Which of the following is the last step that produces an inspiration?
a. the atmospheric pressure becomes lower than the intrapleural pressure.
b. the diaphragm contracts.
c. the intercostal muscles contract.
d. the intra-alveolar pressure becomes lower than the atmospheric pressure.
e. the intrapleural pressure becomes positive.
D
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The cells that are formed during spermatogenesis by meiosis I are called
A) spermatogonia. B) primary spermatocytes. C) secondary spermatocytes. D) spermatids. E) sperm.
Define karyotype
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A circulatory route that has two sets of capillaries is known as a ________.
Fill in the blank(s) with the appropriate word(s).
A blockage in the colon where the ascending colon turns to become the transverse colon would occur at the ________.
A. cardiac sphincter B. gastric flexure C. ileocecal valve D. hepatic flexure E. splenic flexure