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 D
Explanation
A. papillary layer of dermis – fingerprints and toeprints
Correct match. The dermal papillae in this layer interlock with the epidermis and form ridges that result in fingerprints and toeprints.
B. stratum basale – most mitotically active layer of epidermis
Correct match. The stratum basale contains basal cells that divide continuously to replenish the upper layers.
C. reticular layer of dermis – arranged in lines of cleavage
Correct match. The dense irregular connective tissue in this layer has collagen fibers oriented in specific directions (cleavage lines), which is clinically important for surgical incisions.
D. epidermis – structural strength of the skin
Incorrect match. The dermis provides the structural strength of the skin due to its collagen and elastic fibers. The epidermis offers protection but does not contribute significant structural strength.
Correct Answer is B
Explanation
A. vitamin A
Vitamin A plays a role in bone remodeling, but excess vitamin A can cause bone fragility. It’s not the first recommendation in cases of brittle bones.
B. vitamin D
Vitamin D helps the body absorb calcium from the digestive tract. A deficiency can lead to osteomalacia (soft bones) or osteoporosis (brittle bones), and also contributes to tooth decay.
C. vitamin C
Vitamin C is needed for collagen synthesis, which is important in bone matrix formation, but deficiency leads to scurvy, not typically brittle bones and teeth loss in this context.
D. vitamin E
Vitamin E is an antioxidant but does not have a primary role in bone or dental health.
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