When heart valves do not close fully and a turbulence is created within the heart, this can be heard using a stethoscope and is known as
A. a lub dub.
B. atherosclerosis.
C. a heart murmur.
D. a major heart defect.
Ans: C. a heart murmur.
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Ball-and-socket joints allow flexion, extension, rotation, abduction (moving away from the midline of the body) and adduction (moving toward the midline). Which of the following is(are) an example of a ball and socket joint?
A. the knee B. the elbow C. the hip D. the joints between bones of the fingers
The investigation of the movement of proteins and lipids to their appropriate location within a cell is known as ________.
Fill in the blank(s) with the appropriate word(s).
Which is a property of unsaturated fats?
a. They are more common in animals. b. They are generally liquid at room temperature. c. They have no double bonds in the carbon chains of their fatty acids. d. They have fewer fatty acids per fat molecule than do saturated fats. e. They contain more hydrogen than do saturated fats having the same number of carbon atoms.
Which of the following is being used to replace hypochlorites in treating water because of the possibility of cancer-causing substances being produced?
A. chloramines B. fluorine C. sodium iodide D. quaternary ammonium compounds E. hydrogen peroxide