Humans and animals need oxygen to survive so oxygen in the atmosphere maintains life on earth for humans and animals to breathe to survive
Answer:
magma is the correct answer
Yep, very slowly but constantly shifting
Neurotransmitters are intracellular messengers that mediate transmission of impulses in the nerve cells whereas hormones regulates the functioning of various body organs. Norepinephrine and epinephrine are both hormones and neurotransmitters since they transmit impulses and at the same time regulate activity of organs in the body.
