Biology Chapter 10: Human Ear and Hearing
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Biology Chapter 10: Human Ear and Hearing

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Questions and Answers

What is the primary function of the parts of the internal ear indicated in Figure 2.12?

  • To maintain body balance (correct)
  • To generate impulses for hearing
  • To detect taste
  • To aid in the detection of smell
  • What is the result of structural deformities or diseases of the ears?

  • Smell impairment
  • Body imbalance
  • Taste impairment
  • Deafness (correct)
  • What is the function of chemoreceptors in the tongue?

  • To detect light
  • To detect taste (correct)
  • To detect smell
  • To detect sound waves
  • What is the purpose of a hearing aid?

    <p>To amplify sound</p> Signup and view all the answers

    What is the role of saliva in the detection of taste?

    <p>It stimulates the chemoreceptors</p> Signup and view all the answers

    What are the small projected structures seen on the surface of the tongue?

    <p>Papillae</p> Signup and view all the answers

    What is the primary organ affected by tuberculosis?

    <p>Lungs</p> Signup and view all the answers

    How does the Mycobacterium tuberculosis pathogen spread to others?

    <p>When the patient speaks, coughs, or sneezes</p> Signup and view all the answers

    What is the purpose of the BCG vaccine?

    <p>To prevent tuberculosis</p> Signup and view all the answers

    What is the characteristic feature of a virus?

    <p>It has a simple structure with a DNA or RNA molecule within a protein coat</p> Signup and view all the answers

    How does a virus multiply?

    <p>By taking control over the genetic mechanism of the host cells</p> Signup and view all the answers

    What type of disease is Nipah?

    <p>Viral disease</p> Signup and view all the answers

    What is the primary cause of cretinism?

    <p>Deficiency of thyroxine during the foetal stage or infancy</p> Signup and view all the answers

    Which of the following symptoms is NOT associated with myxoedema?

    <p>Increased heart rate</p> Signup and view all the answers

    What is the main function of iodine in relation to thyroxine?

    <p>Essential for the production of thyroxine</p> Signup and view all the answers

    Which of the following conditions is characterized by a high metabolic rate and weight loss?

    <p>Hyperthyroidism</p> Signup and view all the answers

    What is the effect of thyroxine deficiency on the body?

    <p>Sluggishness and weight gain</p> Signup and view all the answers

    What is the term for the enlargement of the thyroid gland due to iodine deficiency?

    <p>Goitre</p> Signup and view all the answers

    Which of the following is NOT a mode of transmission of HIV?

    <p>Through touch or shaking hands</p> Signup and view all the answers

    What is the major symptom of Hepatitis?

    <p>Inflammation of the liver</p> Signup and view all the answers

    Which of the following diseases is transmitted through mosquitoes?

    <p>Dengue fever and Chikungunya</p> Signup and view all the answers

    What is the cause of an increase in the level of bilirubin in blood in Hepatitis?

    <p>Blockage of the flow of bile secreted by the liver</p> Signup and view all the answers

    Which of the following is a common symptom of Hepatitis?

    <p>Dark yellow color of the mucus membrane, white portion of the eyes and the nails</p> Signup and view all the answers

    What is a mode of transmission of certain types of Hepatitis?

    <p>Through contaminated food and water</p> Signup and view all the answers

    What is a common scenario that can lead to the spread of various communicable diseases?

    <p>Existence of conditions suitable for the multiplication and transmission of pathogens</p> Signup and view all the answers

    What is the primary mode of transmission of diseases depicted in Illustration 4.1?

    <p>Cough, sneezing, and contact</p> Signup and view all the answers

    What is a significant consequence of floods in terms of disease spread?

    <p>Increased risk of rat fever and other communicable diseases</p> Signup and view all the answers

    What is the role of microorganisms in the context of diseases?

    <p>Some microorganisms are pathogens, while others are beneficial</p> Signup and view all the answers

    What is a crucial step in preventing the spread of communicable diseases in flood-affected areas?

    <p>Improving sanitation and hygiene facilities</p> Signup and view all the answers

    What is a potential outcome of inadequate disease prevention measures in flood-affected areas?

    <p>Outbreak of communicable diseases, including rat fever</p> Signup and view all the answers

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