Which part of the inner ear houses receptors for angular (rotational) movement of the head?

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?