Biology Chapter 9 Class 12th Quiz
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Questions and Answers

Which region of the retina lacks rods and cones?

  • Macula
  • Optic nerve
  • Fovea
  • Optic disc (correct)
  • Which hormone is responsible for the growth of the thyroid gland?

  • Cortisol
  • Calcitonin
  • Thyroid-stimulating hormone (TSH) (correct)
  • Insulin
  • What is the other name for the Dentist's nerve?

  • Facial nerve
  • Maxillary nerve
  • Mandibular nerve
  • Trigeminal nerve (correct)
  • Which hormone stimulates liver and muscles for glycogenesis?

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

    What property relates to nerve fibres' ability to conduct electrical impulses?

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

    What are the functions of the cerebellum?

    <p>Regulation of balance and coordination of voluntary movements</p> Signup and view all the answers

    Which hormones stimulate the liver for glycogenesis and glycogenolysis?

    <p>Insulin and Glucagon</p> Signup and view all the answers

    Why are all spinal nerves classified as mixed type?

    <p>They contain both sensory and motor fibers</p> Signup and view all the answers

    Which disease is characterized by low BMR, delayed puberty, and mental retardation?

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

    How do sympathetic and parasympathetic nervous systems differ in terms of pre and post ganglionic nerve fibers?

    <p>Sympathetic has short pre-ganglionic fibers and long post-ganglionic fibers, while parasympathetic has long pre-ganglionic fibers and short post-ganglionic fibers</p> Signup and view all the answers

    What is the mechanism of hormone action through membrane receptors using a suitable example?

    <p>Binding of water-soluble hormones to G-protein coupled receptors on cell membranes</p> Signup and view all the answers

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