Which of the following lipids are used as starting points in the making of hormones?
a. phospholipids
b. cholesterol
c. triglycerides
d. both B and C above
b. cholesterol
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A depolarizing graded potential
a) makes the membrane more polarized. b) makes the membrane less polarized. c) is considered a type of action potential. d) is the last part of an action potential. e) is seen when the cell approaches threshold.
If you were able to sort nucleotides into DNA nucleotides and RNA nucleotides, which component of the nucleotide would you use to do so?
A. Pentose sugar B. Nitrogenous bases C. Phosphate group
Which statement about precapillary sphincters is CORRECT?
A. They are openings that allow large molecules and blood cells to leave the capillary. B. They are voluntary. C. They can close off the capillaries by contracting. D. They contract when oxygen levels in the tissue are low. E. When the precapillary sphincters are open, blood flows only through the thoroughfare channels.
The skeletal framework of the neck consists of:
a. lumbar vertebrae b. thoracic vertebrae c. sacral vertebrae d. cervical vertebrae