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Bio H test 2
Cells, Organelles, and osmosis
| Question | Answer |
|---|---|
| nucleolus | Contains the parts that make up ribosomes |
| nucleus | the control center that houses a cells dna |
| cytoskeleton | provides shape and helps organelle move around |
| Smooth endoplasmic reticulum | Makes and transports lipids |
| Golgi Apparatus | Modifies,stores, and routes cell products |
| mitochondria | makes ATP and is where cellular respiration occurs |
| vacuoles | stores water |
| chloroplasts | photosynthesis occurs and makes energy in the form of glucose |
| cell membrane | regulates what goes in and out of the cell and provides structure |
| cell wall | provides support and protection |
| rough endoplasmic reticulum | ribosomes here produce protien and this transports the proteins |
| ribosomes | make protein |
| lysosomes | enzymes break down molecules into smaller parts to be recycled |
| cytoplasm | helps maintain chemical environments inside the organelles and holds most of the organelles |
| cell theory | 1. all living things are composed of cells 2. cells are the basic unit of life (structure and function) 3.all cells come from pree-existing cells |
| prokaryotic cell | Lacks nucleus and many of the organelled |
| Eukaryotic cell | Has a nucleus and many organelles |
| what are examples of a prokaryotic cell? | bactera and archaea |
| what are examples of a eukaryotic cell? | plants, animals, protists, and fungi |
| what is an organelle? | each part of a cell with a specific job to do |
| what do the cytoskeleton, flagella, and cilia have in common | they all help with the movement of the cell |
| phospholipid bilayer | two layers of molecules formed by phospholipids at boundaries that surrounds the organelle or cell that has a key role in membrane function |
| how do the tails of a phospholipid feel about water | they are hydrophobic |
| how do the heads of a phospholipid feel about water | they are hydrophilic |
| what is the path of a protein in a cell | it would be made in the RER in ribosomes and transported to the golgi apparatus and then one of 3 options- shipped out of the cell, stored, or sent to lysosomes to be broken down |
| what organelles are only in plant cells | chloroplast, cell wall, and a large central vacuole |
| what organelles are only found in animal cells | lysosomes, flagella, and centrioles |
| what is common to all cells? | ribosomes, plasma membrane, cytoplasm, and DNA |
| what shapes are a plant cell like under a microscope? | squares |
| what shape is an animal cell under a microscope? | blob- no set shape |
| what types of substances are transported through passive transport | nonpolar only |
| what types of substances are transported through facilitated diffusion | polar only |
| what types of substances are transported through active transport | either polar or nonpolar |
| endocytosis | moves large molecules into a cell within vescicles that bud inward from the plasma membrane |
| exocytosis | moves large molecules out of a cell by a vescicle fusing with the plasma membrane |
| what is the concentration gradient for passive transport | high to low |
| what is the concentration gradient for facilitated diffusion | high to low |
| what is the concentration gradient for active transpot | low to high |
| is energy needed for active transport | yes |
| is energy needed for passive transport or facilitated diffusion? | no |
| is there a membrane protein for passive transport | no |
| is there a membrane protein for facilitated diffusion or active transport | yes |
| equillibrium | point at which the number of diffusing molecules moving in one direction is equal to the number moving in the opposite direction |
| permeable | the molecule can pass through the membrane freely |
| selectively permeable membrane | lets some of the substances cross the membrane for eaily than others |
| transport proteins | help move certain substances across a membrane |
| what are phospolipids made of | lipids and proteins |
| how is a phospolipid structured | like a fat molecule but with 2 fatty acids instead of three where 2 are hydrophobic and 1 negatively charges is hydrophillic |
| hypotonic | having a higher concentration of solute in cell than in the solution and water moves in |
| hypertonic | having a lower concentration of a solute in the cell than in the solution and water moves out |
| isotonic | solutions in which the concentrations are said to be equal and water moves in and out |
| what kind of solution is an animal cell healthiest in | isotonic |
| what kind of solution is a plant cell healthiest in and why | hypotonic because it needs an abundance of water to survive |
| what would happen to an animal cell in a hypotonic solution | it gets huge and could pop |
| what would happen to an animal cell in a hypertonic solution | it would shrivel and die |
| what would happen to plant cell in isotonic solution | it would become limp and wilt |
| what would happen to plant cell in hypertonic solution | it would usually kill the cell and the plant would shrivel and the cell membrane would pull away from the cell wall |
| diffusion | net movement of the particles of a substance from where they are more to where they are less concentrated |
| osmosis | passive transport of water across a selectively permeable membrane |