Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines - epinephrine and norepinephrine) to accelerate the heart rate. The parasympathetic nervous system (PNS) releases the hormone acetylcholine to slow the heart rate. Such factors as stress, caffeine, and excitement may temporarily accelerate your heart rate, while meditating or taking slow, deep breaths may help to slow your heart rate.
Answer:
i think it's A. why? because bumblebees pollinate flowers making more grow but dragonflies EAT the bees so they'll decrease.
<span>Climax community=when the ecosystem reaches its mature state. After every disturbance, the ecological succession will culminate in the climax community. For example, ecological succession triggered by fires in Yellowstone Park culminates in pine forests. Pioneer species are the first species to colonize an area after a disturbance occurs. They reproduce quickly and survive in harsh conditions. For example, lichens.</span>
Answer:
Urinary bladder - superior mesenteric ganglion
Explanation:
The inferior mesenteric ganglion is located in the center of the abdomen where the inferior mesenteric artery begins. The axons of postganglionic neurons extend through the hypogastric plexus. These neurons then innervate the blood vessels of several organs like the rectum, urinary bladder, and distal colon, etc.
The postganglionic neurons from superior mesenteric ganglion innervate the blood vessels of the small intestine and proximal colon.
