Which of the following statements about the bulbo-urethral glands is true?
a. they contribute less than 5 percent of the semen volume
b. they secrete an alkaline mucus to neutralize any urinary acids in the urethra
c. they are located at the base of the penis
d. all of the above
Answer: d. all of the above
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Mendelian inheritance specifies that if two heterozygous individuals mate, the chances that a child would be homozygous for the recessive allele would be
A. 25%. B. 50%. C. 75%. D. impossible to predict.
How would a decrease in the number of megakaryocytes affect blood composition?
A. A decrease in megakaryocytes would decrease the number of platelets in the blood. B. A decrease in the number of megakaryocytes would decrease the number of leukocytes in the blood. C. A decrease in the number of megakaryocytes would decrease the number of immunoglobulins in the blood. D. A decrease in the number of megakaryocytes would decrease the number of fibrinogens in the blood.
A 62-year-old woman is admitted to the hospital with fever and pneumonia. How does her clinical status influence her O2 dissociation curve?
A. shift to the left B. shift to the right C. no change D. downward shift E. upward shift
Which of the following statements concerning structures of the diencephalon is false?
A. The third ventricle separates the two large portions of the thalamus. B. The thalamus projects sensory information to the cerebral cortex. C. The subthalamic nuclei are associated with the basal nuclei. D. The thalamus controls many endocrine functions. E. The pineal body may play a role in controlling the onset of puberty.