Mitochondria
A. contains DNA.
B. have inner and outer membranes.
C. have inner folds called cristae.
D. are the cell's power plants.
E. All of these choices are correct.
E
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Examine the sequence of images below. These show a total hip replacement. Why is this arthroplastic procedure considered a total replacement, and not partial?
1 the head of the femur is completely replaced by a prosthesis 2 the acetabulum is replaced by an artificial acetabulum 3 part of the shaft of the femur is replaced A: 1 only B: 2 only C: 3 only D: both 1 and 2 E: both 1 and 3
All of the following will help the skin to fight infection but one. Which of the following will have little effect on the skin's ability to fight infection?
A) Increased secretions of defensins from skin cells. B) Greater production of keratinocytes resulting in more layers of the stratum corneum. C) More tight junctions between keratinocytes of the stratum corneum. D) Greater production of melanin.
Excess potassium ions are eliminated from the body by the
A) digestive system. B) spleen. C) sweat glands. D) liver. E) kidneys.
The thalamus receives information from all of the following senses EXCEPT for:
A) taste. B) vision. C) smell. D) hearing.