Receptor Types and Functions
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Questions and Answers

What is the primary function of nuclear receptors in cells?

  • To increase calcium concentration in the cytosol
  • To facilitate the release of neurotransmitters
  • To inhibit the activity of intracellular signalling pathways
  • To regulate gene expression and protein synthesis (correct)

What is the characteristic structure found in nuclear receptors?

  • Helix-loop-helix structure
  • Zinc finger structure (correct)
  • G-protein coupled receptor
  • Ligand-gated ion channel

Which type of receptor is activated by inositol triphosphate?

  • Steroid receptor
  • IP3 receptor (correct)
  • G-protein coupled receptor
  • Ryanodine receptor

Where are intracellular receptors commonly found?

<p>Sarcoplasmic reticulum and endoplasmic reticulum (A)</p> Signup and view all the answers

What is the effect of ryanodine receptor activation?

<p>Calcium-induced calcium release (A)</p> Signup and view all the answers

What is the main function of intracellular receptors?

<p>To modulate intracellular signalling pathways (B)</p> Signup and view all the answers

Which type of receptor is involved in the regulation of protein synthesis?

<p>Nuclear receptor (B)</p> Signup and view all the answers

What is the primary function of ligand-gated ion channels?

<p>To allow ions to pass through the pore (B)</p> Signup and view all the answers

Which type of receptor has an extracellular ligand binding site and a pore for ions to pass through?

<p>Ligand-gated ion channels (B)</p> Signup and view all the answers

What is the name of the receptor that has a clamshell/venus fly trap-like extracellular domain with ligand and allosteric binding sites?

<p>Metabotropic glutamate receptor (C)</p> Signup and view all the answers

Which type of receptor is associated with pleiotropic effects?

<p>Intrinsic enzyme receptors (D)</p> Signup and view all the answers

What is the name of the receptor that is activated by ATP and has a pore for ions to pass through?

<p>P2X receptor (C)</p> Signup and view all the answers

How many transmembrane domains do rhodopsin-like receptors have?

<p>7 (A)</p> Signup and view all the answers

What is the name of the receptor that is activated by neurotransmitters and neurohormones?

<p>G-protein coupled receptors (A)</p> Signup and view all the answers

What is the function of metabotropic glutamate receptors?

<p>To activate second messengers (C)</p> Signup and view all the answers
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