The area from which a female rodent urinates is called the _______________
Fill in the blank(s) with correct word
urethra
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All neurotransmitters excite the receiving cell to cause an action potential.
Answer the following statement true (T) or false (F)
How does the heater organ of a swordfish produce heat?
A) The muscle contracts very rapidly, producing large quantities of heat. B) The myosin binds very weakly to the actin, utilizing large amounts of ATP that ultimately produces heat, but no tension. C) The sarcoplasmic reticulum releases and recovers large amounts of Ca2+, releasing heat as a by-product of these processes. D) The muscle fibers are rapidly generated and degraded, which produces large quantities of heat as a by-product.
Which of the following is true of the structures of the sympathetic chain?
A) About 8 percent of the axons of each spinal nerve are parasympathetic postganglionic fibers. B) Each chain contains about 3 cervical, 11 thoracic, 4 lumbar, and 4 sacral sympathetic ganglia. C) Preganglionic sympathetic neurons are located in the cervical and thoracic regions only. D) These nerves have white rami, but lack gray rami. E) None of the answers are correct.
In addition to its effects on kidney tubules, aldosterone affects salt and water absorption in the small intestine.
Answer the following statement true (T) or false (F)