Multicellular Organisms and Their Systems
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Questions and Answers

What is the smallest building block of a multicellular organism?

  • Cell (correct)
  • Tissue
  • Organ
  • System

    • Which level of organization involves a group of tissues working together?

  • Cell
  • System
  • Organ (correct)
  • Organism

    • Which of the following describes a system in multicellular organisms?

  • A group of cells working together
  • A group of tissues specialized for a function
  • A group of cells forming an organism
  • A group of organs working together (correct)

    • What do you call all the bones in the body?

    <p>Skeleton</p> Signup and view all the answers

    In the context of increasing complexity, which of the following is correct?

    <p>Cell → Tissue → Organ → System</p> Signup and view all the answers

    What is the primary function of the leaf in a plant?

    <p>To absorb sunlight for photosynthesis</p> Signup and view all the answers

    Which type of joint allows for movement in all directions?

    <p>Ball-and-socket joints</p> Signup and view all the answers

    Which of the following accurately describes hinge joints?

    <p>Enable forwards/backwards movement only</p> Signup and view all the answers

    Which statement accurately describes fixed joints?

    <p>They allow no movement at all.</p> Signup and view all the answers

    What happens when you breathe out fully into a plastic tube submerged in water?

    <p>Water is pushed out of the bottle</p> Signup and view all the answers

    What is the role of the diaphragm in the breathing process?

    <p>It aids in expanding and contracting the lungs</p> Signup and view all the answers

    What role does cartilage play in human joints?

    <p>It protects bones from friction.</p> Signup and view all the answers

    What happens to the muscles between the ribs when we inhale?

    <p>They contract.</p> Signup and view all the answers

    Which bone is part of the knee joint?

    <p>Femur</p> Signup and view all the answers

    What is the primary function of ligaments in the human body?

    <p>To hold two bones together.</p> Signup and view all the answers

    What does a plastic jug full of water demonstrate when air is pushed from the lungs?

    <p>The volume of air in the lungs is reduced</p> Signup and view all the answers

    What component of a plant holds it upright during growth?

    <p>Stem</p> Signup and view all the answers

    What is the composition of air in the lungs primarily used for?

    <p>Facilitating gas exchange.</p> Signup and view all the answers

    What are muscles classified as?

    <p>A type of tissue that causes movement</p> Signup and view all the answers

    Where do plants primarily obtain minerals necessary for their growth?

    <p>From the soil through their roots</p> Signup and view all the answers

    What happens to the diaphragm when you inhale?

    <p>It contracts and flattens.</p> Signup and view all the answers

    Which muscle type is responsible for contracting the biceps?

    <p>Skeletal muscle</p> Signup and view all the answers

    What occurs to the volume of the chest during inhalation?

    <p>It increases.</p> Signup and view all the answers

    Which gas is primarily inhaled during the breathing process?

    <p>Oxygen, O2</p> Signup and view all the answers

    What happens to the pressure inside the chest cavity as the diaphragm contracts during inhalation?

    <p>It decreases.</p> Signup and view all the answers

    Which of the following muscles relaxes when the biceps contracts?

    <p>Triceps</p> Signup and view all the answers

    What percentage of carbon dioxide is typically found in inhaled air?

    <p>0.04%</p> Signup and view all the answers

    What connects muscles to bones?

    <p>Tendons</p> Signup and view all the answers

    What is the primary function of the lungs in the respiratory system?

    <p>To remove carbon dioxide and take in oxygen</p> Signup and view all the answers

    Which organ is responsible for pumping blood throughout the body?

    <p>Heart</p> Signup and view all the answers

    What function does the liver serve regarding toxins?

    <p>It filters toxins from the blood</p> Signup and view all the answers

    What function do the kidneys perform?

    <p>They filter blood and remove waste</p> Signup and view all the answers

    Which of the following is NOT a function of the skeleton?

    <p>Produce toxins</p> Signup and view all the answers

    What is the role of the stomach in the digestive system?

    <p>To digest food</p> Signup and view all the answers

    Which of the following bones is part of the ribcage?

    <p>Sternum</p> Signup and view all the answers

    What is a key function of the skeletal system?

    <p>To support the body's structure</p> Signup and view all the answers

    What is the composition of exhaled air?

    <p>0.04% carbon dioxide, 16% oxygen, 79% nitrogen</p> Signup and view all the answers

    How do antagonistic muscles function?

    <p>When one contracts, the other relaxes</p> Signup and view all the answers

    What occurs to the pressure inside the chest during exhalation?

    <p>Pressure increases due to decreasing volume</p> Signup and view all the answers

    What role do muscles play in movement?

    <p>They contract to pull bones and create movement</p> Signup and view all the answers

    Which gas is primarily exhaled in the smallest percentage when breathing?

    <p>Carbon dioxide</p> Signup and view all the answers

    What is the primary action of the muscles between the ribs during inhalation?

    <p>They contract, pulling the ribs up and out</p> Signup and view all the answers

    Which of the following is not a component of air composition when breathing in?

    <p>Helium</p> Signup and view all the answers

    Study Notes

    Multicellular Organisms

    • Multicellular organisms are made of many cells, with five levels of organization: cells, tissues, organs, organ systems, and organisms.

    Plant and Animal Organs

    • Examples of plant organs include roots, stems, and leaves.
    • Examples of animal organs include the brain, heart, liver, intestines, lungs, stomach, kidneys, and bladder.
    • Each organ has a specific function.

    Respiratory System

    • The respiratory system is involved in breathing.
    • This system includes processes for taking in oxygen for respiration and breathing out carbon dioxide.

    Skeleton

    • The skeleton is comprised of bones, with four primary functions: providing support, protecting organs, enabling movement, and producing blood cells in the bone marrow.
    • Bones are connected by joints.
    • The three types of joints are hinge joints (e.g., knees), ball-and-socket joints (e.g., shoulders), and fixed joints (e.g., skull).
    • Cartilage protects the bones at the joints, and ligaments hold the bones together.

    Muscles

    • Muscles are tissues composed of muscle cells that work together for movement.
    • Muscle types include cardiac (heart), smooth, and skeletal muscles.
    • Skeletal muscles are connected to bones by tendons, and these muscles cause movement by contracting.
    • Antagonistic muscles work together; when one contracts, the other relaxes.
      • Example: biceps and triceps.

    Breathing Mechanism

    • When inhaling:
      • Ribs move up and out
      • Diaphragm contracts and flattens
      • Chest volume increases
      • Chest pressure decreases
      • Air rushes into the lungs
    • When exhaling:
      • Ribs move down and in
      • Diaphragm relaxes and moves up
      • Chest volume decreases
      • Chest pressure increases
      • Air is pushed out

    Measuring Lung Volume

    • Lung volume can be measured by displacing water in a bottle when air is breathed out.

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    Related Documents

    B1 Chapter 2: Structure and Function of Body Systems PDF

    Description

    Explore the fascinating world of multicellular organisms through this quiz, which covers various levels of organization, plant and animal organs, the respiratory system, and the skeletal system. Test your knowledge on the structure and function of different organs and systems.

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