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Biology > Topic 2 > Flashcards

Topic 2 Flashcards

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1
Q

What factors can affect health?

A
  • diet
  • exercise
  • genes
  • community (mental health)
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2
Q

What is health?

A

overall state of physical and mental well-being

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3
Q

What is cancer?

A

when cells begin to divide uncontrollably

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4
Q

What does cancer lead to?

A

lumps

  • benign tumours (slow and generally harmless)
  • malignant tumours (fast, aggressive, mobile)
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5
Q

What are risk factors of cancer?

A
  • smoking (lung)
  • diet (bowel)
  • amount of time in sun (skin)
  • unprotected sex (cervical)
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6
Q

What is the palisade mesophyll?

A

where photosynthesis takes place

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7
Q

What is the cuticle?

A

waxy layer

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8
Q

What is the upper epidermis?

A

covers plant

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9
Q

What is the spongy mesophyll?

A

space for gas exchange

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10
Q

What is the lower epidermis?

A

covers plant

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11
Q

What is the stomata?

A

transpiration

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12
Q

What does xylem do?

A

carries water up the plant from the roots to the leaves

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13
Q

What does phloem do?

A

ions and food down the plant from leaf where food can be made to roots where food can be stored

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14
Q

Factors that affect rate of transpiration

A
  • light
  • temperature
  • wind
  • humidity
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15
Q

Function of waxy cuticle?

A

reduce water loss by evaporation

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16
Q

Function of upper epidermis

A

transplant so light can pass through to the palisade layer

17
Q

Function of the palisade layer?

A

most chloroplast and is at top of leaf to get most light

18
Q

Function of xylem and phloem?

A

deliver water and nutrients to the leafy and take away glucose

19
Q

Function of stomata?

A

diffusion of carbon dioxide controlled by guard cells

20
Q

What is translocation?

A

phloem tubes transporting food made in the leaf to the rest of the plant

21
Q

what is transpiration?

A

loss of water through the plant

22
Q

what causes transpiration?

A

diffusion (more water inside plant than the air outside) and evaporation at leaves

Biology (12 decks)

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