What helps the plasma membrane function? (1 point)
Responses
pumps and gelatin-like material
pumps and gelatin-like material
nuclei and endoplasmic reticula
nuclei and endoplasmic reticula
chloroplasts and mitochondria
chloroplasts and mitochondria
channels and chain-like structures
channels and chain-like structures
here are organelles like mitochondria and the Golgi apparatus found? (1 point)
Responses
nucleus
nucleus
chloroplasts
chloroplasts
cytoplasm
cytoplasm
plasma membrane
cytoplasm
Which statement correctly describes the function of pumps in the plasma membrane? (1 point)
Responses
Pumps move substances through the plasma membrane.
Pumps move substances through the plasma membrane.
Pumps store water in the plasma membrane for later use by the cell.
Pumps store water in the plasma membrane for later use by the cell.
Pumps glue the plasma membranes of adjacent cells together.
Pumps glue the plasma membranes of adjacent cells together.
Pumps hold the plasma membrane together.
Pumps hold the plasma membrane together.
Pumps move substances through the plasma membrane.
Which part of the cell functions to recognize other cells? (1 point)
Responses
plasma membrane
plasma membrane
cytoplasm
cytoplasm
cell wall
cell wall
nucleus
plasma membrane
Unicellular cells must carry out ___ of life.(1 point)
Responses
specific functions
specific functions
a single function
a single function
all functions
all functions
a few functions
a few functions
To determine which response helps the plasma membrane function, we need to understand the structure and function of the plasma membrane. The plasma membrane is a phospholipid bilayer that surrounds the cell and acts as a barrier, controlling the movement of substances in and out of the cell.
One important function of the plasma membrane is to maintain the cell's internal environment by selectively allowing certain substances to enter or leave the cell. To achieve this, the plasma membrane relies on various components:
1. Pumps: Protein pumps embedded in the plasma membrane actively transport specific molecules across the membrane, often against their concentration gradient. These pumps require energy in the form of ATP to work.
2. Gelatin-like material: The plasma membrane contains various proteins, including glycoproteins and glycolipids, which are embedded in the phospholipid bilayer. These proteins contribute to the flexibility and stability of the membrane and also play a role in cell recognition and signaling.
3. Nuclei and endoplasmic reticula: Nuclei and endoplasmic reticula are organelles found inside the cell and are not directly involved in the plasma membrane's function. They have their own roles and functions within the cell.
4. Chloroplasts and mitochondria: Chloroplasts and mitochondria are also organelles found inside the cell and are responsible for energy production in plant cells (chloroplasts) and both animal and plant cells (mitochondria). While they are crucial for cellular processes, they are not directly involved in the function of the plasma membrane.
5. Channels and chain-like structures: Channel proteins in the plasma membrane form pores or channels that allow specific molecules to passively move across the membrane. These channels are often selective, meaning they only allow certain substances to pass through. Chain-like structures, such as cytoskeletal elements like microtubules and microfilaments, provide structural support and help maintain the shape of the cell.
Based on this information, the correct response that helps the plasma membrane function is "channels and chain-like structures." Channels facilitate the selective movement of substances across the membrane, while chain-like structures contribute to the membrane's stability and shape.