Following an injury to his arm, a patient complains that he has no sensations from the thumb, index finger, middle finger, and part of the ring finger. You suspect that he has damaged the
A. median nerve.
B. radial nerve.
C. musculocutaneous nerve.
D. ulnar nerve.
E. axillary nerve.
Answer: A
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The Leydig cells of the typical vertebrate testis
A) Produce testosterone. B) Develop into spermatids. C) Produce androgen-binding proteins. D) Mediate the response of the testis to FSH.
A clinician induces contraction of the gastrocnemius and soleus and notices that the foot does not plantar flex as expected. Which of the following would be a logical diagnosis?
A. Peroneal nerve injury B. Ruptured calcaneal tendon C. Anterior compartment syndrome D. Shinsplints E. Lateral plantar nerve injury
Which of the following is not possible?
A) Gas flow equals pressure gradient over resistance. B) Pressure gradient equals gas flow over resistance. C) Resistance equals pressure gradient over gas flow. D) The amount of gas flowing in and out of the alveoli is directly proportional to the difference in pressure or pressure gradient between the external atmosphere and the alveoli.
The Y chromosome codes for a protein called ________, which initiates development of male anatomy.
A. GDX (gender-determining region of the X) B. MIF (mullerian-inhibiting factor) C. TDF (testis-determining factor) D. SRY (sex-determining region of the Y)