Cell Transport

1. Molecules or ions moving from a higher concentration outside a cell to a lower concentration inside, and that don't require ATP to make the move is referred to as ?

• bulk transport

• passive transport

• active transport

• concentration gradient

2. Cell membranes are referred to as a "fluid mosaic", meaning there are many components making up the membrane and they can move around like a fluid. Which is NOT part of cell membranes?

• phopholipids

• proteins

• iron oxide

• carrier proteins

Why does active transport require energy?

• Materials are moved from low concentration to high concentration with the concentration gradient

• Materials are moved from low concentration to high concentration against the concentration gradient

• Materials are moved from high concentration to low concentration with the concentration gradient

• Materials are moved from high concentration to low concentration against the concentration gradient

3. Plasma membranes are made of how many parallel layers?

• one

• two

• three

• four

4. If a molecule is very small and non-polar (no positive and negative ends), it probably moves across the cell membrane passively using ?

• osmosis

• facilitated diffusion

• endocytosis

• simple diffusion

5. If a muscle cell in your leg has an internal (cytoplasm) salt concentration of 0.9%, and the fluid outside the cell is 3.5% salt, will water seek to move INTO, OUT of, or BOTH in and out of the muscle cells?

• into the muscle cells

• out of the muscle cells

• both into and out of the muscle cells

• neither, there's no water in muscle cells

Tags

NGSS.HS-LS1-3

If the leaves of pine trees on the road in an area of heavy salt use start to turn brown, a likely cause could be what?

• acid rain

• Covid 19 caused by Sars-Cov2

• Moose peeing on them

• deydration in the root cells caused by the salts in the soil preventing water uptake

Tags

NGSS.HS-LS2-6

7. You go to the hospital because you are dehydrated and your cells have shrunk due to water loss. The doctors give you an IV containing a balanced salt solution that mimics the salts in your blood. What will likely happen to the size of your red blood cells when exposed to the IV fluid?

• shrink

• swell

• stay same size

• become donut-shaped due to the Ringers

Tags

NGSS.HS-LS1-3

8. True or False: Active Transport is how molecules or ions are pumped from an area of lower concentration to one of higher concentration using energy from ATP. For example, it's how Na+ and K+ are pumped across membranes with protein carrier pumps.

• True

• False

If solutes are large and/or polar they can't cross a membrane using simple diffusion, but if they get assistance or help from protein channels or carrier proteins, they can cross. When they move from a higher to lower concentration using help, it's called what?

• facilitated diffusion

• osmosis

• active transport