Homeostasis, Cell Struc. and Function

Question 1

What is the definition of homeostasis?

Answer 1

Homeostasis is the process on which 2 substances or reach about an equal state through trading things like molecules, electrons, or heat.

Question 2

Example of Homeostasis #1

Answer 2

An example is to have two container separated by a permeable membrane with saltwater on one side and normal water on the other. The salt would move to the other side to make an equal amount of salt on both sides.

Question 3

Example of Homeostasis #2

Answer 3

A drop of dye in water would at first be mostly seperated

Question 4

What is the magnification of the low power lens?

Answer 4

The magnification is 10x

Question 5

What is the function of the plasma membrane?

Answer 5

It allows good stuff to come in and bad stuff to stay out as well as holding all of the organelles inside of the cells while keeping them in relative order

Question 6

Are the heads of a plasma membrane polar or non-polar?

Answer 6

Polar

Question 7

How is DNA stored in the nucleus?

Answer 7

It is stored in chromosomes

Question 8

Why is cell diversity important?

Answer 8

It is Important as is allows different cells a greater chance to survive a natural disaster or extinction.

Question 9

What adjustment knob should you use with a high power objective lens?

Answer 9

The fine adjustment knob.

Question 10

Why does the plasma membrane have molecules in the middle of it.

Answer 10

To improve certain aspects of the liquid inside of it.

Question 11

Why do prokaryotic cells have no nucleus?

Answer 11

They have no need for it as they aren’t as complex as eukaryotic cells as well as it being easier to perform horizontal gene transfer.

Question 12

Why is the cytoplasm so important for the cell?

Answer 12

It creates a medium for the organelles to be in as well as being the medium that allows the transport of most materials within the cell.

Question 13

How does the cytoskeleton provide support of the cell and keep organelles anchored?

Answer 13

It keeps the organelles anchored by using protein fibers to connect them to the plasma membrane. It also provides support by making a web of the fibers around the entire plasma membrane.

Question 14

What are the components of the cytoskeleton and what do they do?

Answer 14

Microtubules for the skeleton of the cell and help transport materials. Microfilaments give the cell shape and allow the cell to move.

Question 15

Why is the nucleus so important?

Answer 15

It contains and gives out all of the instructions on how the cell will function.

Question 16

Why are ribosomes not membrane bound?

Answer 16

They produce proteins that are usually not used in places other than the cytoplasm.

Question 17

Why does the endoplasmic reticulum have so many folds?

Answer 17

So they can synthesize proteins and lipids faster due to the larger surface area.

Question 18

How does the golgi apparatus package proteins?

Answer 18

It takes the proteins and wraps them in a membrane so that they fuse into the plasma membrane and release the proteins into the open environment.

Question 19

Why do cell walls exist on plant cells?

Answer 19

Cell walls exist to protect the cells of a plant better than just a membrane normally would.

Question 20

What organelles do plant cells have that animal cells don”t?

Answer 20

Chloroplasts, Vacuoles, and Cell Walls.

Question 21

Why do vacuoles need to contain the molecules that they do?

Answer 21

They contain them so that they cant get in the way or contaminate any of the delicate processes in the cell.

Question 22

Does facilitated diffusion require an input of energy because the particles are moving from an area of high concentration to an area of lower concentration.

Answer 22

No