Quiz
Chapter 1 Homeostasis and Fundamental Cell Physiology
Perguntas do quiz (17)
1________ occurs when the driver ion and molecule move in opposite directions across the plasma membrane
- ACarrier-mediated facilitated diffusion
- BChannel-mediated facilitated diffusion
- CPrimary Active Transport
- DCotransport (symport)
- Ecountertransport (antiport)
2Which of the following are considered unassisted membrane transport mechanisms?
- Asimple diffusion
- BCarrier-mediated facilitated diffusion
- CChannel-mediated facilitated diffusion
- DPrimary Active Transport
- ESecondary Active Transport
3Which of the following molecules are able to permeate a cell membrane?
- Asteroids
- Bglucose
- Cions
- Dmethanol
- Ecomplex amino acids
4Crenation of a cell would be observed if it was placed in which of the following solutions?
- AHypotonic
- BHypertonic
- Cisotonic
- Dboth hypotonic and hypertonic
- Eboth isotonic and hypotonic
5Which of the following constitutes Fick's law of diffusion?
- ALipid solubility of substance
- BMolecular weight of substance
- Cdistance a substance has to travel to cross the membrane
- Dmagnitude of the concentration gradient
- Esurface area of the membrane
6_____________ occurs when the response made by the effector amplifies the changes in the controlled variable cause by a stimulus
- ANegative feedback mechanism
- Bpositive feedback mechanism
- CFeed forward Mechanism
- DAllostasis
- EPositive feedback and feed forward mechanism
7_______ is driven by the direct use of ATP to transport a molecule against its concentration
- ASimple diffusion
- BCarrier-mediated facilitated diffusion
- CChannel-mediated facilitated diffusion
- DPrimary Active Transport
- ESecondary Active Transport
8Shivering and sweating are examples of which of the following?
- Apositive feedback
- Bnegative feedback
- Csensory mechanisms
- Deffector mechanisms
- Eset points
- Fnegative feedback and effector mechanisms
9Movement of a substance into a cell against its concentration gradient is caused by _____
- Asimple diffusion
- Bchannel-mediated facilitated diffusion
- Cosmosis
- Dprimary active transport
- ECarrier-mediated facilitated diffusion
10Eating a bag of salted potato chips without increasing sodium excretion would result in what sate
- APositive sodium balance
- BNegative sodium balance
- CStable sodium balance
- Dnegative glucose balance
- EIt can't be determined
11Which of the following are true of a cell (330m Osm internal environment ) placed in a 500mOsm salt solution?
- AThe cell is hypertonic to the solution
- BThe cell is hypotonic to the solution
- CThe cell is isotonic to the solution
- DThe solution exerts a higher osmotic potential than the cell
- EThe cell exerts a higher osmotic potential than the solution
12________ occurs when the driver ion and molecule move in opposite directions across the plasma membrane
- ACarrier-mediated facilitated diffusion
- Bchannel-mediated facilitated diffusion
- Cprimary active transport
- DCotransport (symport)
- Ecountertransport (antiport)
13Which of the following is an example of positive feedback in the body?
- Ablood clotting
- Breturn of blood pressure to normal after hemorrhage
- Cincreased respiration rate caused by accumulation of CO2 in the blood
- Ddecreased sympathetic nervous system activity that occurs in response to increased blood pressure
- Ee)all of the above
14_______ is driven by the direct use of ATP to transport a molecule against its concentration
- Asimple diffusion
- BCarrier-mediated facilitated diffusion
- Cchannel-mediated facilitated diffusion
- Dprimary active transport
- Esecondary active transport
15Homeostasis is the static constancy of the internal physiological environment
- AVerdadeiro
- BFalso
16Active transport is the movement of a solute against its concentration gradient at the cost of energy
- AVerdadeiro
- BFalso
17When two solutions are isotonic to each other there is non net movement of water
- AVerdadeiro
- BFalso
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- Physiology Lab at the University of Central Florida
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- tiwariashley
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