Irene has inherited the gene for male pattern baldness. What other factor (condition) must she have to express the gene?
she must wear hats a lot
she must produce enough testosterone
she must dye her hair
she must produce enough estrogen and progesterone
The Correct Answer is B
A. she must wear hats a lot
Wearing hats has no scientific link to causing or expressing genetic baldness.
B. she must produce enough testosterone
Male pattern baldness is an androgen-dependent trait, meaning that even if a woman inherits the gene, it requires the presence of testosterone (or dihydrotestosterone, DHT) to be expressed. Elevated androgen levels in women (e.g., in PCOS) may trigger expression.
C. she must dye her hair
Hair dye affects only the external hair shaft and has no genetic or hormonal influence on baldness.
D. she must produce enough estrogen and progesterone
Estrogen and progesterone actually have protective effects on hair. Decreased levels of these hormones (e.g., after menopause) may unmask androgenic effects, but they do not directly cause male pattern baldness expression.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. axon
The axon transmits signals away from the neuron’s cell body toward other cells. Blocking it would prevent output, not input.
B. dendrite
Dendrites receive input from other neurons. Blocking dendrites would prevent the neuron from receiving synaptic signals.
C. synapse
The synapse is the junction between neurons. While blocking the synapse can prevent transmission, the question specifies receiving input, which happens at the dendrites.
D. synaptic cleft
This is the small gap between neurons where neurotransmitters are released. Blocking it affects signal transmission but not specifically the receiving end, which is the dendrite.
Correct Answer is B
Explanation
A. endochondral growth
Endochondral ossification is the process of bone formation from cartilage, not cartilage growth itself.
B. interstitial growth
Interstitial growth occurs within the cartilage as chondrocytes divide and secrete matrix, expanding the tissue from the inside.
C. appositional growth
Appositional growth occurs when new layers are added to the surface of cartilage or bone by cells in the perichondrium or periosteum.
D. intramembranous growth
Intramembranous ossification is a bone formation process, where bone develops directly from mesenchyme, not a method of cartilage growth.
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