The triceps brachii helps the pectoralis major flex the arm. In this example the triceps is which of the following?
A. An antagonist
B. A fixator
C. A synergist
D. An agonist
C. A synergist
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Which of the following describes a second-degree burn?
A. It involves only the epidermis. B. It involves the epidermis, part of the dermis, and may produce blisters. C. It indicates the complete destruction of both the epidermis and dermis. D. It probably will require a skin graft. E. The skin will not regenerate.
Ralph is taking scuba diving classes and is warned not to hold his breath when ascending from depth but to continuously release air from his mouth. What is the basis of this instruction, and what is the risk if it is ignored?
What will be an ideal response?
Macrophages are derived from
A. neutrophils. B. lymphocytes. C. monocytes. D. basophils. E. eosinophils.
Chromatin appears divided into segments called _________________, each of which consists of a core particle and a short segment of linker DNA leading to the next core particle.
Fill in the blank(s) with the appropriate word(s).