Bleeding or spotting later in pregnancy may be a sign of a serious problem, like: 1  Preterm labor. This is labor that happens too early, before 37 weeks of pregnancy. 2  Placenta previa. This is when the placenta lies very low in the uterus and covers all or part of the cervix. 3  Placental abruption.
Afferent definition, bringing to or leading toward an organ or part, as a nerve or arteriole (opposed to efferent). See more.
(To help you remember these names: afferent = carrying to [ad = to in Latin]; efferent = carrying from [ex = from or out in Latin]; motor = what makes you move.). Figure 1. Peripheral Nervous System (PNS) carries neural signals from the body to the Central Nervous System (CNS) and from the CNS out to the body.o return to the exercise, close this browser window. Peripheral Nervous System Figure 1. Peripheral Nervous System (PNS) carries neural signals from the body to the Central Nervous System (CNS) and from the CNS out to the body.