Question

After sympathetic stimulation, which type of activities are not present in a human being?
A. Tachycardia
B. Bronchodilation
C. Micturition
D. Semen ejaculation

Answer 1

Hint: Sympathetic stimulation plays a role in the urinary storage, but as far as micturition is concerned, it is a function of a parasympathetic system.
The sympathetic nervous system's primary process is to stimulate the body's fight or flight response. The sympathetic systema nervosum is described as being antagonistic to the parasympathetic systema nervosum which plays a primary role in the stimulation of the body to "feed and breed" and to (then) "rest-and-digest".

Complete answer:
The sympathetic systema nervosum directs the body's rapid involuntary response to dangerous or stressful situations. A flash flood of hormones boosts the body's alertness and pulse, sending extra blood to the muscles. Relaxation of the detrusor muscle of the bladder is required for the urine storage, and simultaneous contraction of both the interior (IUS) and external (EUS) urethral sphincters. The bladder and IUS are primarily under the control of the sympathetic systema nervosum. The EUS is under the control of the somatic systema nervosum The autonomic and somatic nervous systems, further controls the muscles controlling micturition, these nervous systems open the 2 sphincters during the voiding phase of micturition. During the storage phase the interior musculus sphincter urethrae is tense and therefore the detrusor muscle is relaxed by sympathetic stimulation.

So, the correct answer is option C.

Additional information: Control of parasympathetic activities is done by the hypothalamus of brain as it acts as central control of the autonomic systema nervosum , and therefore the paraventricular nucleus is that the key hypothalamic site for this control.

Note:
When the bladder is filled with urine, stretch receptors within the bladder wall trigger the reflex . The detrusor muscle that surrounds the bladder contracts. the interior musculus sphincter urethrae relaxes, allowing urine to pass out of the bladder into the urethra. Both of those reactions are involuntary.