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MASTERY ASSIGNMENT Biology 30 Unit A: Nervous and Endocrine System 1. Which refers to the maintenance of a relatively constant internal environment? (A) (B) (C) (D) 2. Which work together to respond to emergency situations? (A) (B) (C) (D) 3. Potassium ions move inside the axon during depolarization. Potassium ions move outside the axon during depolarization. The inside of the cell is negatively charged at rest. The outside of the cell is negatively charged at rest. From which structure below does the cell body collect information? (A) (B) (C) (D) 6. brain meninges sensory nerves pupil constriction Which statement about neurons is true? (A) (B) (C) (D) 5. parasympathetic nervous system and adrenaline parasympathetic nervous system and glutamate sympathetic nervous system and adrenaline sympathetic nervous system and glutamate Which structure is part of the parasympathetic nervous system? (A) (B) (C) (D) 4. equilibrium homeostasis negative feedback positive feedback A B C D The ability to understand and answer questions is controlled by which structure of the brain? (A) (B) (C) (D) cerebellum cerebrum hypothalamus medulla oblongata 7. The graph below shows the distance a nerve impulse travelled over time for two different neurons (X and Y). What conclusion can best be drawn from the graph? (A) (B) (C) (D) 8. Which condition is caused by the buildup of fluid between the lens and cornea? (A) (B) (C) (D) 9. astigmatism glaucoma hyperopia myopia What is the order of structures through which sound waves travel into the human ear? (A) (B) (C) (D) 10. X is influenced by an anaesthetic and Y is influenced by caffeine. X is myelinated and Y is unmyelinated. Y is influenced by an anaesthetic and X is influenced by caffeine. Y is myelinated and X is unmyelinated. auditory canal -+ eardrum -+ ossicles auditory canal -+ ossicles -+ eardrum eardrum -+ auditory canal -+ ossicles eardrum -+ ossicles -+ auditory canal In which structure of the human ear does an imbalance result in motion sickness? (A) (B) (C) (D) auditory canal eustachian tube semicircular canal tympanic membrane 11. Which gland releases ACTH? (A) (B) (C) (D) 12. How does insulin affect blood in a normal human body? (A) (B) (C) (D) 13. (b) decreases calcium levels decreases glucose levels increases calcium levels increases glucose levels Which best describes the action of a drug that stimulates weight loss? (A) (B) (C) (D) 14. adrenal pineal pituitary thyroid decreases the activity of the thymus gland decreases the activity of the thyroid gland increases the activity of the thymus gland increases the activity of the thyroid gland (a) A child shows abnormal growth of bone tissue causing extra long legs and arms. What is the probable cause of this condition and give two ways it can be treated? In what three ways does the response of a nerve differ from the response of a hormone? Biology 3201 August 2005 Page 16 of 16