M1 Active and Passive Transport

Multiple Choice

Getting rid of waste

• Excretion
• Digestion
• Ingestion
• Transport

Multiple Choice

The term used to describe when some molecules are able to pass through a membrane and others are not.

• Osmosis
• Diffusion
• Selective Permeability
• Equilibrium

Multiple Choice

When molecules move from an area of high concentration to an area of low concentration.

• Osmosis
• Selective Permeability
• Equilibrium
• Diffusion

​A Concentration Gradient is like a hill

​High concentration flows to low concentration, like rolling down a hill--from high concentration--alot of molecules to a low concentration

Multiple Choice

Homeostasis

• allows for a wildly fluctuating internal environment
• is impossible in vertebrates
• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
• is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation

​Comparison of Hypotonic, Isotonic, Hypertonic

​Hypotonic-- like hypodermic needle, the number of solute/sugar/other molecules is less than what's outside the cell, so water comes into the cell

​

​Isotonic--the number of solute/sugar/other molecules equals what's outside--so water is equal.

​

​Hypertonic--more solute/sugar/other molecules outside cell than inside so water leaves the cell.

Multiple Choice

Passive transport moves material __________ its concentration gradient. While active transport moves substances ___________ its concentration gradient.

• down, against

• against, down

• down, down

• up, up

Multiple Choice

The term used to describe the diffusion of water.

• Diffusion
• Osmosis
• Selective Permeability
• Equilibrium

Multiple Choice

A cell in an isotonic solution will

• swell
• shrink
• stay the same size
• impossible to tell

Multiple Choice

Why are water molecules able to enter the egg but NOT the sugar molecules?

• Sugar molecules are too heavy.

• The holes of the semi-permeable membrane were too small to let sugar molecules through.

• Semi-permeable membranes need energy.

• Semi-permeable membranes must be under pressure to work.

Multiple Choice

Hypotonic solutions

• make cells shrink

• make cells swell

Multiple Choice

The cell below is in a _____________ solution.

• Hypertonic
• Hypotonic
• Isotonic

Multiple Choice

The cell below is in a _________ solution.

• Hypotonic
• Hypertonic
• Isotonic

Multiple Choice

Diffusion & Facilitated Diffusion are both __________ transport.

• Passive

• Active

• Easy

• Free

Multiple Choice

What is the movement of particles with the concentration gradient using protein "helpers"?

• diffusion

• facilitated diffusion

• active transport

• enzymatic reactions

Multiple Choice

What is a difference between diffusion and facilitated diffusion?

• movement of particles from [high] to [low]

• a protein "helper"

• movement of particles from [low] to [high]

• energy

Multiple Choice

Endocytosis is defined as

• the movement of large molecules from the inside of the cell to the outisde of the cell using channel proteins. 
• the movement of large molecules from the inside of the cell to the outisde of the cell membrane vesciles. 
•  the movement of large molecules from the outside of the cell to the inside of the cell using membrane vesciles.
• the movement of large molecules from the outside of the cell to the inside of the cell using channel proteins. 

Multiple Choice

Exocytosis is the movement of

• any type of substance from outside the cell to the inside of the cell. 
• very large substances from outside the cell to the inside of the cell. 
• any type of substance from inside the cell to the outside.
• very large substances from inside the cell to the outside.

Multiple Choice

Active transport _______ and is the movement of a substance from _____ to _____ concentration

• requires energy, high to low
• requires no energy, low to high
•  requires no energy, high to low
•  requires energy, low to high

Multiple Choice

In this image, the cell is using which type of molecular transport?

• Osmosis
• Diffusion 
• Endocytosis
• Exocytosis