How do early microscopes compare with modern microscopes?
What will be an ideal response?
Early microscopes used only light and could magnify only 10 to 20 times. Today's modern compound light microscopes can magnify up to 1000 times, and modern microscopes using beams of electrons instead of light can magnify over 1 million times.
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Which statement accurately describes alveolar and systemic gas exchanges?
A. In both alveolar and systemic gas exchange, oxygen diffuses out of the blood. B. In both alveolar and systemic gas exchange, oxygen diffuses toward the blood. C. In alveolar gas exchange oxygen diffuses into the blood, but in systemic gas exchange it diffuses out of the blood. D. In alveolar gas exchange oxygen diffuses out of the blood, but in systemic gas exchange it diffuses into the blood.
Each red blood cell is shaped as a biconcave disk. This allows it to
A) change its shape to squeeze through narrow openings and shrink or swell slightly in response to osmotic conditions. B) change its shape to squeeze through narrow openings, shrink or swell slightly in response to osmotic conditions, and synthesize new proteins and membrane components readily. C) shrink or swell slightly in response to osmotic conditions. D) change its shape to squeeze through narrow openings. E) synthesize new proteins and membrane components readily.
You are riding your bicycle over a very bumpy road, reading a street sign far ahead of you. Which sensory inputs are NOT required to accomplish this task?
A) Proprioceptors B) Visual inputs C) Inner ear D) All of the above are required.
Which of the following is involved in draining blood and CSF from the lateral portion of the brain from the cavernous sinus to the internal jugular veins?
A) external jugular veins B) superior sagittal sinus C) temporal veins D) petrosal sinus E) straight sinus