Chapter 3

Question 0

List basic tenets of the cell doctrine

Answer 0

All living things are composed of cells and cell products.
A single cell is the smallest unit that exhibits all characteristics of life.
All cells come from pre-existing cells.

Question 1

Why is being small advantages to a cell

Answer 1

Obtained raw materials and get rid of waste

Question 2

Describe how phospholipids are oriented in the plasma membrane and why the orient naturally that way

Answer 2

There arrange so nonpolar tails me in the center of the membrane

Question 3

Define passive transport and name three methods

Answer 3

Passive transport’s transports a molecule without the cell needing to expand any energy.
Diffusion through the lipid Bilayer.
Diffusion through channel
Facilitated transport

Question 4

Comparing contrast endocytosis and exocytosis.

Answer 4

Endo moves cells going in.
Exo moves cells out.
Both move large molecules.

Question 5

Describe the activity of the sodium potassium pump and its importance to a cell

Answer 5

Energy derived from breaking down ATP to transfer a sodium out of a cell and potassium in.
helps get molecules uphill.

Question 6

Explain what happens to a cell and high salts or low salt.

Answer 6

In high salt water diffuses causing it to shrink.

In low salt water enters causing it to swell.

Question 7

Define vesicles in name two types of vesicles.

Answer 7

Vesicles are membrane bound spheres that encloses something within the cell.
Secretory vesicles.
Endocytotic vesicles.

Question 8

Describe what happens to the cells ability to produce ATP when oxygen is not available

Answer 8

It can be made for a while by anaerobic pathways.