What is the difference between a hypothesis and a theory?
A. A hypothesis is based on observation of a single event. A theory
has been verified by many observations by many scientists,
B. A hypothesis is a description of events, but a theory explains why
the events took place,
C. A hypothesis has been tested, but a theory cannot be tested,
D. A theory is a possible explanation of a natural event that has not
been tested. A hypothesis is a question that cannot be answered
through scientific methods.
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I think the answer is A. because I remember doing it when we were still in school I chose A. and I got a 100%.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d