Cell Transport Notes

Multiple Choice

Which of the following is an example of a stimulus that could disrupt homeostasis in the human body?

• A sudden drop in external temperature

• Stable blood sugar levels

• Constant internal pH

• Consistent body temperature

Multiple Choice

Why is maintaining homeostasis important for living organisms?

• Homeostasis allows organisms to maintain stable internal conditions.

• Homeostasis is irrelevant to an organism's growth.
• Homeostasis leads to increased energy consumption.
• Homeostasis is only important for plants.

Multiple Choice

Which of the following best describes the main function of feedback mechanisms in organisms?

• To help maintain homeostasis by responding to stimuli

• To help maintain homeostasis by increasing the rate of cell division

• To help maintain homeostasis by producing energy for cellular processes

• To help maintain homeostasis by transporting materials across the cell membrane

Multiple Select

Which of the following are examples of negative feedback mechanisms?

• Human child birth

• Fruit ripening

• Thermoregulation

• Blood sugar regulation

Multiple Select

Which of the following are examples of positive feedback mechanisms?

• fruit ripening

• shivering

• blood clotting

• Childbirth

Multiple Choice

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

• Small nonpolar molecules

• Large polar molecules

• Ions

• Proteins

Multiple Choice

What is the difference between passive and active transport in terms of energy requirement.

• Passive transport requires some energy, while active transport requires none.
• Both passive and active transport require energy.
• Passive transport is faster than active transport, which requires energy.
• Passive transport requires no energy, while active transport requires energy.

Multiple Select

What is the difference between passive and active transport in terms of the direction of movement relative to the concentration gradient.

• Active transport moves with the concentration gradient.

• Passive transport moves against the concentration gradient.

• Active transport moves against the concentration gradient.

• Passive transport requires energy, while active transport does not.
• Passive transport moves with the concentration gradient.

Multiple Choice

Which of the following best describes the role of a solvent in a solution?

• It gets dissolved in another substance.

• It does the dissolving in a solution.

• It is always a solid.

• It increases the concentration gradient.

Multiple Choice

Which of the following molecules would most likely require a transport protein to cross the cell membrane?

• Oxygen (O2)

• Carbon dioxide (CO2)

• Glucose

• Nitrogen (N2)

Open Ended

Explain how molecules move during simple diffusion and facilitated diffusion. What is similar and what is different about these two processes?

Match

Match the type of solution to its effect on a cell:

• Cell swells

• Cell shrivels

• Cell stays the same

Hypotonic

Hypertonic

Isotonic

• Hypotonic

• Hypertonic

• Isotonic

Multiple Choice

What type of solution is this cell in?

• Isotonic
• Hypertonic
• Hypotonic
• diffused

Multiple Choice

What type of solution is this cell in?

• Isotonic
• Hypertonic
• Hypotonic
• diffused

Multiple Choice

A cell has 80% water 20% solute, the surrounding solution has 60% water and 40% solute. What type of solution is this?

• Hypertonic

• Isotonic

• Hypotonic

• Equilibrium

Multiple Choice

Which cell is placed into a hypotonic environment? 

• A
• B
• C
• D

Multiple Choice

Which of the following statements about active transport using molecular pumps is correct?

• It requires energy to move molecules against the gradient

• It moves molecules with the gradient without energy

• It only transports water molecules

• It does not use protein channels

Multiple Choice

Which type of endocytosis involves the cell engulfing liquids?

• Phagocytosis

• Pinocytosis

• Exocytosis

• Osmosis

Multiple Choice

What is the term for a change in the environment that causes an organism to respond?

• Stimulus

• Response

• Homeostasis

• Equilibrium

Active

Passive

Osmosis

Water

Active

Molecular Pumps

Simple Diffusion

Exocytosis

large molecules and polar molecules

controls levels O₂ and CO₂ in the body

helps fight infections and diseases

gets rid of waste and regulates nerve impulses

Multiple Choice

Which type of transport is responsible for regulating blood sugar, and is it passive or active?

• Facilitated Diffusion, Passive

• Endocytosis, Active

• Facilitated Diffusion, Active

• Osmosis, Passive