What is the most precise description of a false rib?
A. A rib that never ossifies, but remains as cartilage throughout life
B. A rib that connects indirectly to the sternum by a costal cartilage, or has no connection to the sternum
C. A rib that connects directly to the sternum by its own costal cartilage
D. A rib that has no cartilaginous connection to the sternum
E. A rib that does not articulate with the vertebral column
Answer: B
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Match the following stages of sleep with their descriptions:
A) Stage 2 B) Stage 1 C) Stage 3 D) REM E) Stage 4 1) The stage when vital signs (blood pressure, heart rate, and body temperature) reach their lowest normal levels. 2) Indicated by movement of the eyes under the lids; dreaming occurs. 3) Theta and delta waves begin to appear. 4) Very easy to awaken; EEG shows alpha waves; may even deny being asleep. 5) Typified by sleep spindles. 6) Begins about 90 minutes after the onset of sleep. 7) Necessary for emotional health; may be neural "debugging."
Valves in lymphatic vessels resemble those of veins and allow the movement of fluid in ________.
Fill in the blank(s) with the appropriate word(s).
Which of these areas is located in the postcentral gyrus of the cerebral cortex?
A) olfactory cortex B) visual cortex C) primary motor cortex D) primary somatic sensory cortex E) primary auditory cortex
What is the purpose of the paranasal sinuses that connect with the nasal cavity?
A. Reduce the weight of the skull B. Resonance chambers for speech C. Gas exchange D. Both reduce the weight of the skull and resonance chambers for speech.