In mammalian males, the reproductive and excretory systems share the same urethra.
a. true
b. false
Answer: a. true
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Which characteristic is relevant to the endocrine system but not to the nervous system?
a. Releases chemicals into synaptic clefts. b. Chemical signals operate at short distances. c. Speed of response is very rapid. d. Released chemicals may target cells far away. e. Anatomically a "wired" system.
When do the accessory respiratory muscles become active?
A. The muscles of expiration are the abdominal and diaphragm muscles. B. The muscles of expiration are the abdominal and internal intercostals muscles. C. The muscles of expiration are the external and internal intercostals muscles. D. Exhalation is a passive process and does not require the action of any muscles
Normal passage of blood from the atria to the ventricles only happens if the atrioventricular valves are open.
Answer the following statement true (T) or false (F)
The arrow in the figure is pointing to which of the following structures? SEE A&P Photo
articular cartilage a secondary ossification center the epiphyseal plate a primary ossification center