Podcast
Questions and Answers
What type of microscope uses electrons to magnify images?
What type of microscope uses electrons to magnify images?
- Compound microscope
- Light microscope
- Optical microscope
- Electron microscope (correct)
Prokaryotic cells contain a nucleus.
Prokaryotic cells contain a nucleus.
False (B)
What is osmosis?
What is osmosis?
The movement of water molecules across a partially permeable membrane from high water concentration to low water concentration.
Muscle cells contain special proteins that ______ past each other to facilitate movement.
Muscle cells contain special proteins that ______ past each other to facilitate movement.
Match the following types of solutions with their definitions:
Match the following types of solutions with their definitions:
Which part of the plant cell aids in water and mineral absorption?
Which part of the plant cell aids in water and mineral absorption?
In animals, cells lose the ability to further specialize after differentiation.
In animals, cells lose the ability to further specialize after differentiation.
What is the main function of mitochondria in muscle cells?
What is the main function of mitochondria in muscle cells?
Active transport requires ______ to move substances against the concentration gradient.
Active transport requires ______ to move substances against the concentration gradient.
Which of the following describes Eukaryotic cells?
Which of the following describes Eukaryotic cells?
Flashcards
Light Microscope
Light Microscope
Use light and lenses to magnify images, allowing you to see individual cells and large subcellular structures.
Electron Microscope
Electron Microscope
Use electrons instead of light to magnify images, providing a much higher resolution and allowing you to see internal structures.
Eukaryotic Cells
Eukaryotic Cells
Larger cells that contain their genetic material within a nucleus. Can be single-celled or multicellular.
Prokaryotic Cells
Prokaryotic Cells
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Osmosis
Osmosis
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Hypertonic Solution
Hypertonic Solution
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Hypotonic Solution
Hypotonic Solution
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Isotonic Solution
Isotonic Solution
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Active Transport
Active Transport
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Surface Area to Volume Ratio
Surface Area to Volume Ratio
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Study Notes
Cell Structures and Functions
- Cells are the fundamental units of life
- Prokaryotic cells lack a nucleus and membrane-bound organelles
- Eukaryotic cells have a nucleus and membrane-bound organelles
Microscopy
- Light microscopes use light and lenses to magnify images
- Electron microscopes use electrons to produce higher resolution images
Cell Specialisation in Animals
- As cells develop, they become specialized with different functions
- Nerve cells transmit electrical impulses for rapid communication
- Muscle cells contract and relax to move bones
- Sperm cells deliver genetic material to the egg
Cell Specialisation in Plants
- Root hair cells absorb water and minerals from the soil
- Large surface area for efficient absorption
- Large vacuoles move water via osmosis
Osmosis
- Osmosis is the movement of water across a semi-permeable membrane from a region of high water concentration to a region of low water concentration
- Types of solutions:
- Hypotonic: more water outside the cell, cell swells
- Hypertonic: less water outside the cell, cell shrinks
- Isotonic: equal water inside and outside the cell, no change
Osmosis in Plants
- Osmosis supports plant stems and leaves
- Water uptake by cells maintains turgor pressure
Active Transport
- Active transport moves substances against a concentration gradient
- Requires energy from respiration
- Cells with high active transport needs have many mitochondria
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