Cell differentiation in multicellular organisms

Question 1

What is the organisation of multicellular organisms

Answer 1

ATOM
MOLECULES/COMPOUNDS
ORGANELLE
CELL
TISSUE
ORGAN
ORGAN SYSTEM
ORGANISM

a moves/c, o calls t, o3

Question 2

Define Cell

Answer 2

the basic units of structure and function in the human body

Question 3

Human cells are specialised in form and function, give two examples

Answer 3

nerve cells have long projections that help them carry electrical messages to other cells.

muscle cells have many mitochondria that provide the energy needed for movement

Question 4

Tissue define and types

Answer 4

Tissue is a group of connected cells that have a similar function.

There are four basic types of human tissue: epithelial, muscle, nervous, and
connective.

These four tissue types make up all the organs of the human body.

Question 5

Connective tissue

Answer 5

Connective tissue is made up of cells that form the body’s structure.
Examples include bone and cartilage.

Question 6

Epithelial tissue

Answer 6

made up of cells that line inner and outer body surfaces, such as the skin and the lining of the digestive tract.

Epithelial tissue protects
the body and its internal organs, secretes substances such as hormones, and absorbs substances such as nutrients

Question 7

Muscle tissue

Answer 7

made up of cells that have the unique ability to contract, or
become shorter. Muscles attached to bones enable the body to move

Question 8

Nervous tissue

Answer 8

made up of neurons, or nerve cells, that carry electrical messages.
Nervous tissue makes up the brain and the nerves that connect
the brain to all parts of the body.

Question 9

Organ define

Answer 9

structure that consists of two or more types of tissues that work
together to do the same job

Question 10

Organ system

Answer 10

group of organs that work together to carry out a complex
overall function. Each organ of the system does part of the larger job

Question 11

Cells continued concerning tissue fluid

Answer 11

Cells obtain nutrients from their surrounding tissue fluid (extracellular fluid). This fluid also carries away their waste products.

The composition of tissue fluid needs to be kept relatively constant

Cells require certain things to respire, synthesise molecules, produce waste,
carry out cell division, etc

Question 12

Tissue fluid

Answer 12

Glucose concentration
* Temperature
* Oxygen
* Water
* Carbon dioxide
* Waste products (urea)
* Mineral ions
* pH