The Y chromosome codes for a protein called __________, which initiates development of male anatomy.
A. SRY (sex-determining region of the Y)
B. MIF (mullerian-inhibiting factor)
C. GDX (gender-determining region of the X)
D. TDF (testis-determining factor)
D. TDF (testis-determining factor)
You might also like to view...
Which of the following is a potentially fatal condition that involves infection of the meninges?
A. Polio B. Myasthenia gravis C. Meningitis D. Peripheral neuropathy
An erection of the penis is caused by
A. increased secretions of lymph into the spongy tissue. B. muscle flexion of the penile muscles. C. blood filling the erectile bodies and compressing the veins. D. semen pressure from the testes and ductus deferens. E. ejaculatory muscles.
Arrange the following events detailing the visual pathway in correct sequence:(1) Retinal cells generate action potential(2) Person becomes aware of the information obtained by CNS(3) Visual cortex translates action potential(4) Bright light is shone into the eye(5) Optic nerve conducts action potential to CNS
A. 4, 5, 1, 3, 2 B. 4, 2, 1, 5, 3 C. 4, 1, 5, 3, 2 D. 4, 1, 2, 3, 5 E. 4, 3, 5, 2, 1
The activated lymphocytes must make thousands of copies of themselves in order to fight off the thousands of pathogens reproducing in the body. This reproduction of lymphocytes is called ________
A) Immunization B) Differentiation C) Lymphocyte proliferation D) Lymphocyte activation