7. ______ is the substance which allows the air sacs in the lungs to inflate and keeps the lungs from collapsing and sticking together when deflating
a. prolactin
b. serotonin
c. oxytocin
d. surfactant

8. chromosomal abnormalities cannot be diagnosed during pregnancy.
a. true
b. false

9. dairy products provide calcium which is important for the ______.
a. building of muscle tissue
b. production of blood cells
c. regulation of body fluids
d. balancing of hormones

10. fill in the blanks using the word bank provided below.
______ is needed for ______ healing, teeth and ______ development and ______ processes and can be obtained by ______ a wide variety of fruits and ______.
word bank: bone, metabolic, vitamin c, consuming, vegetables, wound

11. match the following terms to their descriptions.
description | term
uses high - frequency sound waves to form images of the fetus on a computer screen |
checks for human chorionic gonadotropin hormone |
examines the cells shed by the fetus into the surrounding amniotic fluid |
uses a large magnet and radio waves to look at organs and structures inside the body |
terms: amniocentesis, magnetic resonance imaging, serum test, ultrasound

12. the age of the pregnant woman may play a role in the occurrence of genetic errors.
a. true
b. false

13. select all of the following descriptors relating to down syndrome.
is a chromosomal abnormality

Question

7. ______ is the substance which allows the air sacs in the lungs to inflate and keeps the lungs from collapsing and sticking together when deflating
   a. prolactin
   b. serotonin
   c. oxytocin
   d. surfactant

8. chromosomal abnormalities cannot be diagnosed during pregnancy.
   a. true
   b. false

9. dairy products provide calcium which is important for the ______.
   a. building of muscle tissue
   b. production of blood cells
   c. regulation of body fluids
   d. balancing of hormones

10. fill in the blanks using the word bank provided below.
    ______ is needed for ______ healing, teeth and ______ development and ______ processes and can be obtained by ______ a wide variety of fruits and ______.
    word bank: bone, metabolic, vitamin c, consuming, vegetables, wound

11. match the following terms to their descriptions.
    description | term
    uses high - frequency sound waves to form images of the fetus on a computer screen |
    checks for human chorionic gonadotropin hormone |
    examines the cells shed by the fetus into the surrounding amniotic fluid |
    uses a large magnet and radio waves to look at organs and structures inside the body |
    terms: amniocentesis, magnetic resonance imaging, serum test, ultrasound

12. the age of the pregnant woman may play a role in the occurrence of genetic errors.
    a. true
    b. false

13. select all of the following descriptors relating to down syndrome.
    is a chromosomal abnormality

Accepted Answer

### Question 7
# Brief Explanations:
Surfactant is a substance in the lungs that reduces surface tension, allowing air sacs (alveoli) to inflate and preventing them from collapsing/sticking together. Prolactin, serotonin, and oxytocin have other functions (e.g., prolactin in lactation, serotonin in mood, oxytocin in childbirth/ bonding), so they don't relate to lung air sac function.
# Answer:
D. Surfactant

### Question 8
# Brief Explanations:
Chromosomal abnormalities like Down syndrome can be diagnosed during pregnancy via tests like amniocentesis, chorionic villus sampling, or non - invasive prenatal testing. So the statement "Chromosomal abnormalities cannot be diagnosed during pregnancy" is false.
# Answer:
B. False

### Question 9
# Brief Explanations:
Calcium is mainly known for its role in bone and teeth health, but among the options, the regulation of body fluids involves processes like maintaining osmotic balance, and calcium also plays a role in fluid regulation (along with other electrolytes). Muscle tissue building is more related to protein, blood cell production to nutrients like iron and B - vitamins, and hormone balancing is complex with multiple factors. So the best answer is C as calcium helps in regulating body fluids (e.g., in cell signaling, maintaining cell membrane potential which affects fluid movement).
# Answer:
C. Regulation of body fluids

### Question 10
# Brief Explanations:
Vitamin C is needed for wound healing, teeth and bone development, and metabolic processes. It can be obtained by consuming a wide variety of fruits and vegetables. So we fill in the blanks as follows: "Vitamin C is needed for wound healing, teeth and bone development and metabolic processes and can be obtained by consuming a wide variety of fruits and vegetables."
# Answer:
First blank: Vitamin C; Second blank: wound; Third blank: bone; Fourth blank: metabolic; Fifth blank: consuming; Sixth blank: vegetables

### Question 11
# Brief Explanations:
- "Uses high - frequency sound waves to form images of the fetus on a computer screen" matches with Ultrasound.
- "Checks for human chorionic gonadotropin hormone" matches with Serum test (as serum tests can detect hormones in the blood).
- "Examines the cells shed by the fetus into the surrounding amniotic fluid" matches with Amniocentesis (amniocentesis involves taking amniotic fluid to examine fetal cells).
- "Uses a large magnet and radio waves to look at organs and structures inside the body" matches with Magnetic resonance imaging.
# Answer:
| Description | Term |
| --- | --- |
| Uses high - frequency sound waves to form images of the fetus on a computer screen | Ultrasound |
| Checks for human chorionic gonadotropin hormone | Serum test |
| Examines the cells shed by the fetus into the surrounding amniotic fluid | Amniocentesis |
| Uses a large magnet and radio waves to look at organs and structures inside the body | Magnetic resonance imaging |

### Question 12
# Brief Explanations:
As a woman's age (especially advanced maternal age, like 35 and above) increases, the risk of chromosomal abnormalities (genetic errors) in the fetus, such as Down syndrome, also increases. This is because the eggs of older women are more likely to have chromosomal non - disjunction during meiosis. So the statement "The age of the pregnant woman may play a role in the occurrence of genetic errors" is true.
# Answer:
A. True

### Question 13 (partial as per given text)
# Brief Explanations:
Down syndrome is a chromosomal abnormality. Specifically, it is caused by the presence of an extra copy of chromosome 21 (trisomy 21). So "Is a chromosomal abnormality" is a correct descriptor for Down syndrome.
# Answer:
Is a chromosomal abnormality (assuming this is one of the options to select, and it is correct for Down syndrome)

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