1. Of the following structures, which would be located in the mediastinum? a. Occipital lobe b. Aorta c. Left carotid artery d. Pancreas The mediastinum is the central area of the thoracic cavity. It includes the heart, trachea, esophagus, thymus and other parts of the central chest. The aorta is the main artery of the circulatory system and starts at the top left ventricle of the heart. The occipital lobe is in the brain, the left carotid artery is in the neck, and the pancreas is in the abdomen. 2. The point at which an impulse is transmitted from one neuron to another is: a. Nerve center b. Synapse c. Dendrite d. Terminal plate The synapse would be considered the point at which an impulse is transmitted from one neuron to another. This is a small gap that exists between the neurons. The nerve center is where there is a group of nerves connected to each other. The neuron consists of projections referred to as axons and dendrites. The dendrite works by bringing information to the neuron. The axons take information away from the neuron. At the terminal plate is where an impulse travels from the neuron to the muscle. 3. Which of the following terms is spelled incorrectly? a. Bacterial b. Bacteriolagy c. Bacteriocidal d. Bacterium Bacteriolagy is spelled incorrectly. It should be bacteriology instead. Bacterial, bacteriocidal, and bacterium are spelled correctly. 4. In a human, urine flows through the urinary system in which order? a. Bladder, urethra, kidney, urethral meatus, ureter b. Bladder, kidney, ureter, urethra, urethral meatus c. Kidney, ureter, bladder, urethra, urethral meatus d. Urethra, bladder, ureter, kidney, urethral meatus In a human, the urine flows through the kidneys, ureter, bladder, urethra, and urethra meatus. Remember, the urine is formed in