Date 28 Check Your Understanding Critical Thinking and Application Questions REV

Question

Date 28 Check Your Understanding Critical Thinking and Application Questions REVIEw 1 Explain why diseases caused by mutations in mitochondrial DNA are inherited exclusively from one's mother 2 When the ductus arteriosus fails to close after birth, it results in a condition called patent ductus arteriosus. Predict the signs and symptoms an infant would experience from this condition, and explain your reasoning 3 Placental abruption is a condition in which the placenta is pulled away and separated from the wall of the uterus Why could this prove life-threatening for both the mother and the fetus? "water breaks. " What is the "water" and which 4 Active labor generally is considered to begin about the time the membranes rupture to release it? What could be the potential consequences if the membranes were to rupture too early?

Explanation / Answer

1) mitochondrial DNA is transferred from on parent only that is mother.

It is present in the cytoplasm of the egg cells which after fertilisation forms zygote.

2) signs of PDA:

Respiratory distress

Shortness of breath

Rapid and breathing

Murmur and fast heart rate

Easy fatigue,weakness,lack of feeding ,sweating etc.

3) placental abruption may be fatal to both child and mother,

In mother it may cause; shock due to excessive blood loss, clotting, failure of organs etc.

In foetus it causes,oxygen and nutrient deprivation,stillbirth or premature birth.

4) water means amniotic fluid.

Rupture of amniotic sac causes water breaks,too much stretching of membranes of amniotic sac due to large volume of excessive fluid causes rupture.

Signd; contractions,bloody discharge,baby drops,movements of baby change.

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