Cell Biology Basics
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Questions and Answers

Which of the following are types of muscle tissues? Select all that apply.

  • Cardiac muscle (correct)
  • Skeletal muscle (correct)
  • Smooth muscle (correct)
  • Epithelial muscle

The main functions of the nervous system include only controlling voluntary actions.

False (B)

What is cancer?

Cancer is a disease characterized by the uncontrolled growth and spread of abnormal cells in the body.

The connective tissue that connects muscles to bones is called a ______.

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

Match the following organs with their respective body systems:

<p>Heart = Circulatory System Stomach = Digestive System Brain = Nervous System Lungs = Respiratory System</p> Signup and view all the answers

Which of the following is NOT one of the three postulates of the Cell Theory?

<p>All cells contain genetic material. (C)</p> Signup and view all the answers

Eukaryotic cells do not have a defined nucleus.

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

What is the main function of mitochondria in a cell?

<p>Energy production through respiration.</p> Signup and view all the answers

In plant cells, the organelle responsible for photosynthesis is the __________.

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

Match the following organs of the digestive system with their functions:

<p>Mouth = Begins mechanical digestion and moistens food Stomach = Breaks down food with acids and enzymes Small intestine = Nutrient absorption Large intestine = Water absorption and waste compaction</p> Signup and view all the answers

Which type of tissue is responsible for contraction and movement in animals?

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

Cytokinesis is the process of DNA replication in a cell.

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

What are the three main reasons why cells must divide?

<p>Growth, repair, and reproduction.</p> Signup and view all the answers

Flashcards

Cell Theory Postulates

All living things are composed of cells, cells are the basic unit of structure and function in living things, and all cells come from pre-existing cells.

Prokaryotic vs. Eukaryotic Cells

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have both.

Animal vs. Plant Cells

Animal cells lack a cell wall and chloroplasts, whereas plant cells have both.

Cell Division Reasons

Cells divide for growth, repair, and reproduction.

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Digestive System Organs

The digestive system is a collection of organs that breaks down food into nutrients.

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Mechanical vs. Chemical Digestion

Mechanical digestion physically breaks down food, while chemical digestion uses enzymes to break down food molecules.

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Blood Vessels

Arteries carry blood away from the heart, veins carry blood to the heart, and capillaries facilitate the exchange of nutrients and waste.

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Blood Cells

Red blood cells carry oxygen, white blood cells fight infection, and platelets help with clotting.

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Musculoskeletal system function

Supports the body, allows movement, protects organs, produces blood cells, and stores minerals.

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Skeletal muscle function

Responsible for voluntary movement of the body.

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Cancer definition

Uncontrolled cell growth and division.

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Nervous system main function

Receiving sensory input and responding with motor output.

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Benign tumor characteristics

Noncancerous; does not spread to other tissues or organs.

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Study Notes

Cell Theory Postulates

  • All living organisms are composed of cells.
  • Cells are the basic units of structure and function in living organisms.
  • Cells arise from pre-existing cells.

Prokaryotic vs. Eukaryotic Cells

  • Prokaryotic cells lack a nucleus and membrane-bound organelles.
  • Eukaryotic cells have a nucleus and membrane-bound organelles.

Animal vs. Plant Cells

  • Plant cells have cell walls, chloroplasts, and a large central vacuole.
  • Animal cells lack cell walls, chloroplasts, and a large central vacuole.

Cell Organelles and Functions (table)

Organelle Function Animal Cell? Plant Cell?
Cell Wall Provides structural support No Yes
Cell Membrane Regulates what enters and leaves the cell Yes Yes
Mitochondria Site of cellular respiration Yes Yes
Ribosomes Site of protein synthesis Yes Yes
Chloroplast Site of photosynthesis No Yes
Nucleus Contains DNA Yes Yes
Nucleolus Found within the nucleus; involved in ribosome production Yes Yes
Centrioles Involved in cell division Yes No
Endoplasmic Reticulum Involved in protein and lipid synthesis Yes Yes
Golgi Bodies Processes and packages proteins and lipids Yes Yes
Vacuole Stores water and other substances Yes Yes (large central vacuole in plants)
Lysosome Contains enzymes that break down waste Yes Yes

Reasons for Cell Division

  • Growth
  • Repair
  • Reproduction

Stages of the Cell Cycle

  • Stages and description depend on the specific context of the prompt (mitosis, cytokinesis). Note diagrams are also provided for visual aid

Cytokinesis Differences

  • Animal cells: Cytoplasm divides by a cleavage furrow.
  • Plant cells: Cytoplasm divides by a cell plate.

