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Karnataka PUC I Neural Control and Chemical Coordination — practice questions — page 2

Explore 50 free Neural Control and Chemical Coordination questions in Karnataka PUC I Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Neural Control and Chemical Coordination questions and exercises with answers

Showing questions 31–50 of 50.

Parathyroid hormone acts on blood calcium byRead the answer and worked solution →Thyrocalcitonin, which regulates blood calcium, is secreted by theRead the answer and worked solution →How many parathyroid glands are present in humans?Read the answer and worked solution →Melatonin, which helps regulate the daily rhythm of the body, is secreted by theRead the answer and worked solution →Thymosins, which act on the immune system, are secreted by theRead the answer and worked solution →Which gland makes it?Read the answer and worked solution →Judge the nerve fibre claimsRead the answer and worked solution →True or false: the hormonesRead the answer and worked solution →Judge the hormone claimsRead the answer and worked solution →Sort the neuron by its shapeRead the answer and worked solution →Complete the blood sugar loopRead the answer and worked solution →Tap the one that does not fitRead the answer and worked solution →Fire an impulse across a synapseRead the answer and worked solution →Catch the forebrain partsRead the answer and worked solution →Sort the two axon typesRead the answer and worked solution →Split resting from action potentialRead the answer and worked solution →Mark nine hormones on the boardRead the answer and worked solution →Drag each hormone to its glandRead the answer and worked solution →Place glucagon and insulin traitsRead the answer and worked solution →Spot the false hormone claimRead the answer and worked solution →

Worked practice questions

Parathyroid hormone acts on blood calcium by

  1. decreasing calcium levels
  2. leaving calcium unchanged
  3. converting calcium to phosphate
  4. increasing calcium levels
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Correct answer: D. increasing calcium levels

1. PTH secretion is itself regulated by circulating calcium levels. 2. Parathyroid hormone increases the calcium levels in the blood. 3. It stimulates bone resorption, releasing calcium from bone. 4. It also increases reabsorption of calcium by the renal tubules and absorption from digested food. _Source: syllabus Biology Ch19 'Chemical Coordination and Integration', section 19.2.5_

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Thyrocalcitonin, which regulates blood calcium, is secreted by the

  1. thyroid gland
  2. parathyroid gland
  3. pineal gland
  4. thymus
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Correct answer: A. thyroid gland

1. Two glands sit close together in the neck and both influence calcium. 2. The parathyroid glands secrete parathyroid hormone, which raises calcium. 3. The thyroid gland also secretes a protein hormone called thyrocalcitonin. 4. Thyrocalcitonin regulates the blood calcium levels. 5. Attributing TCT to the parathyroid is the trap set by their names and position. _Source: syllabus Biology Ch19 'Chemical Coordination and Integration', section 19.2.4_

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How many parathyroid glands are present in humans?

  1. Two
  2. Four
  3. Six
  4. One
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Correct answer: B. Four

1. The parathyroid glands lie on the back side of the thyroid gland. 2. There is one pair in each of the two lobes of the thyroid. 3. Two pairs makes four glands in total. 4. Their position explains why they are at risk during thyroid surgery. _Source: syllabus Biology Ch19 'Chemical Coordination and Integration', section 19.2.5_

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