Terra is Rh-negative and her husband, Marcus, is Rh-positive. Advise Terra about the consequences of this blood type incompatibility
What will be an ideal response?
Terra should know that when inherited blood types of mother and fetus differ, serious problems sometimes result. The most common cause of these difficulties is Rh factor incompatibility, which occurs in situations like Terra's, when the mother is Rh-negative (lacks the Rh blood protein) and the father is Rh-positive (has the protein). Because the father has the protein, the baby may inherit the father's Rh-positive blood type. If even a little of a fetus's Rh-positive blood crosses the placenta into the Rh-negative mother's bloodstream, she begins to form antibodies to the foreign Rh protein. If these enter the fetus's system, they destroy red blood cells, reducing the oxygen supply to organs and tissues. Mental retardation, miscarriage, heart damage, and infant death can occur. It takes time for the mother to produce Rh antibodies, so firstborn children are rarely affected. The danger increases with each additional pregnancy. Fortunately, Rh incompatibility can be prevented in most cases. After the birth of each Rh-positive baby, Rh-negative mothers are routinely given a vaccine to prevent the buildup of antibodies.
You might also like to view...
A drug that mimics or increases the effects of a neurotransmitter is called a(n) ____
a. agonist b. antagonist c. stimulant d. protagonist
Why did Kuhl describe young infants as "citizens of the world"?
a. because they are born equally ready to acquire any of the world's languages b. because they enjoy music from all cultures in the world c. because they retain the ability to identify the phonemes of all the world's languages d. because their senses develop at about the same rate regardless of where they are born
Discuss the strengths and weaknesses of the traditional interview and the structured interview for assessing job candidates. Give examples.
What will be an ideal response?
Samantha is about to hand Megan a notebook that contains her biological psychology notes. Which of the following correctly describes how Megan's muscles will react to the heavy notebook?
A. The weight of the notebook will cause Megan's arm muscles to contract. This information will be sensed by mechanoreceptors around her joints and sent to her spinal cord via Ib fibers. The Ib fibers will excite gamma motor neurons, which will cause her arm to contract further to adjust to the heavier weight of the book. B. The weight of the notebook will cause Megan's arm muscles to stretch. This information will be sensed by her spindles and sent to her spinal cord by gamma motor neurons. The gamma motor neurons will inhibit the alpha motor neurons, causing her arm muscles to relax enough that she won't drop the book. C. The weight of the notebook will cause Megan's arm muscles to contract. This information will be sensed by her Golgi tendon organs and sent to her spinal cord by Ib sensory fibers. The Ib sensory fibers will excite alpha motor neurons that will cause her arm muscles to stretch enough that she won't drop the book. D. The weight of the notebook will cause Megan's arm muscles to stretch. This information will be sensed by her spindles and sent to her spinal cord by Ia sensory fibers. The Ia sensory fibers will excite alpha motor neurons that will cause her arm muscles to contract enough that she won't drop the book.