Homeotasis Cell Struc. and Function

Question 1

What is the job of the cell?

Answer 1

It’s the structural and functional unit of all organisms.

Question 2

What are the three principles of cell theory?

Answer 2

• all living organisms are composed of one or more cells
• cells are the basic unit of structure and organization
• cells arise from previously existing cells by passing copies of genetic material

Question 3

What is the function of the plasma membrane?

Answer 3

It acts as a special boundary that controls what exits and enters the cell.

Question 4

What are two names for genetic material?

Answer 4

DNA and RNA

Question 5

What type of cell contains a nucleus and other organelles?

Answer 5

Eukaryotic cells

Question 6

What are organelles?

Answer 6

Specialized structures that perform specific cell functions. (Organs of the cell)

Question 7

What is the nucleus and what does it hold inside of it?

Answer 7

The nucleus is the central organelle of the entire cell, it contains the cell’s genetic material.

Question 8

Define a prokaryotic cell

Answer 8

A prokaryotic cell is a type of cell that was thought to be in prehistoric times, the cell does not have a nucleus and does not have any membrane bound organelles. It’s much simpler in design than eukaryotes.

Question 9

What is the endosymbiont theory?

Answer 9

A theory in which a symbiotic relationship is formed between to prokaryotes cells and they live inside the other, until eventually they become one cell.

Question 10

What is the process of maintaining balance in an organism’s internal environment?

Answer 10

Homeotasis

Question 11

Define Selective permeability

Answer 11

a process in which the plasma membrane allows certain substances to pass through when keeping others out.

Question 12

Define the Endosymbiont theory.

Answer 12

A symbiotic relationship is formed between two prokaryotic cells in which they live inside one another and eventually become one cell.

Question 13

What is selective permeability

Answer 13

A process in the plasma membrane that allows certain substances to pass through the cell while keeping bad susbtances out.

Question 13

What is selective permeability

Answer 13

A process in the plasma membrane that allows certain substances to pass through the cell while keeping bad susbtances out.

Question 14

What does the phospholipid bilayer do for the cell?

Answer 14

It’s arranged in such a way that allows the membrane to exist in water.

Question 15

Why do polar heads face their certain directions?

Answer 15

To keep both the external and internal environments seperate and not mixing.

Question 16

Name 3 proteins found in the cell and their jobs?

Answer 16

Receptors proteins- transmits signals to the inside of the cell
Support proteins- gives membrane structure and strenth
Transport proteins- form channels to move substances through the membrane.