Question

Яка будова жалких клітин? Яка їх функція​

Answer 1

Ответ:

Жалкі клітина має жалку капсулу, заповнену отруйною речовиною. Всередину капсули ввернута жалка нитка. На поверхні клітини знаходиться чутлива нитка, при її подразненні нитка викидається і вражає жертву.

Answer 2

Structure of Cells

The structure of cells can vary depending on the type of cell and its function. However, all cells have some common components. The basic structure of a typical animal cell can be divided into three main parts: the cell membrane, the cytoplasm, and the nucleus.

1. Cell Membrane: The cell membrane, also known as the plasma membrane, is a thin, flexible barrier that surrounds the cell. It separates the internal environment of the cell from the external environment. The cell membrane is composed of a phospholipid bilayer with embedded proteins that regulate the movement of substances in and out of the cell.

2. Cytoplasm: The cytoplasm is a gel-like substance that fills the cell. It contains various organelles, such as mitochondria, endoplasmic reticulum, Golgi apparatus, and ribosomes. These organelles perform specific functions necessary for the cell's survival and proper functioning.

3. Nucleus: The nucleus is often referred to as the control center of the cell. It contains the cell's genetic material, DNA, which carries the instructions for the cell's activities and characteristics. The nucleus is surrounded by a nuclear membrane and contains a dense structure called the nucleolus.

Functions of Cells

Cells perform a wide range of functions that are essential for the survival and functioning of living organisms. Here are some key functions of cells:

1. Cell Growth and Reproduction: Cells are responsible for the growth and reproduction of organisms. They divide and replicate to produce new cells, allowing organisms to grow and develop.

2. Energy Production: Cells generate energy through various metabolic processes. For example, mitochondria, known as the "powerhouses" of the cell, produce energy in the form of ATP through cellular respiration.

3. Protein Synthesis: Cells synthesize proteins, which are essential for various cellular processes. Ribosomes, located in the cytoplasm and attached to the endoplasmic reticulum, are responsible for protein synthesis.

4. Transport of Substances: Cells regulate the movement of substances in and out of the cell. The cell membrane controls the passage of molecules, ions, and nutrients, maintaining the internal environment of the cell.

5. Cell Communication: Cells communicate with each other through chemical signals. This communication is crucial for coordinating various cellular activities and maintaining homeostasis within the organism.

6. Defense and Protection: Some cells, such as immune cells, play a vital role in defending the body against pathogens and foreign substances. They recognize and eliminate harmful invaders to maintain the overall health of the organism.

These are just a few examples of the functions performed by cells. Different types of cells have specialized functions that contribute to the overall functioning of the organism.