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Oxytocin Production and Receptor Activation

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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?

Mating spermiation Signup and view all the answers

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

Recognizing familiar human faces Signup and view all the answers

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

G-protein Coupled Receptor (GPCR) Signup and view all the answers

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

Stretching of the cervix Signup and view all the answers

What physiological function does oxytocin serve in birds?

Inducing labor contractions Signup and view all the answers

Which gland stores oxytocin after its synthesis by hypothalamic neurons?

Posterior pituitary gland Signup and view all the answers

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

Myosin light-chain kinase Signup and view all the answers

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

Increase in oxytocin receptors in myometrium Signup and view all the answers