Radula: Feeding Mechanism in Mollusks
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Questions and Answers

What is the function of the radula?

  • Sensation
  • Feeding (correct)
  • Reproduction
  • Respiration

What are the 'teeth' on the radula made of?

  • Enamel
  • Bone
  • Chitin (correct)
  • Cartilage

Which type of signaling molecule travels over short distances by diffusion and helps regulate blood pressure, nervous system function, and reproduction?

  • Neurohormones
  • Hormones
  • Local regulators (correct)
  • Neurotransmitters

How does the food mix with liquids for digestion after being broken off by the radula?

<p>In the digestive system (B)</p> Signup and view all the answers

In which type of signaling do non-hormonal chemical signals called local regulators elicit responses in nearby target cells?

<p>Paracrine signaling (C)</p> Signup and view all the answers

Which system is a slower responding system that influences all cells by means of hormones?

<p>Endocrine system (D)</p> Signup and view all the answers

What type of cell communications involve pores in the cell membrane that allow signaling chemicals to move from cell to cell?

<p>Gap junctions (D)</p> Signup and view all the answers

Which part of the pituitary gland stores and secretes two hormones that were synthesized in the hypothalamus: oxytocin and ADH?

<p>Posterior Pituitary (D)</p> Signup and view all the answers

Which system influences all cells by means of hormones and is slower responding?

<p>Endocrine system (B)</p> Signup and view all the answers

What type of cell communications involve pores in the cell membrane that allow signaling chemicals to move from cell to cell?

<p>Gap junctions (B)</p> Signup and view all the answers

Which part of the pituitary gland secretes hormones like ACTH, TSH, LH, FSH, GH, and Prolactin?

<p>Anterior Pituitary (B)</p> Signup and view all the answers

What are the types of secreted signaling molecules mentioned in the text?

<p>Hormones, Local regulators, Neurotransmitters, Neurohormones, Pheromones (C)</p> Signup and view all the answers

What type of signaling molecule travels over short distances by diffusion and helps regulate blood pressure, nervous system function, and reproduction?

<p>Local regulators (D)</p> Signup and view all the answers

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