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Science : BIO 1 > Cells and Control > Flashcards

Cells and Control Flashcards

1
Q

What are the products of mitosis

A

2 genetically IDENTICAL daughter cells.

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2
Q

What are the 3 stages of the cell cycle?

A
  • Growth and DNA replication
  • Mitosis
  • Cytokinesis
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3
Q

how does growth occur in animals

A

Cell division and differentiation

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4
Q

how does growth occur in plants

A

Cell division, differentiation and ELONGATION.

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5
Q

what is elongation

A

when plants absorb water into their vacuoles.

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6
Q

How is cancer formed

A

Cancer is caused by uncontrolled cell division. the product of this is a tumour.

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7
Q

what is the orders of the nervous system

A

change in stimulus
receptor
sensory neurone
relay neurone
motor neurone
effector

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8
Q

what is a chromosome

A

DNA molecule coiled around proteins

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9
Q

why is mitosis important in organisms

A

Asexual reproduction
growth
repair of cells
cell replacement

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10
Q

what is interphase

A

longest stage of cycle
involves cell growth and DNA replication

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11
Q

what happens in prophase

A

DNA condenses
Nuclear membrane disappears

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12
Q

what happens in metaphase

A

chromosomes line up along cell equator

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13
Q

what happens in anaphase

A

spindle fibres attach to each chromosome
chromatids seperated

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14
Q

what happens in telophase

A

nucleus of cell divides
new membrane form around each set of chromosomes

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15
Q

what does cytokinesis involve

A

division of cell membrane and cytoplasm
produces 2 genetically identical daughter cells

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16
Q

what is the function of an axon

A

carries impulses away from the cell body

17
Q

what is the function of dendrites and dendrons

A

carry impulses towards the cell body

18
Q

what is the role of the myelin sheath

A

surrounds the axon and increases the speed of impulses

19
Q

what does a sensory neurone do

A

carrys impulses from receptors to the CNS

20
Q

what does a motor neurone do

A

carries impulses from CNS to effectors

21
Q

what does a relay neurone do

A

carries impulses from sensory neurones to motor neurones
within the CNS

22
Q

what is a synapse

A

a small gap between neurones.
a nerve impulse is transmitted between synapses via neurotransmitters

23
Q

what is a reflex

A

automatic respond
involuntary
protective mechanism

Science : BIO 1 (5 decks)

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