Which of the following is true of spongy bone?
A. Lamellae are arranged in concentric circles in osteons.
B. Nourishment is supplied through a central canal.
C. Bone is arranged in plates called trabeculae.
D. Arrangement of the bony plates is completely random.
E. The spaces are filled with yellow marrow.
C. Bone is arranged in plates called trabeculae.
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__________ is the ability to generate and maintain elevated body temperatures
Fill in the blank with the correct word.
When vasodilation of the blood vessels in the skin occurs,
a. the skin temperature becomes warmer than the core temperature. b. the insulative capacity of the skin is increased. c. heat will be lost from the body if the air temperature is cooler than the skin temperature. d. both (b) and (c) above. e. all of these answers.
Fingerprints and footprints in the epidermis are created by dermal papillae present in the ________
A) reticular layer of the dermis B) subcutaneous tissue C) stratum lucidum D) hypodermis E) papillary layer of the dermis
What makes an isotope radioactive?
A. It releases energy to become stable. B. It releases hydrogen ions into solution. C. It breaks down into hydrogen and electrons. D. It has more protons than electrons.