DVD: KEEPING IT TOGETHER – CELL MEMBRANES

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  1. What invention finally enabled scientists to see cells?
  1. Differentiate between the two main types of cells.
  1. Plant cells have a cell ______. What is the function of this structure?
  1. ______cells have a cell membrane.
  1. What is included in the cytoplasm?
  1. What activities occur in the cytosol?
  1. What is the cytoskeleton?
  1. The energy transformers of the cell are called ______. These organelles transform energy from glucose into ______.
  1. Differentiate between rough and smooth endoplasmic reticulum.
  1. What is the function of the Golgi apparatus?
  1. ______are only found in photosynthesizing cells.
  1. Explain the importance of having membranes around certain organelles inside a cell.
  1. Why are membranes called semi-permeable?
  1. Why is the cell membrane called a bilayer?
  2. Sketch a phospholipid molecule. Show the hydrophilic and hydrophobic ends of the molecule. What do the terms hydrophilic and hydrophobic mean?
  1. Describe the location and function of the following membrane proteins:
  2. transport –
  1. receptor –
  1. adhesion –
  1. recognition – (combined with ______)
  1. State two functions that cholesterol molecules perform on the cell membrane.
  1. ______transport does not require energy. One example is called ______.
  1. Explain how concentration gradients apply in terms of substances moving through cell membranes.
  1. Name two substances that can go straight through cell membranes. What qualities enable them to move straight through?
  1. How do water-soluble substances such as sugars and amino acids move through the membrane? This is called ______diffusion.
  1. The movement of water across cell membranes is called ______.
  1. Describe the different effects of water moving into a plant cell vs. an animal cell.
  1. Define the terms/give examples of the processes in plants:
  2. turgor –
  1. plasmolysis –
  1. In the demonstration involving a sausage casing and egg white, why can’t protein permeate the sausage membrane?
  1. In ______transport, specific carrier proteins move substances from areas of ______concentration to areas of ______concentration, using energy from ______.
  1. What happens to the carrier protein that enables it to move substances across the membrane?
  1. A common example of a membrane pump is the ______pump. Describe why this is important in the human body.
  1. Describe the other processes for moving substances into/out of a cell: (use diagrams if needed)
  2. endocytosis –
  1. exocytosis –
  1. What advantages does having a high surface area-to-volume ratio have for an organism?