Which one of these is NOT an example of intercellular communication? A. Electrical signals pass between heart cells

B. Chemical messengers doc on two receptors of adrenal gland

C. A vessel and encloses over a nutrient molecule

D. Chemical signals from pituitary gland to adrenal gland

Apart of the periodic table is shown. a portion of the sixteenth and seventeenth columns of the periodic table is shown. column 16 reads eight oxygen, 16 sulfur, and 34 selenium. column 17 reads nine flourine, 17 chlorine, and 35 bromine. which of the following elements is less reactive than the others? bromine (br) oxygen (o) selenium (se) sulfur (s)

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger