Anatomy & Physiology I BSC2085C Study Guide Answers - Week 4 Final Exam
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Anatomy & Physiology I BSC2085C Study Guide Answers - Week 4 Final Exam/Anatomy & Physiology I BSC2085C Study Guide Answers - Week 4 Final Exam/Anatomy & Physiology I BSC2085C Study Guide Answers - Week 4 Final Exam/Anatomy & Physiology I BSC2085C Study Guide Answers - Week 4 Final Exam
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Anatomy & Physiology I
BSC2085C Study Guide Answers -
Week 4 Final Exam
Week 4 – Chapters 27, 28 and 29
Section 1
1. What is considered to be a normal sperm count per mL of semen for human males? 50 – 120
million sperm/mL semen
2. This disc-shaped organ will serve to nourish (feed) the fetus and it is attached to the uterine wall.
The placenta
3. If an infant is born with this disorder, noted in its urine, he/she will be unable to produce
an important amino acid for the formation of melanin, epinephrine, norepinephrine, etc.
Phenylketonuria
4. What sperm count will typically be associated with infertility? 20 – 25 million
sperm/mL semen
5. In order to penetrate the egg, a spermatozoon must secrete enzymes from this
specific structure. Acrosome
6. What is a teratogen and what will it most likely cause? A virus, chemical or other agent
that is capable of causing anatomical deformities in the fetus. It will most likely cause limb
abnormalities.
7. How long after an egg is released (ovulation) does that egg have to be fertilized before
it dies? Within 12 - 24 hours
8. What is the actual definition of an egg or ovum? Any presentation or stage of the
primary oocyte to the fertilized egg
9. A male has this erectile tissue in the penis, but the female does NOT have it her
counterpart, the clitoris. The corpus spongiosum
10. When does the developing individual become a “fetus”? At the end of 8 days of
gestation (pregnancy)
11. If we see an XXY combination of sex chromosome, in other words a sterile male with
underdeveloped testes, overdeveloped breast and long arms, what syndrome are we looking
at with this? Klinefelter syndrome
, 12. What term do we use for a change in genetic composition of a particular population over
a period of time? Evolution
13. Name the “cheesy sebaceous” secretion covering the fetus around month 5 of pregnancy.
Vermix caseosa
14. What is the term we use for the development of female breasts at puberty? Thelarche
15. Which artery in the male penis when dilated is responsible for penile erection? Deep artery
16. Semen contains this hormone-like substance that may actually stimulate contractions of
the female reproductive tract. Prostaglandins
17. What is the specific genetic cause of Trisomy – 21, Down’s Syndrome? Nondisjunction
18. During the birthing process or immediately after birth, what is it exactly that stimulates
the infant to start breathing? The accumulation of CO2 in the blood.
19. Estrogen is responsible for bringing on all the following in adolescent girls: breast
growth, vaginal metaplasia, endometrial mitosis and fat deposition. Does it have anything to
do with the growth of pubic and axillary hair? No
20. Initially, this structure provides the main source of major hormones that regulate
pregnancy, eventually it is done by the placenta. The corpus luteum
21. Where does fertilization of the ovum most typically occur? In the uterine/fallopian tube.
22. Where does implantation of the fertilized ovum, typically occur? The body of the uterus
23. The portion of the penis make up half of its structure and is internal therefore it cannot
be seen. The root
24. The blood disorder known as Hemophilia is caused by a sex-linked recessive allele.
What does this mean? It means the son who has this disorder gets the inherited allele
from his mother
Section 2
25. One of the functions of the hypothalamus is to link the nervous system with the
endocrine system. What effect will high levels of testosterone have the hypothalamus? It will
inhibit its function
26. The milk produced by the human female has many advantages, nutritionally, over
cow’s milk, however, it does not have more of this specific nutrient. Protein
27. A birth defect that affects the penis results from the urethral opening on the side of
the penis. What is this defect called? Hypospadias
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