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☆☆☆☆☆The endocrine system affects cells with certain receptors .
The nervous system can affect only nearby cells
It sends messages that control all the systems in the body.
The nervous system controls almost every action in the human body. It controls the heart beat, your adrenaline levels, and many other things which can effect an organism.
viruses are not alive. APEX
There must be genetic variation in the population
The system must not be in hardy-weinberg equilibrium.
resources must be limited in the ecosystem
The endocrine system sends messages using hormones. It delivers messages from the nervous system to the excretory system. It tells the excretory system when the blood is out of balance.
Sympathetic and parasympathetic nervous systems apex
Experimental subjects are left free for manipulation
The answer to the question is the pyloric sphincter. The pyloric sphincter is the part of the digestive system that precedes the small intestine.Ê
A sperm or egg
