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Questions and Answers
What type of matter is mentioned in the text?
What type of matter is mentioned in the text?
- Liquid
- Solid
- Gas (correct)
- Plasma
Which organelle is NOT part of the endomembrane system as per the text?
Which organelle is NOT part of the endomembrane system as per the text?
- Golgi apparatus
- Mitochondria (correct)
- Endoplasmic reticulum
- Lysosome
What are the three main types of fibers in the cytoskeleton based on the text?
What are the three main types of fibers in the cytoskeleton based on the text?
- Thick fibers, Thin fibers, Middle fibers
- Macrofibers, Mini-fibers, Nano-fibers
- Microtubes, Active fibers, Intermediate fibers (correct)
- Rod-like fibers, Circular fibers, Star-shaped fibers
What is the primary function of microtubules in the cytoskeleton?
What is the primary function of microtubules in the cytoskeleton?
Where are the endoplasmic reticulum and Golgi apparatus located according to the text?
Where are the endoplasmic reticulum and Golgi apparatus located according to the text?
Which system is responsible for excreting waste products in the form of gases?
Which system is responsible for excreting waste products in the form of gases?
What is the purpose of using hydrogen peroxide?
What is the purpose of using hydrogen peroxide?
What happens when hydrogen peroxide is applied to a cut or wound?
What happens when hydrogen peroxide is applied to a cut or wound?
Why does the skin turn white when hydrogen peroxide is applied to it?
Why does the skin turn white when hydrogen peroxide is applied to it?
Why should you not drink hydrogen peroxide?
Why should you not drink hydrogen peroxide?
Which cellular organelle breaks down hydrogen peroxide into non-harmful chemicals?
Which cellular organelle breaks down hydrogen peroxide into non-harmful chemicals?
Why does hydrogen peroxide cause bubbles when applied to a wound?
Why does hydrogen peroxide cause bubbles when applied to a wound?
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Study Notes
Hydrogen Peroxide and Cellular Processes
- Hydrogen peroxide (H2O2) is a compound made up of hydrogen and oxygen.
- When hydrogen peroxide breaks down, it releases oxygen gas, which can form bubbles.
- Hydrogen peroxide is used as an antiseptic to kill bacteria, but it can also kill living cells.
Cellular Excretion
- Lysosomes break down harmful substances, including hydrogen peroxide, into non-harmful chemicals.
- Waste products can be excreted through the excretory system, which includes the urinary and digestive systems.
- Nitrogen-based waste is dissolved and excreted through the urinary system, while toxic substances are eliminated through the digestive system as fecal matter.
- Gases can also be excreted through the respiratory system.
Cytoskeleton
- The cytoskeleton is a network of fibers within the cytoplasm, made up of different proteins.
- There are three main types of cytoskeleton fibers: microtubules (thickest), intermediate fibers, and microfilaments (thinnest).
- The cytoskeleton provides structure and movement to the cell, and helps organize and maintain the position of organelles.
Organelle Movement
- Organelles like the endoplasmic reticulum and Golgi apparatus have specific locations in the cell.
- Mitochondria are not part of the endomembrane system and can move around in the cell.
- Cytoskeleton fibers help facilitate movement and organization of organelles.
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