Answer:
C) relaxation of the internal urethal sphincter
Explanation:
The muscles that control micturition are controlled by the autonomic and somatic nervous systems.
Micturition is inhibited (storage phase, when bladder is at low volume) when internal urethral sphincter are contracted and the detrusor muscle relaxed by sympathetic stimulation. During micturition, parasympathetic stimulation leads to the detrusor muscle contraction and the internal urethral sphincter relaxation. The external urethral sphincter is under somatic control and is consciously relaxed during micturition.
Answer:
B - earthquakes
Explanation:
the movement in the earth' plates causes earthquake.
Answer:
Cranial capacity increased the most from 2 million years ago to the present.
Explanation:
The rate of change is greatest between 2 million years ago and the present.