Human Biology MCQ Unit 3 1 Stimulation of

Human Biology MCQ Unit 3

1. Stimulation of the sympathetic nerves causes A. B. C. D. Vasoconstriction of arterioles in the skin Vasoconstriction of the coronary arterioles Vasodilation of arterioles of the gut Vasodilation of arterioles in the salivary glands

2. The somatic nervous system controls the A. B. C. D. Skeletal muscles Heart and blood vessels Endocrine glands Muscular wall of the gut

3. The speed of impulse transmission along an axon is promoted by A. B. C. D. Diffusion of neurotransmitters Converging neural pathways Diverging neural pathways Myelination of fibres

4. Which of the following statements about diverging neural pathways is correct? A. They accelerate the transmission of sensory impulses B. They suppress the transmission of sensory impulses C. They increase the degree of fine motor control D. They decrease the degree of fine motor control

5. The retrieval of information from long term memory is often aided by remembering the situation in which the information was encoded. This is described as using A. B. C. D. Contextual cues Chunking techniques Rehearsal methods Memory span

6. A child who was scratched by a black cat, now responds with fear of all cats. This is an example of A. B. C. D. Shaping Re-enforcement Generalisation discrimination

7. The average lifespan of people in Britain increased from 50 to 75 between 1900 and 1990. The % increase in lifespan during this period was A. 25% B. 45% C. 50% D. 75%

8. In the nitrogen cycle which of the following processes is carried out by nitrifying bacteria? A. B. C. D. Nitrate to ammonia Ammonia to nitrate Nitrogen gas to ammonia Nitrogen gas to nitrate

9. Which of the following pairs of gases are the biggest contributors to the greenhouse effect? A. B. C. D. Oxygen and carbon dioxide Ozone and carbon dioxide Methane and ozone Methane and carbon dioxide

10. The transformation of information into a form that the memory can accept is called A. B. C. D. Encoding Shaping Rehearsal Storage

11. The rewarding of patterns of behaviour which approximate to desired behaviour is called: A. B. C. D. Generalisation Discrimination Shaping Imitation

12. A country has a population of 50 million. What is the likely increase in the population over a 2 year period, given a growth rate of 1% per annum? A. B. C. D. 1 000 1 005 000 1 050 000 2 000

13. Which of the following processes results in addition of carbon dioxide to the atmosphere? A. B. C. D. Decomposition Photosynthesis Ozone depletion Nitrogen fixation

14. Rivers polluted with raw sewage have low concentrations of oxygen as a direct result of A. B. C. D. Large numbers of bacteria Algal blooms Fertiliser run off Low nutrient levels

15. Which of the following responses is caused by stimulation of the sympathetic nervous system? A. B. C. D. Increase in insulin production Increase in heart rate Increase in flow of saliva Increase in peristalsis

16. Information is transferred between the two cerebral hemispheres of the brain by the: A. B. C. D. Corpus callosum Medulla oblongata Cerebellum Hypothalamus

17. The development of phenotype is influenced by: A. B. C. D. Genetic factors only Genetic factors and nutrition only The environment and genetic factors only

18. The interdependent biological and physical components in an area make up: A. B. C. D. A habitat An ecosystem A food web A community

19. What would be the effect of raw sewage on the oxygen and nitrate concentrations of water? A. Both would increase B. Oxygen would increase and nitrate would decrease C. Oxygen would decrease and nitrate would increase D. Both would decrease

20. Which parts of the body are controlled by the largest motor area of the cerebrum? A. B. C. D. Hands and lips Feet and hands Legs and feet Legs and arms