You Are Standing in a Moving Bus, Facing Forward, and You

question 6

Multiple Choice

You are standing in a moving bus, facing forward, and you suddenly move forward as the bus comes to an immediate stop. What force caused you to move forward?

• A)force of gravity
• B)normal force due to your contact with the floor of the bus
• C)force due to static friction between you and the floor of the bus
• D)force due to kinetic friction between you and the floor of the bus
• E)no forces were responsible for your fall.

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Definitions:

Lipid-Soluble Molecules

Molecules capable of dissolving in lipids or fats, often capable of easily passing through cell membranes.

Lipid Bilayer

The fundamental structure of cell membranes, comprising two layers of lipids primarily phospholipids.

Membrane Channels

Protein structures that span the cell membrane, allowing the selective passage of ions and molecules in and out of the cell.

Hypertonic

Solution that causes cells to shrink.