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Cell Transport and Division. Rebecca Maloney, Ciara O’Shea, Madeleine Skipworth , Will Rips, Jonathan Wakeman Period 1. Passive Transport. Movement of material down the concentration gradient Does NOT require energy from the cell Diffusion

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cell transport and division

Cell Transport and Division

Rebecca Maloney, Ciara O’Shea, Madeleine Skipworth, Will Rips, Jonathan Wakeman

Period 1

passive transport
Passive Transport
  • Movement of material down the concentration gradient
  • Does NOT require energy from the cell
  • Diffusion
    • The movement of random particles down the concentration gradient to achieve equilibrium
  • Osmosis
    • The movement of water to create equilibrium
diffusion
Diffusion
  • Facilitated Diffusion
    • Passive transport by proteins (no energy required)
    • Channel Proteins
      • Form channels to allow specific molecules to flow through
    • Carrier Proteins
      • Change shape to allow a substance to pass through the membrane
diffusion1
Diffusion
  • Isotonic
    • The [solutes] and [water] inside and outside the cell are the same
  • Hypotonic
    • the [solutes] outside the cell lower than inside the cell. The [water] is higher outside the cell.
  • Hypertonic
    • The [solutes] outside the cell is higher than inside the cell. The [water] is lower outside the cell
active transport
Active Transport
  • Movement of materials though a membrane AGAINST a concentration gradient
    • Requires energy from cell
transport of large molecules
Transport of Large Molecules
  • Endocytosis- the process by which a cell surrounds and takes in material from its environment.(engulfea)
  • Exocytosis- the expulsion or secretion of materials from a cell.
slide7

Diffusion

  • Osmosis
cell cycle
Cell Cycle
  • The life cycle of a cell; events when the cell grows and divides
mitosis
Mitosis
  • Interphase
    • When the cell grows and replicates its DNA and centrioles
  • Prophase
    • Chromatin condenses into chromosomes. Centrioles separate, and a spindle forms. The nuclear envelope begins to break down
mitosis1
Mitosis
  • Metaphase
    • Chromosomes line up across the center of the cell. Each one is connected to a spindle fiver at its centromere
  • Anaphase
    • The sister chromatids separate into individual chromosomes and are moved apart
mitosis2
Mitosis
  • Telophase
    • The chromosomes gather at opposite ends of the cell, the chromosomes begin to loose their definite shape
  • Cytokinesis
    • The cytoplasm pinches in half, each daughter cell has an identical set of chromosomes
control of cell cycle
Control of Cell Cycle
  • Enzymes work to monitor a cells progress from phase to phase during the cell cycle
  • Some enzymes work to replicate DNA, some begin cell division, and others control the rest of the cell cycle
cancer
Cancer
  • A mistake in the cell cycle
  • Cancer is the result of uncontrolled cell division caused by genetic and environmental factors
  • Uncontrolled cell division occurs when
    • Cells fail to produce certain enzymes
    • Enzymes are over produced
    • Enzymes are produced at the wrong time
stages of cancer
Stages of Cancer
  • Cancer cells result from a change in one or more genes
  • Form masses of tissue called tumors that deprive normal cells of nutrients
  • Later cancer can enter the circulatory system and spread throughout the body
question 1
Question 1

Passive transport is the movement of materials _________ the concentration gradient.

a. Through

b. Against

c. Down

d. Up

question 2
Question 2

Osmosis if the movement of ________ to create equilibrium.

  • Water
  • Particles
  • Molecules
  • Cells
question 3
Question 3

What is the correct order of the cell cycle?

  • G1, G2, S, M
  • M, S, G1, G2
  • S, G1, M, G2
  • M, G1, S, G2
question 4
Question 4

Which phase is this?

  • Metaphase
  • Anaphase
  • Prophase
  • Telophase
question 5
Question 5

Which type of transport requires energy?

  • Active
  • Passive
question 6
Question 6

What is the first stage of mitosis?

  • Interphase
  • Prophase
  • Anaphase
  • Cytokinesis
question 7
Question 7

________ solution: the [solutes] outside the cell is lower than inside the cell.

  • Isotonic
  • Hypertonic
  • Hypotonic
question 8
Question 8

What does [x] mean?

question 9
Question 9

Cancer is the result of what?

question 10
Question 10

What is one example of uncontrolled cell division?

answer key
Answer Key

10. Cells fail to produce certain enzymes/ enzymes are overproduced/ enzymes are produced at the wrong time

  • C
  • A
  • D
  • A
  • A
  • B
  • C
  • Concentration of x
  • Uncontrolled cell division
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