Biology Chapter on Cell Movement and Specialization

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Questions and Answers

What is the primary function of capillaries?

  • To transport blood around the body
  • To allow nutrient exchange (correct)
  • To store urine
  • To control body activities

The spinal cord is responsible for passing information from the brain to the body and vice versa.

True (A)

What is the role of kidneys in the excretory system?

To clean the blood of waste products.

The _____ functions to regulate blood composition and excrete waste fluids.

<p>excretory system</p> Signup and view all the answers

Match the following body systems with their primary functions:

<p>Digestive = Breaks down food and eliminates wastes Respiratory = Exchanges oxygen and carbon dioxide Circulatory = Circulates blood and transports materials Nervous = Controls body activities and senses changes</p> Signup and view all the answers

What is diffusion primarily driven by?

<p>Kinetic energy of random motion (A)</p> Signup and view all the answers

A semi-permeable membrane allows all types of molecules to pass through without restriction.

<p>False (B)</p> Signup and view all the answers

What is osmosis?

<p>The diffusion of water across a semi-permeable membrane.</p> Signup and view all the answers

The two main types of vascular tissue in plants are the _______ and _______.

<p>xylem, phloem</p> Signup and view all the answers

Match the following substances with their mode of crossing the cell membrane:

<p>Oxygen = Crosses between phospholipids Sodium ions = Crosses through protein channels Water = Crosses between phospholipids Sugar = Crosses through protein channels</p> Signup and view all the answers

What happens to water molecules during osmosis?

<p>They move from an area of high solute concentration to low solute concentration. (B)</p> Signup and view all the answers

An impermeable membrane allows substances to pass through freely.

<p>False (B)</p> Signup and view all the answers

Define a permeable membrane.

<p>A membrane that allows everything to cross.</p> Signup and view all the answers

What is the primary function of xylem tissue in plants?

<p>Conduct water and dissolved minerals (C)</p> Signup and view all the answers

Phloem cells are involved in the transport of water in plants.

<p>False (B)</p> Signup and view all the answers

What process allows water to move from the roots to the leaves of a plant?

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

The __________ are crescent-shaped cells that regulate the opening and closing of stomata.

<p>guard cells</p> Signup and view all the answers

Match the following types of cells with their primary functions:

<p>Muscle cells = Move parts of the body Skin cells = Protect the body from UV rays Nerve cells = Carry nerve signals Red blood cells = Transport oxygen</p> Signup and view all the answers

Which of the following is NOT an advantage of being multicellular?

<p>Completely independent cells (B)</p> Signup and view all the answers

Red blood cells have a large surface area to efficiently pick up oxygen.

<p>True (A)</p> Signup and view all the answers

What do stomata do in the process of transpiration?

<p>Allow water to escape from the plant</p> Signup and view all the answers

What is the primary function of saliva in the mouth?

<p>Breaks down carbohydrates (D)</p> Signup and view all the answers

The esophagus is responsible for the absorption of nutrients.

<p>False (B)</p> Signup and view all the answers

What is the main role of the liver in digestion?

<p>Makes bile which breaks down fats.</p> Signup and view all the answers

The ______ is the chamber where feces are stored before exiting the body.

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

Match the following parts of the respiratory system with their functions:

<p>Larynx = Creates sounds from moving air Trachea = Passage for air to lungs Alveoli = Where gas exchange occurs Diaphragm = Muscle that aids in breathing</p> Signup and view all the answers

Which organ is responsible for pumping blood throughout the body?

<p>Heart (A)</p> Signup and view all the answers

Arteries carry oxygen-poor blood away from the heart.

<p>False (B)</p> Signup and view all the answers

What is the process through which the lungs perform gas exchange?

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

Which component of blood is responsible for carrying oxygen?

<p>Red Blood Cells (A)</p> Signup and view all the answers

High cholesterol does not contribute to circulatory disorders.

