3736936
Descripción
Test por tiwariashley, actualizado hace más de 1 año
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Creado por tiwariashley
hace alrededor de 9 años
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Pregunta 1
Pregunta
________ occurs when the driver ion and molecule move in opposite directions across the plasma membrane
Respuesta
-
Carrier-mediated facilitated diffusion
-
Channel-mediated facilitated diffusion
-
Primary Active Transport
-
Cotransport (symport)
-
countertransport (antiport)
Pregunta 2
Pregunta
Which of the following are considered unassisted membrane transport mechanisms?
Respuesta
-
simple diffusion
-
Carrier-mediated facilitated diffusion
-
Channel-mediated facilitated diffusion
-
Primary Active Transport
-
Secondary Active Transport
Pregunta 3
Pregunta
Which of the following molecules are able to permeate a cell membrane?
Respuesta
-
steroids
-
glucose
-
ions
-
methanol
-
complex amino acids
Pregunta 4
Pregunta
Crenation of a cell would be observed if it was placed in which of the following solutions?
Respuesta
-
Hypotonic
-
Hypertonic
-
isotonic
-
both hypotonic and hypertonic
-
both isotonic and hypotonic
Pregunta 5
Pregunta
Which of the following constitutes Fick's law of diffusion?
Respuesta
-
Lipid solubility of substance
-
Molecular weight of substance
-
distance a substance has to travel to cross the membrane
-
magnitude of the concentration gradient
-
surface area of the membrane
Pregunta 6
Pregunta
_____________ occurs when the response made by the effector amplifies the changes in the controlled variable cause by a stimulus
Respuesta
-
Negative feedback mechanism
-
positive feedback mechanism
-
Feed forward Mechanism
-
Allostasis
-
Positive feedback and feed forward mechanism
Pregunta 7
Pregunta
_______ is driven by the direct use of ATP to transport a molecule against its concentration
Respuesta
-
Simple diffusion
-
Carrier-mediated facilitated diffusion
-
Channel-mediated facilitated diffusion
-
Primary Active Transport
-
Secondary Active Transport
Pregunta 8
Pregunta
Shivering and sweating are examples of which of the following?
Respuesta
-
positive feedback
-
negative feedback
-
sensory mechanisms
-
effector mechanisms
-
set points
-
negative feedback and effector mechanisms
Pregunta 9
Pregunta
Movement of a substance into a cell against its concentration gradient is caused by _____
Respuesta
-
simple diffusion
-
channel-mediated facilitated diffusion
-
osmosis
-
primary active transport
-
Carrier-mediated facilitated diffusion
Pregunta 10
Pregunta
Eating a bag of salted potato chips without increasing sodium excretion would result in what sate
Respuesta
-
Positive sodium balance
-
Negative sodium balance
-
Stable sodium balance
-
negative glucose balance
-
It can't be determined
Pregunta 11
Pregunta
Which of the following are true of a cell (330m Osm internal environment ) placed in a 500mOsm salt solution?
Respuesta
-
The cell is hypertonic to the solution
-
The cell is hypotonic to the solution
-
The cell is isotonic to the solution
-
The solution exerts a higher osmotic potential than the cell
-
The cell exerts a higher osmotic potential than the solution
Pregunta 12
Pregunta
________ occurs when the driver ion and molecule move in opposite directions across the plasma membrane
Respuesta
-
Carrier-mediated facilitated diffusion
-
channel-mediated facilitated diffusion
-
primary active transport
-
Cotransport (symport)
-
countertransport (antiport)
Pregunta 13
Pregunta
Which of the following is an example of positive feedback in the body?
Respuesta
-
blood clotting
-
return of blood pressure to normal after hemorrhage
-
increased respiration rate caused by accumulation of CO2 in the blood
-
decreased sympathetic nervous system activity that occurs in response to increased blood pressure
-
e)all of the above
Pregunta 14
Pregunta
_______ is driven by the direct use of ATP to transport a molecule against its concentration
Respuesta
-
simple diffusion
-
Carrier-mediated facilitated diffusion
-
channel-mediated facilitated diffusion
-
primary active transport
-
secondary active transport
Pregunta 15
Pregunta
Homeostasis is the static constancy of the internal physiological environment
Respuesta
- True
- False
Pregunta 16
Pregunta
Active transport is the movement of a solute against its concentration gradient at the cost of energy
Respuesta
- True
- False
Pregunta 17
Pregunta
When two solutions are isotonic to each other there is non net movement of water
Respuesta
- True
- False
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