Hormonal and neural changes during pregnancy function to facilitate diffusion of gases across the placenta. One way this occurs is by respiration rate, thereby CO 2 levels in the blood.

Models are non-visual ways of coummincating how someone thinks about something in the natural world

Immature bone cells, or osteoblasts, manufacture a protein called osteoid as well as several hormones. because of this, we would expect osteoblasts to contain numerous a) nuclei. b) ribosomes. c) lysosomes. d) golgi bodies.

Some substances but not other can cross the (blank) membrane of a cell