The gene that codes for the testis-determining factor (TDF) is found in or on the
Y chromosome
gonadal ridges
X chromosome
fetal testes
The Correct Answer is A
A. Y chromosome: The SRY gene on the Y chromosome codes for the testis-determining factor (TDF), which initiates the development of testes and male characteristics.
B. Gonadal ridges: The gonadal ridges are the precursor structures that develop into gonads but do not contain the gene for TDF.
C. X chromosome: The X chromosome contains genes important for development but does not code for TDF.
D. Fetal testes: The fetal testes produce testosterone but are not the source of the TDF gene.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Ingestion refers to the process of taking in food through the mouth, not the absorption of nutrients into the body's tissues.
B. Digestion involves the breakdown of food into smaller molecules that can be absorbed, but it does not refer to the actual uptake of these nutrients into tissues.
C. Absorption is the process of taking up nutrient molecules into the bloodstream from the digestive tract, which then allows them to be used by the body's tissues.
D. Compaction refers to the process of absorbing water and consolidating indigestible residues into feces, not the absorption of nutrients into tissues.
Correct Answer is B
Explanation
Chylomicrons are indeed secreted from the basal surface of the intestinal absorptive cells (enterocytes) and are absorbed into the lacteals, which are lymphatic vessels in the villi of the small intestine.
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