There is a disorder termed aphasia that interferes with a patient's ability to organize words in the proper way, and as a result, the patient's speech is fluid but nonsensical. What part of the brain is affected by this form of aphasia?
A) Broca's Area
B) Wernike's Area
C) Frontal lobe
D) Precentral gyrus
Answer: B
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The epithelial tissue root sheath is the ________ layer of the concentric layers making up the hair follicle wall; it derives from the ________.
A. outer; epidermis B. outer; dermis C. inner; epidermis D. inner; dermis
Which of the following is not true of cholesterol?
A. LDLs are molecules that transport cholesterol to the tissues for use by the cells. B. A cholesterol level of greater than 200 mg/dl is associated with an increase in the likelihood of developing cardiovascular disease. C. For the best health, it is recommended that the LDL and HDL levels in the blood should be as low as possible. D. HDLs are molecules that are transported to the liver for decomposition and removal from the body. E. All of these are true of cholesterol.
Water has the ability to dissolve polar covalent molecules like sucrose by
A) forming hydration spheres around the molecule. B) pulling atoms out of the molecule and into solution. C) creating crystals of positively and negatively charged atoms. D) taking electrons from the polar covalent molecule. E) ionization.
Some proteins, like hemoglobin or antibody molecules, require multiple polypeptide chains to come together to act as a single protein. If the association among the different polypeptide chains is blocked, the ________ structure of the protein is destroyed.
A) primary B) secondary C) tertiary D) quaternary E) binary