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BS Final Part 2A
BS Final Part 2a 2010
| Question | Answer |
|---|---|
| Maintaining human blood pH within a certain range is an example of | homeostasis |
| Maintenance of stable internal environment is known as | homeostasis |
| What happens if an organism fails to maintain homeostasis? | It becomes ill or even dies. |
| If an animal cell swells due to diffusion, is that dynamic equilibrium? | no! |
| What 2 systems control and coordinate all other body systems? | nervous and endocrine |
| What life function involves coordination and control? | regulation |
| Why are feedback interactions important in the human? | They keep the internal body environment within its normal range. |
| Give an ex of an organism responding to a stimulus. | A falling stone makes a salamander jump. |
| Structures that enable most cells to communicate are called... | receptors |
| What is this type of cell? | neuron |
| What are the gaps between neurons called? | synapses |
| Neurons transmit electrochemical signals known as... | impulses |
| Which substances are found on cell surfaces and respond to nerve and hormone signals? | receptors |
| What is a neurotransmitter? | a chemical that helps to relay impulses across a synapse |
| Which structure secretes a neurotransmitter? | axon terminals |
| Identify 2 body systems that help maintain glucose levels in the blood, and how. | endocrine system produces insulin which sends glucose in the blood into body cells, which lowers blood sugar level. Circulatory system because it carries the insulin around the body. |
| What cause a plant stem to bend toward light? | Hormones called auxins. |
| How? | Auxins build up on the dark side and stimulate cell growth. |
| How do guard cells of a leaf hellp to maintain homeostasis in a plant? | control water balance |
| Which system transports hormones from endocrine glands to various tissues? | circulatory |
| An allergic response to pollen is because the body makes... | antibodies |
| How do white blood cells respond to pathogens? | engulf and destroy, produce antibodies, identify invaders for destruction |
| Out of these 3, which are parts of the immune system: white blood cells, antigens, antibodies? | white blood cells and antibodies |
| If the immune system attacks a substance that is usually harmless, it is called an | allergic reaction |
| What substances must a plant get to carry out photosynthesis? | water and carbon dioxide and light |
| If a plant cell organelle takes in sugar and oxygen, and makes ATP, what organelle is it? | mitochondrion |
| All living things use the chemical process of respiration to synthesize... | AATP |
| What do enzymes do? | influence the rate of chemical reactions |
| How can you identify a diagram of synthesis by an enzyme? | Original molecules are small, they get jointed to form a large final molecule. |
| What is another name for enzyme? | catalyst |
| Why will salivary amylase enzyme work on starch but not protein? | It is chemically specific by shape. |
| Which of these terms refers to asexual repro: ovulation, pollination, mitosis, spermatogenesis? | mitosis |
| In an enzyme diagram, how do you recognize the enzyme? | It keeps the same shape and size. |
| What is true of all enzymes, hormones, antibodies and receptors? | They function by shape. |
| How will you know if starch diffuses out of a fake cell suspended in iodine? | The beaker water would turn blue-black. |
| How do starfish reproduce asexually? | regeneration |
| What is a difference btwn budding and binary fission? | In budding the cytoplasm is unequally divided. |
| What is this a graph of? | dynamic equilibrium |
| How does a hydra reproduce asexually? | budding |
| How does bread mold reproduce asexually? | sporulation |
| How can you get a tree that grows multiple kinds of fruits? | grafting |
| If all the members of a grass species are identical, how did it reproduce? | asexually |
| What is the fastest and easiest method to reproduce a desirable fruit tree? | grafting |
| Name 3 organisms that reproduce asexually. | strawberries (runners), amoeba (binary fission) and hydra (budding) |
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