Cells and tissues

 Q: What is the basic structural and functional unit of all living organisms?

A: The cell is the fundamental unit of structure and function in living organisms.


Q: How are prokaryotic and eukaryotic cells different?

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


Q: What is the function of the cell membrane?

A: The cell membrane regulates the passage of substances in and out of the cell, maintaining its internal environment.


Q: How do plant cells differ from animal cells?

A: Plant cells have a rigid cell wall, chloroplasts for photosynthesis, and a large central vacuole, whereas animal cells lack these structures.


Q: What is the role of mitochondria in a cell?

A: Mitochondria are the powerhouse of the cell, producing ATP through cellular respiration.


Q: Define tissue in biology.

A: Tissue is a group of similar cells working together to perform a specific function in the body.


Q: What are the four main types of tissues in the human body?

A: The four main types of tissues are epithelial, connective, muscle, and nervous tissues.


Q: Explain the function of nervous tissue.

A: Nervous tissue transmits electrical impulses and coordinates communication between different parts of the body.


Q: How does muscle tissue contribute to movement?

A: Muscle tissue contracts and generates force, enabling movement of body parts.


Q: What is the function of connective tissue?

A: Connective tissue provides support, binds structures together, and protects organs in the body.

Comments

Post a Comment

Popular posts from this blog

What is work ?

 In physics, work is defined as the product of force and displacement in the direction of the force. Mathematically, it's represented as: W=Fd Where: - \( W \) = Work done - \( F \) = Force applied - \( d \) = Displacement - \( \theta \) = Angle between the force vector and the displacement vector
Read more

Parallel capacitor

 **Q: What is a parallel capacitor configuration?** **A:** A parallel capacitor configuration is when two or more capacitors are connected side by side, sharing the same voltage across their terminals. **Q: How is the total capacitance affected when capacitors are connected in parallel?** **A:** When capacitors are connected in parallel, the total capacitance is the sum of the individual capacitances. Mathematically, \(C_{\text{total}} = C_1 + C_2 + \ldots\). **Q: What advantage does connecting capacitors in parallel offer?** **A:** Connecting capacitors in parallel increases the overall capacitance in the circuit. This is useful when a higher capacitance value is needed, providing more charge storage capacity. **Q: How does the voltage distribution work in parallel capacitors?** **A:** In a parallel capacitor configuration, each capacitor experiences the same voltage as the voltage across the entire parallel combination. This is because the voltage across elements in parallel is c...
Read more

Endocytosis and exocytosis

 Endocytosis and exocytosis Q: What is endocytosis? A: Endocytosis is a cellular process where the cell engulfs external material by wrapping its cell membrane around it, forming a vesicle. Q: Differentiate between phagocytosis and pinocytosis in endocytosis. A: Phagocytosis involves the engulfing of solid particles, while pinocytosis involves the engulfing of liquid or small particles into vesicles. Q: What is the role of receptor-mediated endocytosis? A: Receptor-mediated endocytosis is a highly specific form of endocytosis where substances bind to receptors on the cell membrane, triggering their uptake into the cell. Q: How does exocytosis differ from endocytosis? A: Exocytosis involves the expulsion of material from the cell by fusing vesicles with the cell membrane, while endocytosis is the uptake of material by the cell through vesicle formation. Q: Provide an example of a biological process involving endocytosis. A: The uptake of cholesterol by cells through receptor-mediate...
Read more