Which statement is correct about the trophoblast?
a. It becomes the fetus.
b. It is responsible for accomplishing implantation.
c. It is destined to become the fetal portion of the placenta.
d. Both a and b
e. Both b and c
E
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Which is not considered to be a change associated with aging in males?
A. Prostate enlargement B. Impotence C. Erectile dysfunction D. Decreased testosterone levels E. Termination of spermatogenesis
Which statement is true regarding cerebrospinal fluid?
A) CSF is identical in composition to blood plasma. B) CSF is made during fetal development and does not change through the lifetime of the person. C) There is about a liter of CSF within the brain and spinal cord. D) If CSF is not properly resorbed, the result would be hydrocephalus. E) CSF moves back into the blood supply by the process of osmosis.
The skull of a newborn often appears to be deformed, but after a short period of time, the skull assumes normal shape. What happened during the birth process and why did this change occur?
What will be an ideal response?
During inspiration, the volume of the lungs ________
A) remains the same B) decreases C) increases