01testbank

Suggest the advantages of the change in blood flow in blood vessels during exercise. [3 marks] - answer--more blood flow to muscles during exercise -supplying more glucose and oxygen/ removing carbon dioxide/ lactic acid/ heat -for high rate of respiration/ to meet increased demand for energy Explain how microorganisms contributed to the increase in temperature during processing of organic waste. [2 marks] - answer-respiration produces heat explain the advantage of showing the data using...

Explain what is meant by an inelastic collision - answer-where kinetic energy is not conserved State, in words, the relationship between the force acting on a body and the momentum of the body - answer-Force is the rate of change of momentum State two quantities that are conserved in an elastic collision - answer--momentum -kinetic energy Use Newton's laws of motion to explain how the molecules of a gas exert a force on the wall of a container - answer--force is exerted on molecule by...

In large cells of U. marinum, most mitochondria are found close to the cell-surface membrane. In smaller cells, the mitochondria are distributed evenly throughout the cytoplasm. Mitochondria use oxygen during aerobic respiration. Use this information and your knowledge of surface area to volume ratios to suggest an explanation for the position of mitochondria in large U. marinum cells. - answer-1. Large(r) cells have small(er) surface area to volume ratio; 2. (Takes) longer for oxygen to d...

Describe a biochemical test to show that raffinose solution contains a non-reducing sugar. - answer-First heat the sample with an acid in a water bath and neutralise, then heat with Benedict solution in a water bath for five minutes. A positive test should produce a red precipitate. Explain the arrangement of phospholipids in a cell-surface membrane. - answer-Phospholipids are arranged in a phospholipid bilayer. The hydrophobic fatty acid tails point away from the water and the hydrophilic he...

Root hair cells take up water from the soil. Explain one way in which the root hair cell is adapted to this function. [2 marks] - answer-either large surface area [1] for more / faster osmosis [1] OR allow thin (cell) walls [1] for short(er) diffusion distance [1] Explain why the mean rate of water uptake is higher on a hot day than on a cold day. [3 marks] - answer-(on hot day) more water lost [1] more transpiration or more evaporation [1] so more water taken up ...

What process do plants use to move mineral ions into root cells? - answer-Active transport Describe how water moves from roots to the leaves. - answer-By transpiration stream in xylem. What advantage to a plant does having very few stomata on the upper surface of the leaf have? - answer-Less water lost so it will not wilt. Why should tools used to handle plants with TMV be washed afterwards? - answer-To prevent the virus spreading. How can scientists use a plant with a TMV-resistant ...

two mothers are talking about their respective children Ben and Dido. one of the children has Turner's syndrome and the other has Kleinfelter's syndrome. Ben's mum says 'he had problems at school, and there were physical differences too.' Dido's mum says, 'she did better at schoolwork in some ways than other children. but physically, there will always be noticeable differences.' referring to the comments about Ben and Dido, outline Turner's syndrome and Kleinfleter's syndrome - answe...

A 77-year-old woman with an inoperable brain tumor has been hospitalized for the past 5 days. Her daughter comes to visit her. The patient has asked that her daughter not be told her diagnosis. After visiting with her mother, the daughter asks to speak to the nurse. She says, My mother claims she has pneumonia, but I know she is not telling me the truth. The daughter asks the nurse to tell her what is truly wrong with her mother. The nurse should tell her that: 1) Her mother has an i...

1. Global communicators will probably be most successful if they a. learn to speak the language of the country with which they will be doing business. b. study as many books as possible to learn about the culture of the people with whom they will be doing business. c. learn to be sensitive and flexible in dealing with individuals from other cultures. d. take a class in world religions to prepare them for doing business abroad. 2. Noteworthy changes in today’s dynamic workplace revolve a...

1) Which assessment finding for a 4-month-old infant would require further action by the nurse? 1. The posterior fontanel is open. 2. The infant has good head control when held upright. 3. The infant is able to roll only from abdomen to back. 4. The anterior fontanel is open and soft. - 1. The posterior fontanel is open. 2) The nurse is providing care for a pediatric client in the emergency department (ED) with a diagnosis of decreased level of consciousness (LOC) secondary to increase...