1) A young man is in an accident that crushes his spinal cord at the neck and leaves him paralyzed from the neck down. The man asks his physician if he will be able to have erections and father any children. What should the doctor tell him? Explain your answer.

2. A breast-feeding woman leaves her baby at home and meets a friend for dinner. Two tables over, a baby is crying and the woman notices her shirt becomes wet from leaking milk. Explain the physiological link between hearing that sound and the ejection of milk.

3. A woman has a mutation that causes the zona pellucida to be tough and not disintegrate after the egg was fertilized. How would this affect her fertility? Explain.

Answer:

1) paralyzed men tend to have some difficulty with sexual function . He can be triggered by reflexogenic or spontaneous means but psychogenic isn't possible. Psychogenic is the erection due to visual or thought stimulus, whereas erection can occur during complete filling of the bladder as well and that occurs in reflex and spontaneous means.

It is tough but very rarely men get erection and ejaculations after quadriplegia.

2) it is the bond between the mother and the infant. The brain of the mother gets activated if the child cries, or sucks the nipple, or massages. As soon as the baby cries the milk letting down reflex start to activate in mothers. With the oxytocin release, followed by the milk ejection .

3)The outer shell of the embryo could be too hard or thick which does not allow hatching of the embryo out of its shell (Zona Pellucida). This results in lower chance of implantation. A genetic abnormality with the embryo may lead to infertility.