Increased sympathetic tone on the cervix causes which effect?

Increased sympathetic tone on the cervix causes which effect?

• A. Increased cervical tone
• B. Vasodilation
• C. Relaxation of cervix
• D. Sensation from fundus

Answer: (C)

Increased sympathetic input to the cervix acts on adrenergic receptors in the cervical smooth muscle. Activation of these receptors, especially β2, promotes relaxation of smooth muscle, so the cervical tissue becomes less tight. This is the reason the correct effect is relaxation of the cervix. Vasodilation is not the direct outcome of sympathetic action on the cervix itself (vasoconstriction is more typical for many vessels via α receptors), and sensation from the fundus isn’t a direct result of changing cervical tone.

Increased sympathetic input to the cervix acts on adrenergic receptors in the cervical smooth muscle. Activation of these receptors, especially β2, promotes relaxation of smooth muscle, so the cervical tissue becomes less tight. This is the reason the correct effect is relaxation of the cervix. Vasodilation is not the direct outcome of sympathetic action on the cervix itself (vasoconstriction is more typical for many vessels via α receptors), and sensation from the fundus isn’t a direct result of changing cervical tone.