Facilitated diffusion uses a channel to let components move down their concentration gradient.
a. true
b. false
Answer: a. true
Biology & Microbiology
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Turbellarian flatworms have a distinct head. When compared to the head of an insect, what is the flatworm head missing? rev
A. Sensory organs B. Light sensitive structures C. Anterior collection of nerve cells D. A mouth
Biology & Microbiology
Which valve is also known as the mitral valve?
a. bicuspid b. tricuspid c. right AV d. aortic valve e. left semilunar
Biology & Microbiology
What happens to a lizard's metabolic rate when the temperature increases 10°C?
A) The metabolic rate stays constant. B) The metabolic rate approximately doubles. C) The metabolic rate approximately triples. D) The metabolic rate approximately quadruples.
Biology & Microbiology
The respiratory control center is located in the
A) diaphragm. B) cortex. C) medulla. D) hypothalamus. E) spinal cord.
Biology & Microbiology