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Biology AS > Tissues > Flashcards

Tissues Flashcards

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1
Q

What are tissues?

A

Tissues can be defined as collections of similar cells that perform specific functions

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2
Q

What are the 4 categories of tissue?

A
  • epithelial tissue
  • connective tissue
  • muscle tissue
  • nervous tissue
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3
Q

What is the function of the epithelial tissue?

A

Cover the exterior surfaces of the body, line internal cavities and passageways, and form certain glands

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4
Q

What is the function of the connective tissue?

A

Binds the cells and organs of the body together

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5
Q

What is the function of the muscle tissue?

A

Contracts forcefully when excited, providing movement

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6
Q

What is the function of the nervous tissue?

A

Also excitable, allowing for the generation and propagation of electrochemical signals in the form of nerve impulses that communicate between different regions of the body

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7
Q

What are the 3 types of epithelial cells?

A
  • squamous
  • cuboidal
  • columnar
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8
Q

What are the properties for squamous?

A

Thin and flat cells

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9
Q

What are the properties for cuboidal?

A

Short cylindrical cells, which appear hexagonal in cross-section

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10
Q

What are the properties for columnar?

A

Long or column-like cylindrical cells, which have nucleus present at the base

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11
Q

Describe simple epithelium

A

It is composed of one layer of a cell and mostly has a secretory or an absorptive function

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12
Q

Describe compound epithelium

A

It is made up of two or more than two layers of cells and mostly has a protective function

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13
Q

Describe the glandular epithelium

A

Is made up of cuboidal or columnar cells. They are specialised for secretion

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14
Q

What does unicellular mean?

A

Isolated glandular cells, e.g. goblet cells

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15
Q

What does multicellular mean?

A

A cluster of cells, e.g. salivary glands

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16
Q

What are the 3 types of muscle tissue?

A
  • skeletal muscle tissue
  • smooth muscle tissue
  • cardiac muscle tissue
17
Q

What is skeletal muscle tissue?

A

Muscle fibres are cylindrical, multinucleated, striated and under voluntary control

18
Q

What is smooth muscle tissue?

A

Cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntary muscles

19
Q

What is cardiac muscle tissue?

A

Has branching fibres, one nucleus per cell, striations and intercalated disks. It’s contraction is not under voluntary control

Biology AS (36 decks)

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