Question

question 11
which alternative correctly pairs a prenatal structure with its description?
amniotic sac—transfers material to the fetus
placenta—fluid-filled reservoir, acts as a cushion and temperature regulator
amniotic sac—fluid-filled reservoir, acts as a cushion and temperature regulator,
umbilical cord—organ allowing exchange of nutrients with the mother
question 12
based on harlows research with monkeys, what is the most helpful thing you can do for a frightened infant or child?
leave them alone
offer them something good to eat
talk to them
touch or hold them

Explanation:

Question 11

• Analyze each option:
• Amniotic sac: It is a fluid - filled reservoir (amniotic fluid inside), and this fluid acts as a cushion to protect the fetus and also helps in temperature regulation. The structure that transfers material to the fetus is the placenta, not the amniotic sac.
• Placenta: Its function is to transfer materials (nutrients, oxygen, waste exchange) between the mother and the fetus, not to be a fluid - filled reservoir.
• Umbilical cord: It is a structure that connects the fetus to the placenta and transports materials, not an organ for direct exchange with the mother (the placenta does that exchange).

Harlow's research with monkeys showed the importance of contact comfort. Infant monkeys preferred the cloth - covered "mother" (providing contact comfort) over the wire "mother" with food. For a frightened infant or child, touch or holding (providing contact comfort) is most helpful. Leaving them alone is not helpful, offering food is less important than contact comfort, and just talking may not be as effective as physical contact in providing comfort based on Harlow's findings.

Answer:

C. amniotic sac—fluid - filled reservoir, acts as a cushion and temperature regulator

Question 12