Cells, Tissues, Organs and Systems Flashcards

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1
Q

What is the level of organisation in an organism

A
Atom 
Molecule 
Macromolecule 
Organelle 
Cell 
Tissue
Organ 
Organ system 
Organism
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2
Q

In multi-cellular organisms; cells may grouped together to form…..

A

Tissues

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3
Q

Formed from the functional grouping of multiple tissues that interact to make organ systems

A

Organs

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4
Q

Organ systems collectively carry out the life functions of the

A

Complete Organism

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5
Q

What is the basic unit of life

A

Cells

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6
Q

Function of Cells

A

Carry out particular tasks
e.g RBC
Have distinct shapes and different types of chemical recepetors

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7
Q

Function of Tissues

A

Group of cells with similiar function and structure

e.g muscle tissue is made up of many allinged muscle cells

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8
Q

Function of Organs

A

Group of tissues grouped together to make a structure with a special function
e.g Stomach is an organ which has an epithelial lining, gland tissue, muscle layer, blood vessels and nerves.

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9
Q

Function of a system

A

Usually a group of organs whose function is closely related.
Digestive system – oesophagus, stomach, liver, pancreas, intestines.

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10
Q

What do all cells of an organism have in common

A

They share an identical genome (set of instructions)

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11
Q

What is differentation?

A

Newly formed cells become more specialised and distinct as they nature.

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12
Q

When does differentation occur

A

When a specific gene (instruction) is ‘switched on’

  • Activation of genes is the result of chemical signals.
  • Cells can change structure and shape.
  • Specialised cells carry out specific functions
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13
Q

What does epithelial tissue cover

A

Covers many surfaces and linings of body cavities

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14
Q

What does epithelial tissue line?

A

Internal cavities

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15
Q

Function of Epithelial tissue

A

Acts as a protective layer and as a barrier against infection by microbes or water loss.

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16
Q

Examples of Epithelial Tissue

A
Outer part of the skin
Linings of the digestive tract
Lungs
Blood vessels
Body cavity
Various ducts
17
Q

What does connective tissue involve (parts in our body)

A
Bone
Cartilage
Blood
Tendons
Ligaments
18
Q

Function of connective tissue

A

Supports, connects and separates tissue and organs.

19
Q

What does connective tissue consist of

A

Fibres (elastin and collagen), ground substances and cells.

20
Q

What is the intercellular matrix?

A

A large portion of connective tissue – a network of protein fibres. Can be liquid, semisolid or solid.

21
Q

Examples of intercellular matrix

A

Blood and lymph (they are non-fibrous forms of CT)

22
Q

What does connective tissue contain?

A
  • Collagenous fibres which are non-elastic and do not tear easily when pulled lengthwise.
  • Elastic fibres that can stretch and return to their original length, and reticular fibres which are thin and branched – forming a network.
23
Q

Muscle Tissue

A

Specialised to convert chemical energy (ATP) into mechanical energy for movement.

24
Q

Description of Smooth muscle

A

Walls of many internal cavities, e.g intestines

25
Q

Description of Striated muscle

A

Connected to bones to give voluntary motion.

26
Q

Description of Cardiac Muscle

A

Only found in the heart.

27
Q

What does nervous tissue consist of

A

Specialised cells called neurons (nerve cells) and glial cells.

28
Q

What are the different types of nuerons

A

Sensory neuron
Motor neuron
Interneuron

29
Q

Identify the different Epithelial tissue classifications

A

Look at Diagram in 11.0 PPT

30
Q

What is tissue transplantation

A

Moving a tissue from one body to another or from a donor site to another location on the patient’s own body.

31
Q

What is organ transplantation

A

Moving of an organ, or part of an organ, from one body to another.

32
Q

What is autograph

A

Transplanted tissue from the patient’s own body to another area of their body.

33
Q

What is allograft

A

Transplanted tissue or organs from the body of one person to the body of another person.

34
Q

What do immunosuppressive drugs do

A

Help stop the body from rejecting transplanted organs and tissues. They suppress the immune system.