Using the theories of nervous system, we got it is true that inhibition of the sympathetic nervous system inhibits urination primarily by inhibiting the detrusor muscle.
Nervous system involves large number of mechanisms at the same time.
The parasympathetic nervous system stimulates the detrusor muscles to contract, causing the person to urinate. This sympathetic nervous system stimulates the contraction of the internal urethral sphincter, causing the person to hold the urine. Somatic efferent neurons stimulate contraction of the external urethral sphincter, which is the skeletal muscle.
Hence, inhibition of the sympathetic nervous system inhibits urination primarily by inhibiting the detrusor muscle is true.
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<span>a. Acoelomates. Flatworm is a type of acoelomate animal; they have no body cavity or ceolom but they have </span>mesenchyme in their body cavity that surrounds the gut and organs in one solid body.
It would most likely be A. 10grams considering grams is the smallest and we are talking about a feather.
<span>The Cambrian. The Cambrian Explosion, which began roughly 545 million years ago, was a relatively rapid (~5-10 million years) diversification of multicellular life, including most of the animal phyla currently extant today. This was an evolutionary arms race of sorts, with many creatures achieving both larger size as well as symmetrical bodies and various structural supports, including skeletal systems. It was also a highly experimental times in terms of evolution, as many forms of creatures arose and went extinct in rapid succession during this period.</span>
