Passive Transport (Section 5-1) Answer Sheet VOCABULARY REVIEW Explain the relationship between the terms in each of the following pairs of terms. 1. concentration gradient‚ diffusion: A difference in the concentration of molecules in two areas‚ called a concentration gradient‚ can result in diffusion‚ the movement of molecules from the area of higher concentration to the area of lower concentration. 2. osmosis‚ turgor pressure: Osmosis is the diffusion of water molecules across a cell membrane
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1. Phospholipid: Molecule that forms a double-layered cell membrane; consists of a glycerol‚ a phosphate group; and two fatty acids. 2. Selectively permeable (Semi): Condition or quality of allowing some‚ but not all‚ materials cross a barrier or membrane. 3. Receptor: Protein that detects a signal molecule and performs an action in response. 4. Diffusion: Movement of dissolved molecules in a fluid or gas from a region of higher concentration to a region of lower concentration. 5. Osmosis: Diffusion
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* Question 1 1 out of 1 points | | | Which of the following is NOT a domain of life?Answer | | | | | Selected Answer: | Animalia | Correct Answer: | Animalia | | | | | * Question 2 1 out of 1 points | | | Polar molecules share electrons equally.Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 3 1 out of 1 points | | | Which of the following is NOT a characteristic of life?Answer | | | |
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What are bodily systems?- Bodily systems are basically default programmes within our body that pickup information from within or the external environment and trigger an automated response. For example if you were to run‚ your body would increase its heart rate to match the oxygen demand made by the muscles. This is done without thinking and it is made possible by how the brain has cleverly integrated with all the bodily systems‚ from the digestive system to the circulatory system. It is critical
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DNA‚ assembles Ribosomes. * Endoplasmic Reticulum Smooth- does the synthesis of lipids. * Endoplasmic Reticulum Rough- is responsible for protein manufacturing. * Vacuoles- accumulates excess water and pumps it out to pores. * Golgi Apparatus- sorts‚ packages and transports substances. * Vesicles- * Lysosomes- responsible for digestion of waste materials. * Mitochondria- responsible for the production of ATP (energy). * Chloroplast- responsible for photosynthesis.
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Gabriela Rios-Martinez March 1‚ 2014 BIO 141 Exam 1 Study Questions Chapter 1: Biology and the Tree of Life (#1 – 4) 1. What is the difference between a hypothesis and a scientific Theory? Between a hypothesis and a prediction? What kinds of hypotheses are useful for scientific investigations that try to explain the natural world‚ and which are not? Give one or more examples of hypotheses that are and are not scientifically useful. (a.) A scientific theory has two components; a pattern
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Definition/comparison questions Evolution / Selection Evolution is a slow continuous process of change that happens in plants and animals over a long period of time resulting in a change from simpler to more complex forms. This is the reason modern day plants and animals are different from those of past. The competition for resources will favour organisms with better adaptability and certain variations over others hence leading to change in the rate of occurrence of certain traits within that population
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The Importance of Calcium Ions Alyssa Foels 12 February 2015 Kilfe Calcium is a cation‚ a positively charged atom‚ and it is essential to all living things. It was first discovered in 1808 by Humphrey Davy. When forming an ionic bond with other elements‚ calcium loses electrons to make its valence shell stable. This means that it has more protons than electrons‚ making it have a slight positive charge (Calcium). Calcium has many roles and functions in the human body. Calcium ions are the
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depending on what cell they are in. They possess a single membrane‚ which is a lipid bilayer and are attached to different organelles depending on the cell. They have been found organelles such as mitochondria‚ rough endoplasmic reticulum‚ and the Golgi apparatus. Researchers have suggested that the difference in positioning is potentially attributed to the functionality needed by the glycosome for different
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Their DNA is found directly in the cytoplasm since they have no nucleus. Eukaryotes are much more complex and bigger. They have membrane bound organelles for specific functions. Some organelles inside eukaryotic cells include: the nucleus‚ the golgi apparatus‚ the mitochondria‚ the chloroplast‚ the endoplasmic reticulum
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