Hierarchy of Life

  • Cells → Tissues → Organs → Organ Systems → Organisms

Animal Tissues

  • Epithelial tissue: Covers and lines body surfaces.
  • Connective tissue: Supports and connects body parts.
  • Muscle tissue: Enables movement.
  • Nervous tissue: Transmits nerve impulses.

Digestive System Organs and Functions (table)

Organ Description of Function
Mouth Mechanical digestion, beginning of chemical digestion
Salivary Glands Produce saliva, containing enzymes
Esophagus Transports food from mouth to stomach
Stomach Mechanical and chemical digestion of food
Small Intestine Absorption of nutrients
Large Intestine Absorption of water, elimination of waste
Rectum and Anus Elimination of feces
Liver Produces bile, filtering blood
Gall Bladder Stores bile
Pancreas Produces enzymes for digestion, hormones for regulating blood sugar

Blood Vessels

Blood Vessel Type Structure Function
Arteries Thick, elastic walls Carry oxygenated blood away from the heart
Veins Thin walls, valves Carry deoxygenated blood back to the heart
Capillaries Thin walls, single layer of cells Exchange of substances between blood and tissues

Blood Cell Types

Blood Cell Type Structure Function
Red Blood Cells Biconcave discs, no nucleus Carry oxygen
White Blood Cells Various shapes, nuclei Fight infection
Platelets Cell fragments Involved in blood clotting

Respiratory System Parts and Functions (table)

Organ/Structure Description of Function
Nose/Mouth Intake of air
Pharynx Passageway for air and food
Larynx Voice box; contains vocal cords
Trachea Windpipe, passageway for air
Bronchi Branch into smaller tubes
Bronchioles Smaller tubes leading to alveoli
Alveoli Tiny air sacs where gas exchange occurs
Diaphragm Muscle that aids in breathing

Musculoskeletal System Role

  • Provides support, protection, and movement.

Muscle Tissue Types & Functions

Muscle Tissue Type Description of Function
Skeletal Muscle Voluntary movement
Cardiac Muscle Involuntary heart contractions
Smooth Muscle Involuntary movement of internal organs

Connective Tissues and Functions

Connective Tissue Type Description of Function
Bone Support and protection
Cartilage Cushioning and support
Tendons Connect muscles to bones
Ligaments Connect bones to bones

Nervous System Functions and Divisions

  • Functions: Control bodily functions, sensory input, communication throughout the body.
  • Two divisions: Central Nervous System (brain and spinal cord); Peripheral Nervous System (nerves branching out).

Cancer Terminology (general)

  • Benign tumor: Non-cancerous growth

  • Malignant tumor: Cancerous growth

  • Metastasis: Spread of cancer cells

    (additional details on cancer detection and treatment methods are required under the request specifications).

Human Human Organs and Body Systems Table (partial)

Organ Body System
Spinal cord Nervous System
Heart Circulatory System
Bladder Urinary System
Pancreas Endocrine / Digestive System
Brain Nervous System
Stomach Digestive System
Kidneys Urinary System
Esophagus Digestive System
Liver Digestive System
Trachea Respiratory System
Intestines Digestive System
Lungs Respiratory System

(Other organs and body systems are omitted as further detail would be required. The structure of the table in the OCR is partial; complete data not provided).

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Description

Test your knowledge on the fundamentals of cell theory, compare prokaryotic and eukaryotic cells, and distinguish between animal and plant cells. This quiz covers the essential structures and functions of cell organelles, providing a comprehensive overview of cellular biology.

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