The gene that codes for the testis-determining factor (TDF) is found in or on the ________.
A. mesonephros
B. gonadal ridges
C. fetal testes
D. X chromosome
E. Y chromosome
Answer: E
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Which of the following is NOT included in the thoracic cage?
A. Costal cartilages B. Sternum C. Ribs D. Thoracic vertebrae E. All of these are included in the thoracic cage.
Type I diabetes mellitus is caused by ________.
A. a severe hypersecretion of ADH B. a severe hyposecretion of ADH C. the hyposecretion of insulin due to destruction of the beta cells D. a reduction of the insulin receptors on target cells E. a reduction of ADH receptors on the target cells
A bursae is a saclike structure that is filled with:
a. blood b. synovial fluid c. blood plasma d. lymph
There are ________ subtypes of T cells recognized to participate in the immune response.
A. 2 B. 5 C. 3