Which one of the following is characteristic of an exocrine gland but NOT of an endocrine gland?
A) produces hormones
B) can generate and transmit nerve impulses
C) releases its products into a duct
D) releases gland products into the blood
E) is composed entirely of connective tissue
C
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Researchers suggest that despite the trend observed, the depletion of oxygen from the atmosphere due to burning of fossil fuels is currently not a serious environmental concern
because the change in oxygen levels is small compared to the abundance of atmospheric oxygen, which is sufficient for survival of animals and humans. True or false. Severe declines in ocean plants (phytoplankton) due to ocean warming and acidification from dissolved CO2 (forming HCO3 - and CO3 2-) could potentially lead to larger decreases in O2 levels over time, thereby altering this conclusion. What will be an ideal response?
An elephant has a higher total resting metabolic rate than a mouse
A. true B. false
________ may destroy infected body cells
A) Phagocytic cells B) Helper T cells C) Natural killer cells D) Cytotoxic T cells
Which of the following characteristics of water is most responsible for the sinking of the Titanic?
A. The temperature of liquid water rises and falls slowly. B. Water is liquid at room temperature. C. Frozen water is less dense than liquid water. D. Water molecules are cohesive. E. Water has a high heat of vaporization.