1) Concept 2 Notes - Cell Transport (Teach)

Multiple Choice

It is hot outside. You start sweating. In this case, the hot weather is the...

• stimulus
• response
• cause and effect
• responder

Multiple Choice

It is hot outside. You start sweating. In this case, the sweating is the...

• stimulus
• response
• cause and effect
• responder

Open Ended

How do organisms use dynamic equilibrium to maintain homeostasis in response to changes in their environment?

Multiple Choice

Why is homeostasis important for living organisms?

• It helps organisms maintain stable internal conditions necessary for survival.

• It allows organisms to reproduce more quickly.

• It increases the size of organisms.

• It prevents organisms from responding to environmental changes.

Multiple Choice

Which of the following best describes the role of feedback mechanisms in maintaining homeostasis in organisms?

• They use the output of a system to signal a change in input, stabilizing or amplifying the system response.

• They only amplify the system response without stabilization.

• They prevent any change in input to the system.

• They regulate only the output of a system.

Multiple Select

Which of the following are examples of negative feedback mechanisms?

• Human body temperature regulation

• Fruit ripening

• Blood sugar regulation

• Human child birth

Multiple Choice

Which structure is indicated in the photograph and what is its primary function in maintaining cellular homeostasis?

• Cell membrane; controls movement of substances in and out of the cell

• Nucleus; stores genetic material

• Mitochondria; produces energy

• Cell wall; provides structural support

Open Ended

How does the flexibility of the cell membrane benefit unicellular organisms?

Multiple Choice

Which type of molecules can pass easily through the cell membrane?

• Small, nonpolar, hydrophobic, and/or neutral molecules

• Large, polar molecules

• Ions

• Proteins

Multiple Select

Select all that apply: Which of the following are examples of passive transport?

• Simple diffusion

• Facilitated diffusion

• Osmosis

• Exocytosis

Open Ended

Explain the difference between passive transport and active transport in terms of energy usage and direction of movement across the concentration gradient.

Open Ended

Describe what happens to molecules during simple diffusion across a membrane until equilibrium is reached.

Multiple Choice

Which process is illustrated by the movement of dye molecules in water as shown in the first image?

• Diffusion

• Osmosis

• Active transport

• Facilitated diffusion

Multiple Choice

Movement of materials from high to low concentration through a protein channel. 

• Passive Transport
• Active Transport

Multiple Choice

Which of the following statements about facilitated diffusion is correct?

• It requires energy input from the cell.

• It moves molecules from low to high concentration.

• It uses transport proteins to move molecules across the membrane.

• It only transports water molecules.

Multiple Choice

Which molecules are most likely to move through the pores in channel proteins during facilitated diffusion?

• Large polar molecules

• Small nonpolar molecules

• Ions and small polar molecules

• Proteins

Open Ended

Describe the role of carrier proteins in moving materials across the cell membrane.

Multiple Choice

Which of the following statements about osmosis is correct?

• Water moves from low to high concentration across a membrane.

• Water moves from high to low concentration across a membrane.

• Solute moves from high to low concentration across a membrane.

• Solute moves from low to high concentration across a membrane.

Multiple Choice

What happens to a cell in an isotonic solution?

• It swells

• It shrivels

• It stays the same

• It bursts

Open Ended

Explain how osmosis affects red blood cells when placed in hypertonic, hypotonic, and isotonic solutions.

Multiple Choice

Which type of solution causes a red blood cell to swell?

• Isotonic

• Hypotonic

• Hypertonic

• None of the above

Multiple Choice

Engulfing a large substance from the inside of the cell to move it outside of the cell. 
Uses energy. 

• exocytosis
• endocytosis
• photosynthesis
• diffusion

Multiple Choice

• Passive Transport
• Active Transport

Multiple Choice

This picture represents what type of cell transport?

• endocytosis
• exocytosis
• osmosis
• passive transport

Open Ended

How does homeostasis help organisms maintain stability in changing environments?