Answer to Question 1
B
The neurotransmitters' complex and elusive integration of these responses within the central nervous system relies on communication among the cerebral cortex, limbic system, thalamus, hypothalamus, pituitary gland, and the reticular activating system. Whereas the cortex is involved with cognition, attention, and alertness, emotional responses to stress are located in the limbic system.
Answer to Question 2
A
Proteins are the basis for lean body mass and are important for chemical reactions, transportation of other substances, preservation of immune function, and maintenance of osmotic pressure (albumin) and blood neutrality (buffers) in the body. Carbohydrates help with maintaining osmotic pressure, gluconeogenesis, and providing minerals to the body. Lipids provide source of energy.