Following a head injury, a young woman frequently loses her temper and is often depressed and otherwise "moody." What part of the brain do you think has been damaged?
A. Claustrum
B. Caudate nucleus
C. Putamen
D. Amygdaloid body
E. Globus pallidus
Answer: D
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In which situation would an injected drug be the most effective agonist for an endogenous chemical messenger?
A. The drug has a lower affinity for the messenger's receptors than the messenger does. B. The drug achieves 50% saturation of the messenger's receptors at a lower concentration than that required by the messenger. C. The drug binds to an alternate binding site on the protein receptor and reduces its affinity for the endogenous chemical messenger. D. The drug does not couple to the binding site of the messenger's receptor.
Identify the incorrect statement about a single motor unit
A) The more neurons involved, the more powerful the contraction. B) The smaller the number of muscle fibers, the more precise the movement. C) Fine motor skills depend on the development of small motor units. D) Some motor units include as many as 2000 muscle fibers. E) Muscle fibers of one motor unit intermingle with the fibers of another motor unit.
In the body, the ________________________________________, also known as the inguinal area, is the lower region of the abdomen adjacent to the thigh
Fill in the blank(s) with correct word
Which long bone structure is correctly matched with its description or function?
a. epiphysis; the end of a bone that is composed of compact bone only b. articular cartilage; fibrocartilage located at the ends of a bone c. periosteum; responsible for growth in bone width d. perforating fibers; blood vessels that penetrate the bone.