In the nucleus, DNA is wrapped with proteins. This complex is called
A. chromatin.
B. DNA particles.
C. nucleoli.
D. a DNA wrap.
E. cytoplasmic organelles.
A
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Which of the following responses is NOT caused by activation of the sympathetic division?
a) Increased heart rate b) Airway constriction c) Decreased blood flow to kidneys and gastrointestinal tract d) Increased blood flow to skeletal muscle, cardiac muscle, liver and fat e) Increased blood glucose level
Cell membranes contain about one-half ________________________________________ and one-half ________________________________________
Fill in the blank(s) with correct word
The thoracic organs are drained mainly by:
What will be an ideal response?
Which of the following is true regarding normal quiet expiration of air?
A) It depends on the complete lack of surface tension on the alveolar wall. B) It is a passive process that depends on the recoil of elastic fibers that were stretched during inspiration. C) It requires contraction of abdominal wall muscles. D) It is driven by increased blood CO2 levels.