When an action potential reaches the end of the axon, what happens? a. the sodium ions travel back toward the dendrites. b. the potassium ions travel back toward the cell body. c. the neuron releases chemical messengers (neurotransmitters). d. the neuron takes up chemical messengers (neurotransmitters).

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

The combining form leuk/o means red true or false

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed