Specialised cells Flashcards

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1
Q

What is the general process of cell specialisation?

A
  • The first group of cells in embryo are initially identical
  • Cell becomes specialised in structure to optimise function when matured
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2
Q

What is the general process of cell specialisation?

A
  • The first group of cells in embryo are initially identical
  • Cell becomes specialised in structure to optimise function when matured
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3
Q

Are all genes used in specialised cells?

A

No some genes are switched on other off depending on the cell

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4
Q

What varies in different specialised cells?

A
  • Shape
  • Number of organelles
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5
Q

What is the relationship between specialised cells and multicolour organisms?

A
  • Specialised cells have evolved to become more and more suited to one function
  • Organism functions more efficiently
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6
Q

What is a tissue?

A

A group of similar cells organised into a structural unit that serves a particular function

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7
Q

How are epithelial tissues specialised?

A
  • Consist of sheets of cells
  • Line surface of organs > have a protective or secretory function
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8
Q

Example of epithelial cells?

A
  • Epithelial cells which are thin and line the surface of organs where diffusion takes place > alveoli
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9
Q

What is an organ?

A

A combination of tissues that are coordinated to preform a variety of functions (predominately one function)

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10
Q

What is an example of an organ?

A
  • Stomach > muscle tissues to churn and mix stomach contents
  • Epithelium to protect stomach wall and produce secretions
  • Connective tissues to hold other tissues together
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11
Q

What is an organ system?

A
  • Organs working together a single unit to preform particular functions
  • May be grouped together for efficiency
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12
Q

What is an example of an organ system/

A
  • The respiratory system > used for breathing and gas exchange > made up of organs such as trachea, bronchi, and lung
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