de las siguientes respuestas posibles:

diarrhea
sweating
breathing problems
intracellular edema in cerebellar cells(herniation),which causes very painful pressure on nerves

Explicación

Pregunta 18 de 30

1

What is the most serious consequence of hypernatremia?

Selecciona una de las siguientes respuestas posibles:

tear in blood vessels and hemorrhage
skin turgor
weight loss
tachycardia

Explicación

Pregunta 19 de 30

1

Edema can be caused by all of these factors except

Selecciona una de las siguientes respuestas posibles:

an increase in the plasma protein concentration
obstruction of lymphatic vessels
increased capillary permeability because of inflammation
increased venous pressure

Explicación

Pregunta 20 de 30

1

The resting membrane potential

Selecciona una de las siguientes respuestas posibles:

occurs only in nerve and muscle cells
Is the same in all cells
is oriented so that the cell’s interior is positive with respect to the extracellular fluid
requires the movement and diffusion of all ions of cells
none of the above

Explicación

Pregunta 21 de 30

1

Which of the following statements about the rate at which action potential travels in neurons is true?

Selecciona una de las siguientes respuestas posibles:

The direction of its travel is unidirectional(spreads to one direction only)
It is faster for a strong stimulus than a weak one
It is faster for myelinated fibres than in non-myelinated ones
a and c
a,b,and c

Explicación

Pregunta 22 de 30

1

Which of the following will not decrease of we cut a limp

Selecciona una de las siguientes respuestas posibles:

Cardiac output
total vascular conductance
Resistance of each blood vessel
all of the above
none of the above

Explicación

Pregunta 23 de 30

1

Which of the following is/are true about turbulence?

Selecciona una de las siguientes respuestas posibles:

It is less likely to occur at low flow than at a high flow
Turbulence would more likely occur at a large vessel than in a small vessel
For a fixed flow,turbulence is most likely to occur in a high viscosity fluid than in a low viscosity fluid
Turbulence is noisier than laminar flow
a and d

Explicación

Pregunta 24 de 30

1

The main factor responsible for the high viscosity of blood is the small non-cellular proteins dissolved in the plasma

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 25 de 30

1

Which statement about action potential is false

Selecciona una de las siguientes respuestas posibles:

only a relatively small number of Na+ and K+ions actually diffuse across the membrane
The production and spread of action potential is an example of both positive feedback and negative feedback
During the production of action potential.Na+ and K+ total concentration( both intracellular concentration and extracellular concentration of one ion added together)does not change
Na+/K+ pumps are directly involved in creating the action potential
all of the above

Explicación

Pregunta 26 de 30

1

If resistance in a blood vessel has doubled, but flow has change,then the pressure difference at the ends of the tube must be the double also

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 27 de 30

1

How can a cell be compared to solution containing 400 mOSM of urea only

Selecciona una de las siguientes respuestas posibles:

urea is iso-osmotic but hypertonic
urea is hyperosmotic but hypotonic
urea is hyperosmotic and hypertonic
Urea is hypo-osmotic and hypotonic

Explicación

Pregunta 28 de 30

1

Which of the following affects proportions of body fluids to each other

Selecciona una de las siguientes respuestas posibles:

%of body fat
Size of the body
Sleeping
Change in solute concentration inside cells

Explicación

Pregunta 29 de 30

1

The membrane potential will depolarize by the greatest amount if the membrane permeability increases for

Selecciona una de las siguientes respuestas posibles:

Potassium
Sodium and potassium
Chloride
Potassium and chloride
Sodium

Explicación

Pregunta 30 de 30

1

A cell present on a dish in a lab has an osmolarity of 300osm/l.while a soltion on another table has an osmolarity of 200 osm/l.The cell (in comparision to solution)is

Selecciona una de las siguientes respuestas posibles:

hyperosmolar
hypo-osmolar
hypertonic
hypotonic

	Creado por Ahmed Almohtaseb hace más de 9 años

Test sobre Physiology exam, creado por Ahmed Almohtaseb el 27/02/2017.

Physiology exam

Physiology exam

Pregunta 1 de 30

Regarding the transcellular fluid ?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 30

A normal subject with 37.5 C body temperature , exposed to overheating , his temperature is increased to 37.8 C , if his thermostatic control is impair his body temperature is increase to 43.5 , what is the gain of his control system ?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 30

Hyperglycemia(too much glucose in blood) causes insulin release , formation of glycogen by the liver and glucose urea , this combination represent :

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 30

Treatment of the disease can be done by all of the following EXCEPT

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 5 de 30

The osmolarity of a solution formed of 1L of water containing ; 1 mol of each glucose , NaOH , Al(OH)3 :

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 6 de 30

Which of the following mechanism is not rate limited by Vmax

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 30

Diffusion of blood gasses across the cell membrane is affected by all the following EXCEPT

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 30

Which one of the following has the highest (mOsm) in 1 L of plasma

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 30

Which of the following solutions when infused intravenously would result in an increase in extracellular fluid volume, a decrease in intracellular fluid volume, and an increase in total body water after osmotic equilibrium? (isotonic % of solutes in cells is 0.9%)

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 30

An increase in which of the following would be expected to decrease blood flow in a vessel

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 11 de 30

Which blood vessel has the highest vascular resistance

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 12 de 30

Nernst equation

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 13 de 30

A person with normal body fluid volumes weighs 60 kg and has an extracellular fluid volume of approximately 12.8 L, a blood volume of 4.3 L, and a hematocrit of 0.4; 57% of his body weight is water. What is the approximate interstitial fluid volume?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 14 de 30

The diameter of a precapillary arteriole is increased in a muscle vascular bed. A decrease in which of the following would be expected

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 15 de 30

A man with lean body mass of 65 kg was injected with 10ml of water with 1% of it being labelled liquid with the same density as water. After that blood plasma was sampled and found to contain 0.037 mg/ml of labelled liquid. What is the volume of plasma?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 16 de 30

After we have measured the extracellular fluid volume of this man.What is the most suitable way to measure volume of intracellular fluid?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 17 de 30

Which of the following is the most serious consequence of Hyponatremia-dehydration?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 18 de 30

What is the most serious consequence of hypernatremia?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 19 de 30

Edema can be caused by all of these factors except

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 20 de 30

Which of the following solutions when infused intravenously would result in an increase in extracellular fluid volume, a decrease in intracellular fluid volume, and an increase in total body water after osmotic equilibrium?
(isotonic % of solutes in cells is 0.9%)

A person with normal body fluid volumes weighs 60 kg and has an extracellular fluid volume of approximately 12.8 L, a blood volume of 4.3 L, and a hematocrit of 0.4; 57% of his body weight is water.

What is the approximate interstitial fluid volume?