Sympathetic nerve fibers trigger the secretion of nitric oxide, which dilates the deep arteries allowing blood to engorge the penis
Indicate whether the statement is true or false
FALSE
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Which of the following statements about light detection is TRUE?
a. Light detection is synonymous with vision. b. Light detection is always initiated in a rod or cone photoreceptor, though these need not be located in an eye. c. Even in its most primitive form, light detection evolved in structures dedicated to this purpose. d. Light detection evolved numerous times in a variety of structures. e. None of these.
During exercise, ventilation initially increases due to
A. abrupt changes in metabolism or blood gases. B. limb movements that stimulate the respiratory center. C. increased blood CO2 levels, stimulating baroreceptors. D. decreased blood O2 levels, stimulating chemoreceptors. E. decreased blood pH levels, stimulating baroreceptors.
The ________ veins drain the kidneys.
A. suprarenal B. renal C. testicular D. ovarian E. mesenteric
The guarding reflex allows the urinary bladder to fill by ________.
A. stimulating sympathetic nerves to the external urethral sphincter to contract B. responding to stretch receptors in the bladder wall C. inhibiting parasympathetic stimulation of the detrusor muscle D. All of the choices are correct.