Chapter 2: Cell Processes Section 2.1: Cell Transport-pgs. (38-4

The cell membrane provides a barrier between the cell and its outside environment. It allows

some materials to pass through and prevents the passage of other materials, so it is called

...............

• selectively permeable

• partially permeable

• semi-permeable

.................... is the movement of molecules through the cell membrane without using

energy.

• Osmosis
• Passive transport

• Active transport
• Facilitated diffusion

............... protein is a protein in the cell membrane that carries a substance across the

membrane.

• Receptor protein
• Channel protein
• Transport protein

Glucose and amino acids are large molecules, but they can move in and out of a cell through

the cell membrane with the help of ................and also without spending energy,

provided they move from a side of high concentration to a side of low concentration.

• active transport
• endocytosis
• osmosis
• transport proteins

The process by which particles in a fluid randomly and spontaneously change relative

location is called [..................]. Diffusion is a type of [.....................] transport therefore it doesn’t

require energy.

• Diffusion, passive

• Concentration, endocytosis
• Permeability, facilitated diffusion
• Osmosis, active transport

The process that allows oxygen molecules to flow into gills is [.................].

• Filtration
• Diffusion
• Active transport
• Osmosis

A fish may die if the concentration of carbon dioxide in the surrounding water is [.............].

• high

• excessive
• adequate
• low

Water is important to a cell because all chemical reactions related to [................] things take place in water solutions.

• molecular
• physical
• biological
• Living

................... is the net diffusion of water through a semipermeable membrane from the side

where water in more [concentrated] (salt is more dilute) to the side where water is less

concentrated (salt is more concentrated).

• Diffusion
• Osmosis
• Permeability
• Filtration

Osmosis is the net diffusion of water through a semipermeable membrane from the side

where water in more [................] (salt is more dilute) to the side where water is less

concentrated (salt is more concentrated).

• concentrated

• less dilute
• more dilute