cell wall science definition:
The outermost layer of cells in plants, bacteria, fungi, and many algae that gives shape to the cell and protects it from infection. In plants, the cell wall is made up mostly of cellulose, determines tissue texture, and often is crucial to cell function. Compare cell membrane.
The outermost layer of cells in plants, bacteria, fungi, and many algae that gives shape to the cell and protects it from infection. In plants, the cell wall is made up mostly of cellulose, determines tissue texture, and often is crucial to cell function. Compare cell membrane.
cell membrane science definition:
The thin membrane that forms the outer surface of the protoplasm of a cell and regulates the passage of materials in and out of the cell. It is made up of proteins and lipids and often contains molecular receptors. The membranes of organelles within the cell are made of the same basic material as the cell membrane. In plant cells, the cell membrane is surrounded by a rigid cell wall. Also called plasma membrane. Compare cell wall. See more at cell.
The thin membrane that forms the outer surface of the protoplasm of a cell and regulates the passage of materials in and out of the cell. It is made up of proteins and lipids and often contains molecular receptors. The membranes of organelles within the cell are made of the same basic material as the cell membrane. In plant cells, the cell membrane is surrounded by a rigid cell wall. Also called plasma membrane. Compare cell wall. See more at cell.
Nucleus:
The nucleus is the center core of an atom that has a positive charge and that contains most of the atom's mass, or the central heart of an organization or group.
The nucleus is the center core of an atom that has a positive charge and that contains most of the atom's mass, or the central heart of an organization or group.
cytoplasm:
The definition of cytoplasm is the clear, gel-like substance outside the nucleus of the cell of plants and animals.
The definition of cytoplasm is the clear, gel-like substance outside the nucleus of the cell of plants and animals.
chloroplast:
The definition of a chloroplast is a part of a plant that has chlorophyll and conducts photosynthesis.
The definition of a chloroplast is a part of a plant that has chlorophyll and conducts photosynthesis.
mitochondria:
Mitochondria are the structures within cells that produce energy.
Mitochondria are the structures within cells that produce energy.
3. What is the equation for photosynthesis and respiration?
4. Explain how a cell takes in nutrients in order to grow, divide, and make needed materials (hint: think about photosynthesis and respiration.)The cell takes in energy form the sun, and that energy is used by the cell to go through photosynthesis. The photosynthesis makes energy for the cell and allows it to make its own food.
5. Explain the processes of osmosis, diffusion, active transport, and passive transport.Osmosis: Osmosis is the diffusion of the movement of water from a region of higher concentration to a region of lower concentration through a cell membrane or other semi-permeable membrane until an equilibrium is reached. It is a special case of diffusion (passive transport). Diffusion:
Diffusion is the movement of particles from an area of high concentration to an area of low concentration. Diffusion is not to be confused with osmosis, which is the movement of water through a semi-permeable membrane. However, osmosis is a special case of diffusion.Active Transport: When a cell expends energy to move molecules or ions across a membrane, the process is known as active transport.
Active transport is when it takes energy for the cell to take something else in. Passive Transport: Random movement of molecules that lead to a net movement of molecules from a region of high concentration to a region of low concentration. Movement requiring no energy what-so-ever.
Diffusion is the movement of particles from an area of high concentration to an area of low concentration. Diffusion is not to be confused with osmosis, which is the movement of water through a semi-permeable membrane. However, osmosis is a special case of diffusion.Active Transport: When a cell expends energy to move molecules or ions across a membrane, the process is known as active transport.
Active transport is when it takes energy for the cell to take something else in. Passive Transport: Random movement of molecules that lead to a net movement of molecules from a region of high concentration to a region of low concentration. Movement requiring no energy what-so-ever.