<p>False (B)</p> Signup and view all the answers

What are the main components of blood?

<p>Plasma, Red Blood Cells, White Blood Cells, Platelets</p> Signup and view all the answers

________ are essential for muscle growth and repair of tissues.

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

Match the following respiratory disorders with their characteristics:

<p>Bronchitis = Inflammation of the bronchial tubes Asthma = Airway constriction leading to breathing difficulty Emphysema = Damage to the air sacs in the lungs Lung Cancer = Malignancy in lung tissues</p> Signup and view all the answers

Which type of tissue is responsible for moving parts of the body?

<p>Muscle tissue (B)</p> Signup and view all the answers

Epithelial tissue serves to transport materials in the body.

<p>False (B)</p> Signup and view all the answers

Name one function of the contractile vacuole in cells.

<p>To store wastes and transport them outside of the cell.</p> Signup and view all the answers

The _____ system is responsible for gas exchange in the body.

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

Which organ is part of the circulatory system?

<p>Heart (A)</p> Signup and view all the answers

Plants have more complex systems than animals.

<p>False (B)</p> Signup and view all the answers

What is the primary role of xylem in plants?

<p>To transport water and minerals from the roots to the rest of the plant.</p> Signup and view all the answers

Pseudopods are used by amoeba to _____ their prey.

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

Which of the following tissues supports and connects different parts of the body?

<p>Connective tissue (C)</p> Signup and view all the answers

Flashcards

Diffusion

The movement of molecules from an area of high concentration to an area of low concentration due to random motion.

Semi-permeable membrane

A membrane that allows certain molecules to pass through while blocking others.

Osmosis

The movement of water across a semi-permeable membrane from an area of high water concentration to an area of low water concentration.

Cell Membrane

The outer boundary of a cell that controls what enters and exits.

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Vascular Tissue

A type of tissue found in plants that transports water and nutrients throughout the plant.

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Xylem

The part of the vascular tissue that transports water from roots to leaves.

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Phloem

The part of the vascular tissue that transports sugars from leaves to other parts of the plant.

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Permeable Membrane

A membrane that allows everything to cross.

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Xylem Tissue

A type of plant tissue that transports water and dissolved minerals upward from the roots to the leaves.

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Phloem Cells

A type of plant tissue that transports food (sugars) and other organic substances throughout the plant.

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Transpiration

The process of water evaporating from the leaves of plants, creating a tension that draws water up from the roots through the xylem.

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Stomata

Tiny pores on the underside of leaves that allow for gas exchange, including the release of water vapor during transpiration.

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Guard Cells

Specialized cells within the stomatal pores that control their opening and closing, regulating the release of water.

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Transpiration Stream

The upward flow of water within a plant, driven by transpiration.

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Cell Specialization

A process where cells within a multicellular organism specialize and develop specific structures and functions to carry out particular tasks.

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Advantages of Being Multicellular

The ability of multicellular organisms to perform complex tasks and adapt to diverse environments due to the specialized functions of their cells.

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What is plasma?

The liquid portion of blood that carries nutrients, waste products, and blood cells.

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What do red blood cells do?

Red blood cells are responsible for carrying oxygen throughout the body.

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What are white blood cells for?

White blood cells are responsible for fighting infections and helping with blood clotting.

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What do platelets do?

Platelets are cell fragments that help stop bleeding by forming clots.

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What are some common disorders of the circulatory system?

High blood pressure and heart attacks are common disorders of the circulatory system.

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What does the excretory system do?

The process of removing waste products from the body, maintaining the balance of fluids and electrolytes.

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What are capillaries?

Tiny blood vessels that allow the exchange of nutrients, oxygen, and waste products between blood and the body's cells.

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What is the brain's role in the nervous system?

The main control center of the nervous system, responsible for thinking, feeling, and coordinating bodily functions.

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What is the spinal cord's role in the nervous system?

The tube that connects the brain to the rest of the body, transmitting messages and instructions.

