Chapter 1 Homeostasis and Fundamental Cell Physiology

Question 1

Question

________ occurs when the driver ion and molecule move in opposite directions across the plasma membrane

Answer

Carrier-mediated facilitated diffusion
Channel-mediated facilitated diffusion
Primary Active Transport
Cotransport (symport)
countertransport (antiport)

Question 2

Question

Which of the following are considered unassisted membrane transport mechanisms?

Answer

simple diffusion
Carrier-mediated facilitated diffusion
Channel-mediated facilitated diffusion
Primary Active Transport
Secondary Active Transport

Question 3

Question

Which of the following molecules are able to permeate a cell membrane?

Answer

steroids
glucose
ions
methanol
complex amino acids

Question 4

Question

Crenation of a cell would be observed if it was placed in which of the following solutions?

Answer

Hypotonic
Hypertonic
isotonic
both hypotonic and hypertonic
both isotonic and hypotonic

Question 5

Question

Which of the following constitutes Fick's law of diffusion?

Answer

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

Question 6

Question

_____________ occurs when the response made by the effector amplifies the changes in the controlled variable cause by a stimulus

Answer

Negative feedback mechanism
positive feedback mechanism
Feed forward Mechanism
Allostasis
Positive feedback and feed forward mechanism

Question 7

Question

_______ is driven by the direct use of ATP to transport a molecule against its concentration

Answer

Simple diffusion
Carrier-mediated facilitated diffusion
Channel-mediated facilitated diffusion
Primary Active Transport
Secondary Active Transport

Question 8

Question

Shivering and sweating are examples of which of the following?

Answer

positive feedback
negative feedback
sensory mechanisms
effector mechanisms
set points
negative feedback and effector mechanisms

Question 9

Question

Movement of a substance into a cell against its concentration gradient is caused by _____

Answer

simple diffusion
channel-mediated facilitated diffusion
osmosis
primary active transport
Carrier-mediated facilitated diffusion

Question 10

Question

Eating a bag of salted potato chips without increasing sodium excretion would result in what sate

Answer

Positive sodium balance
Negative sodium balance
Stable sodium balance
negative glucose balance
It can't be determined

Question 11

Question

Which of the following are true of a cell (330m Osm internal environment ) placed in a 500mOsm salt solution?

Answer

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

Question 12

Question

________ occurs when the driver ion and molecule move in opposite directions across the plasma membrane

Answer

Carrier-mediated facilitated diffusion
channel-mediated facilitated diffusion
primary active transport
Cotransport (symport)
countertransport (antiport)

Question 13

Question

Which of the following is an example of positive feedback in the body?

Answer

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

Question 14

Question

_______ is driven by the direct use of ATP to transport a molecule against its concentration

Answer

simple diffusion
Carrier-mediated facilitated diffusion
channel-mediated facilitated diffusion
primary active transport
secondary active transport

Question 15

Question

Homeostasis is the static constancy of the internal physiological environment

Answer

True
False

Question 16

Question

Active transport is the movement of a solute against its concentration gradient at the cost of energy

Answer

True
False

Question 17

Question

When two solutions are isotonic to each other there is non net movement of water

Answer

True
False

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Chapter 1 Homeostasis and Fundamental Cell Physiology

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