Describe the role of the reticular activating system in cortical arousal and stimulation
What will be an ideal response
The reticular activating system (RAS) appears to mediate the alertness state of the cerebral cortex. The thalamus, hypothalamus, and other areas such as the brain stem appear to be interconnected with the RAS. The hypothalamus seems to be the structure responsible for the actual timing of the sleep-wake cycle. The primary neurotransmitter involved is serotonin.
You might also like to view...
When a reversible chemical reaction is at equilibrium,
A. catalysts no longer influence either the forward or reverse reaction rates. B. the concentration of the reactants is equal to the concentration of the products. C. the rate of the reaction in one direction is equal to the rate in the reverse direction. D. both the forward and reverse reactions stop occurring. E. the supply of reactants has become exhausted, so the forward reaction ceases and the rate of the reverse reaction increases.
The steps in the process of endochondral ossification are
a: Ossification center forms in the diaphysis. b: Cartilage calcifies and a bone collar forms. c: Ossification centers form in the epiphyses. d: Bone replaces cartilage. e: Epiphyseal plates ossify. f: Cartilage model develops. The correct chronological order for these steps is A. f. - b. - c. - d. - a. - e. B. b. - c. - f. - a. - e. - d. C. a. - c. - b. - d. - e. - f. D. f. - b. - a. - c. - d. - e. E. a. - e. - c. - d. - b. - f.
Which of the following is NOT a function of membrane proteins?
A. Transport B. Receptors C. Energy production D. Structural support
What do all hormones have in common?
A. They are made from amino acids. B. They are all lipid-soluble. C. They use the second messenger mechanism to control the target cell. D. They bind to and interact with a receptor on or in the target cell. E. They are bound to transport molecules in the blood.