Oxytocin Production and Receptor Activation

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Questions and Answers

What is the main function of oxytocin in the mammary gland?

  • Stimulate contractions of the reproductive tract
  • Aid sperm transport during ejaculation
  • Regulate pair-bond formation
  • Induce contraction of myoepithelial cells to force milk into ducts (correct)

Which reflex is associated with suckling by the newborn at the teats or nipple?

  • Unconditioned reflex or Ferguson reflex (correct)
  • Luteolysis reflex
  • Neurotransmitter reflex
  • Conditioned reflex or Ferguson reflex

What is oxytocin's role in luteolysis?

  • Essential for regression of corpus luteum in case of failure of pregnancy (correct)
  • Stimulate contractions of the reproductive tract
  • Regulate pair-bond formation
  • Induce sperm transport during ejaculation

Which process involves oxytocin being released during ejaculation?

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

What additional function is oxytocin known for, beyond its role in milk let down?

<p>Recognizing familiar human faces (B)</p> Signup and view all the answers

Which receptor is activated by oxytocin leading to calcium influx into the cell?

<p>G-protein Coupled Receptor (GPCR) (D)</p> Signup and view all the answers

What is the primary stimulus for the release of oxytocin during labor?

<p>Stretching of the cervix (D)</p> Signup and view all the answers

What physiological function does oxytocin serve in birds?

<p>Inducing labor contractions (B)</p> Signup and view all the answers

Which gland stores oxytocin after its synthesis by hypothalamic neurons?

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

What is the key target of calcium ions that influx into the cell upon oxytocin activation?

<p>Myosin light-chain kinase (C)</p> Signup and view all the answers

During the second and third stages of labor, what forms a positive feedback loop enhancing uterine contractions?

<p>Increase in oxytocin receptors in myometrium (C)</p> Signup and view all the answers

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