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:
sexually, 4, egg, sperm, fertilization.
Explanation:
Follow the order I put the words into the order of the blanks.
Answer:
Habitat is the natural home or environment of an animal, plant or other organism.
I think fungi and bacterial cell both have nucleus which can be seen under microscope