Which blood vessel transports oxygenated blood from the lungs to the left atrium?

What are some things that limit population growth?

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?