Lipids
A. function as enzymes.
B. can insulate and help prevent heat loss.
C. are all water soluble.
D. comprise the genetic material of cells.
E. yield little energy per unit of weight.
Answer: B
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Which of the following factors influence cell membrane permeability?
A. Phospholipid composition of the membrane B. Ionic charge along the membrane C. Presence or absence of transport proteins D. Molecule size E. All of the choices are correct.
Tidal ventilation is
A) When the ventilatory medium moves in and out of the respiratory chamber. B) Bulk flow of water across the respiratory surfaces of cnidarians. C) The movement of water over the gills in most fish. D) When the partial pressure of oxygen in the medium is variable in a diurnal rhythm.
Why is oxygen so much more critical to the heart muscle than to skeletal muscles?
What will be an ideal response
Which gland does NOT produce reproductive hormones?
A. Thyroid B. Ovaries C. Testes D. Pituitary gland E. Placenta