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SNC 2P Biology Review. Diffusion. Fill in the missing words: Diffusion is the movement of molecules from an area of ___________ concentration to an area of __________ concentration. Osmosis. Osmosis is the movement of ____________ molecules across a ______________. Osmosis.

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  • Fill in the missing words:

  • Diffusion is the movement of molecules from an area of ___________ concentration to an area of __________ concentration


  • Osmosis is the movement of ____________ molecules across a ______________


  • In which direction will water move (into the cell or out of the cell) in the example below?


  • Why do cells need to remain small?

  • State three reasons why cells need to divide

Cell division
Cell division

  • State the stages of the cell cycle

  • Circle the two stages that are the division stage

  • Star the stage that is just about division of the genetic material


  • High, low

  • Water, semi-permeable membrane

  • Into the cell

  • Small cells are more efficient at moving materials into and out of the cell because diffusion happens at a constant rate

  • Repair/maintain, growth, reproduce

  • Interphase, mitosis*, cytokinesis


  • Match each figure with either:

    • Prophase, metaphase, anaphase or telophase


  • What is a mutation?

  • Which of these types of tumour is more dangerous?

    • Benign or malignant

  • Give two reasons why that type is more dangerous


  • A – telophase, B- prophase, C- anaphase, D-metaphase

  • A change in the genetic code (or DNA)

  • Malignant

  • They invade other cells and they spread to other parts of the body (metastasis)

Cell specialization
Cell Specialization

  • What type of cell do all cells start out as?

  • Why do cells in multicellular organisms (like humans) need different kinds of cells?

  • What happens to cell when it specializes?

  • What is the name of this process?

Types of cells
Types of cells

  • Identify each of the following types of cells:

Types of tissues
Types of tissues

  • Fill in the blanks:

    • Cells specialize and work together to form ____

    • Tissues work together in ______ to perform a common task

    • Organs work together in ____ ____ to perform a common task

  • State the 4 types of tissues


  • Stem cells

  • Because there are many kinds of jobs to perform

  • They change size and shape

  • Cell differentiation

  • A- muscle, B-nerve, C-skin, D-bone, E-blood

  • Tissues, organs, organ systems

  • Muscle, epithelial, connective, nervous

Identify the organ that
Identify the organ that:

  • Moves blood through the body

  • Exchanges gases

  • Cleans and filters the blood

  • Cleans the blood, stores substances such as glycogen, vitamins and minerals

  • Churns and digests food

  • Absorbs nutrients into the body

Match the organ system
Match the organ system

  • Transports blood, nutrients, gases and wastes

  • Takes in and breaks down food

  • Controls breathing

  • Removes liquid wastes from the body

  • Moves body parts and organs

  • Provides structural support

  • Gathers and interprets sensory information

  • Defends against disease

  • Includes skin, hair, nails and provides a protective barrier


  • Heart, lungs, kidneys, liver, stomach, small intestine

  • Circulatory system, digestive system, respiratory system, excretory system, muscular system, skeletal system, nervous system, immune system, integumentary system


  • Match the labels to the structures or fill in the blanks:

Work bank: alveoli, capillaries, bronchus, bronchioles, diaphragm, epiglottis, larynx, lung, nasal cavity, pharynx, poor, rich, trachea


  • Explain what happens in gas exchange

  • Why is blood ‘oxygen poor’ when it arrives at the lungs? Or why do we need oxygen?


  • A – capillaries

  • B – alveoli

  • C – poor

  • D – rich

  • E – nasal cavity

  • F – pharynx

  • G – epiglottis

  • H – larynx

  • I – trachea

  • J – bronchus

  • K – lung

  • L – bronchioles

  • M – diaphragm

  • Oxygen moves into the lungs/alveoli, diffuses into the capillaries then diffuses into body cells while carbon dioxide goes from body cells through the blood to the lungs to be exhaled

  • For cellular respiration- so body cells can make energy using glucose and oxygen


  • Identify structures A - E:

  • Use the numbers to explain what happens to blood as it flows through the heart/lungs/body


  • A- artery, B-vein, C-valve, D- capillaries, E- heart

  • 10 –oxygen poor blood arrives at the heart and enters at 11 (right atrium) then goes to 1 (right ventricle) and is pumped out through 2 to the lungs (3) where gas exchange occurs

  • Oxygen rich blood comes from 3 (lungs) to 4 (left atrium) then 5 (left ventricle) where it is pumped through 6 (the aorta) to the body


  • Identify the parts labeled below:


  • State the 4 processes of digestion

  • Explain the difference between physical and mechanical digestion

  • What happens during absorption?


  • A- mouth, B-esophagus, C-stomach, D-liver, E-pancreas, F- large intestine, G- small intestine, H – rectum

  • Ingestion, digestion, absorption, elimination

  • Physical – breaking food down into smaller pieces

    • Chewing, churning

  • Chemical digestion uses chemicals (enzymes) to break food down for absorption

    • Saliva, gastric (stomach) fluids

  • The diffusion of food from the small intestine into the blood to travel to each cell of the body

Cellular respiration
Cellular Respiration

  • Write the word equation for cellular respiration

    • glucose + oxygen  carbon dioxide + water + energy

  • Explain how glucose and oxygen enter the body and reach each cell

  • Explain how carbon dioxide waste is removed from the body


  • Oxygen enters through the respiratory system (lungs/alveoli) and diffuses into the circulatory system (capillaries) where it is carried to every cell (and diffuses into the cells)

  • Glucose is absorbed from the digestive system and enters the circulatory system (capillaries) where it is carried to every body cell (and diffuses into the cells)

  • Carbon dioxide is a waste that diffuses from body cells into the circulatory system (capillaries) and is carried to the alveoli where it diffuses into the respiratory system and is exhaled


  • Organelle:

    • Cell wall

    • Cell membrane

    • Cytoplasm

    • Nucleus

    • Mitochondrion

    • Chloroplast

    • Vacuole

    • Endoplasmic reticulum

    • Golgi apparatus

    • Vesicle

    • Ribosomes

  • Function

    • A - transportation network

    • B - structural support

    • C - control centre, where the DNA is

    • D -creates energy from food

    • E- stores food water or wastes

    • F- controls what enters/exits

    • G -packages material for shipment

    • H -supports organelles, where chemical reactions happen

    • I -manufactures proteins

    • J -creates food from sunlight, water and carbon dioxide

    • K -membrane bound structure that carries materials into/out of cell


  • Cell wall -B

  • Cell membrane - F

  • Cytoplasm - H

  • Nucleus - C

  • Mitochondrion - D

  • Chloroplast -J

  • Vacuole - E

  • Endoplasmic reticulum - A

  • Golgi apparatus - G

  • Vesicle - K

  • Ribosomes - I

Animal cell
Animal cell

  • Label the parts of the cell:

Plant cell
Plant cell

  • Label the parts of the cell:


  • Animal cell

  • A – ribosome

  • B – nucleus

  • C – endoplasmic reticulum

  • D – cytoplasm

  • E – vacuole

  • F – Golgi apparatus

  • G – cell membrane

  • H – vesicle

  • I – cytoskeleton

  • J – mitochondrion

  • Plant cell

  • A – cytoskeleton

  • B – chloroplast

  • C – vacuole

  • D – vesicle

  • E – nucleus

  • F – ribosome

  • G – endoplasmic reticulum

  • H – cell membrane

  • I – cell wall

  • J – cytoplasm

  • K – Golgi apparatus

  • L – mitochondrion