Urine dripping from a renal pyramid passes first into the major calyx then into the minor calyx.
a. true
b. false
Answer: b. false
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Under quiet conditions, blood returning to the heart retains about ________ of its oxygen content
A) 25 percent B) 50 percent C) 75 percent D) 90 percent E) 100 percent
The blood vessels in the cardiovascular system are subdivided into three circuits known as the __________.
a. pulmonary, systemic, and arterial circuits b. lymphatic, pulmonary, and systemic circuits c. pulmonary, venous, and systemic circuits d. coronary, pulmonary, and systemic circuits
Which of the following is the correct pathway of sperm cells from their formation to ejaculation?
A. Seminiferous tubule, epididymis, rete testis, ductus deferens, ejaculatory duct, urethra B. Seminiferous tubule, rete testis, epididymis, ductus deferens, ejaculatory duct, urethra C. Seminiferous tubule, epididymis, rete testis, urethra, ejaculatory duct, ductus deferens D. Seminiferous tubule, rete testis, epididymis, ejaculatory duct, urethra, ductus deferens E. Seminiferous tubule, epididymis, rete testis, ejaculatory duct, ductus deferens, urethra
Hydrocephaly is a condition whereby cerebrospinal fluid accumulates around the brain. Which supportive cells continue CSF production despite it backing up in the subarachnoid space?
A. Oligodendrocytes B. Macrophages C. Ependymal cells D. Astrocytes E. Microglia