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What are nerve cells?

Specialized cells that transmit messages throughout the nervous system in the form of electrical impulses.

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Digestion

The process of breaking down food into smaller molecules that the body can absorb.

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Esophagus

A tube that connects the mouth to the stomach and helps move food down via rhythmic muscle contractions.

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Liver

A large organ that produces bile, a substance that helps break down fats in the small intestine.

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Gallbladder

A sac-like organ that stores and releases bile into the small intestine.

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Pancreas

An organ that produces enzymes to break down carbohydrates, fats, and proteins, aiding digestion.

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Small Intestine

The main site of nutrient absorption in the digestive system.

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Large Intestine

The final part of the digestive system responsible for absorbing water and forming solid waste.

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Contractile Vacuole

Tiny structures within a cell that store waste before it is transported out.

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Food Vacuole

A specialized compartment within a cell where large food particles are broken down.

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Pseudopods

Temporary extensions of the cytoplasm of an amoeba that help it move and capture prey.

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Tissue

A group of similar cells that work together to perform a specific function.

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Connective Tissue

Connects and supports different parts of the body. Examples include bone, blood, and loose sheets between organs.

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Epithelial Tissue

Protects the outside of the body, or covers internal structures such as intestines.

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Muscle Tissue

Allows for movement of parts of the body.

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Nervous Tissue

Carries signals between the brain and other parts of the body.

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Root System

The system responsible for obtaining water and nutrients from the soil and anchoring the plant.

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Shoot System

The system responsible for producing food through photosynthesis, carrying out reproduction, and supporting leaves and stems.

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Study Notes

Movement in Cells

  • Diffusion: Molecules move from high concentration to low concentration due to kinetic energy
  • Semi-permeable Membrane: Allows certain molecules to pass, rate depends on pressure, concentration, temperature and permeability of membrane
  • Osmosis: Water diffuses across a semi-permeable membrane from high to low concentration, always moving towards higher solute concentration.
  • Cell Membrane: A semi-permeable membrane controlling what goes in and out of the cell.
    • Some substances pass freely (oxygen, water, carbon dioxide) between phospholipids
    • Others are allowed through proteins (channels) (sugars, charged ions)
    • Some substances cannot pass at all

Cell Specialization and Organization

  • In multicellular organisms, different cells have specific jobs (specialized)
  • Muscle cells are shaped for movement
  • Skin cells protect from drying
  • Nerve cells transmit signals
  • Red blood cells carry oxygen

Tissues and Organs

  • Tissues: Groups of similar cells
    • Connective (bone, blood)
    • Epithelial (skin)
    • Muscle (movement)
    • Nervous (signals)
    • Plant tissues (epidermal, xylem, phloem)
  • Organs: Distinct structures that perform specific functions
    • Examples: heart, kidneys, lungs (in humans), roots, stems, leaves (in plants)

Plant Systems

  • Plants have fewer systems than animals:
    • Roots: anchor, absorb water/nutrients, store food
    • Shoot system: photosynthesis (sugar production), reproduction (reproduction by flowers, fruits, seeds sometimes)

Human Body Systems

  • Digestive System: Breaks down food, absorbs nutrients, expels waste
  • Respiratory System: Inhale oxygen, exhale carbon dioxide, gas exchange
  • Circulatory System: Transports food and oxygen throughout the body using heart, blood, blood vessels (arteries, veins, capillaries)
  • Nervous System: Coordinates and controls body actions, detects, processes, and responds to stimuli
  • Excretory System: Removes waste (urine) from the body

Body Systems and Health

  • Blood: Transports substances, oxygen, wastes, nutrients; made of plasma, red/white blood cells, platelets.
  • A Healthy Lifestyle: Promotes healthy function of body systems
  • Diseases: Some diseases affect the circulatory, respiratory, and digestive systems (e.g., high blood pressure, heart attacks, lung cancer, bronchitis).

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