The element that forms the backbone of organic molecules is ________.
A. nitrogen
B. hydrogen
C. oxygen
D. carbon
Answer: D
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Answer the following statements true (T) or false (F)
1. The organs of the respiratory system are designed to perform two basic functions: air distribution and gas exchange. 2. The upper respiratory tract consists of the nose, pharynx, and trachea. 3. The lower respiratory tract consists of the larynx, bronchi, and lungs. 4. A “head cold” involves the upper respiratory tract. 5. A “chest cold” involves the lower respiratory tract.
Part of the process of epithelial tissue repair is the formation of a strong, but inelastic, tissue. What is this tissue called??
A) ?Scar B) ?Scab C) ?Suture
The cytoplasm within a cell body of a neuron is called the
A. neurokaryon. B. soma. C. perikaryon. D. chromatophilic substance. E. chromatophobic substance.
What part of the axon is called the trigger zone?
A. Terminal arborization B. Synaptic knob C. Myelin sheath D. Axon hillock