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 C
Explanation
A. edema
Edema involves fluid accumulation and can contribute to swelling and immune cell movement, but it does not directly wall off the injury site.
B. vasodilation of blood vessels
Vasodilation increases blood flow to bring immune cells and nutrients, but does not physically isolate the injury.
C. formation of a clot
A blood clot forms a physical barrier that helps prevent the spread of pathogens and walls off the injury.
D. all of the above
While A and B support inflammation and healing, only C directly achieves the goal of physically walling off the injured area. Therefore, "all of the above" is in
Correct Answer is A
Explanation
A. occurs constantly during a person's lifetime
Bone is a dynamic tissue. Remodeling occurs throughout life to adapt to stress, repair microfractures, and regulate calcium levels.
B. is involved in Na⁺ regulation
Bone remodeling primarily involves calcium and phosphate regulation, not sodium.
C. only occurs after a bone has been broken and is healing
Remodeling happens continuously, not just after fractures. Healing is one scenario, but it's not exclusive.
D. does not occur when bones adjust to particular stresses
False. One of the main purposes of remodeling is to adapt to mechanical stress (e.g., weightlifting increases bone density).
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