Which substances are secreted at the endings of nerve cells in order to carry a chemical message across the synapse? a) lipids b) neurotransmitters c) antigens d) antibodies

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition. b) one-fourth of the daughters of an affected man would have this condition. c) one-half of the daughters of an affected father and a carrier mother could have this condition. d) only if a woman is xxx could she have this condition.

If your blood becomes too concentrated with iona, what will happen to the red blood cells

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?