Explain why most adults do not have to think about how to walk even though they did when they were toddlers
What will be an ideal response?
All the neurons and connections needed for walking are in the spinal cord. What the brain contributes after the person learns to walk is the initiation of the activity.
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The oceans cover less than half of the earth's surface
Indicate whether the statement is true or false
Which of the following glands produces only one
known type of hormone? a. adrenal medulla b. adrenal cortex c. pancreatic islets d. parathyroid e. anterior pituitary
The normal vital capacity for a male is
a. 1000 milliliters. b. 2000 milliliters. c. 4800 milliliters. d. 3800 milliliters. e. 5200 milliliters
Which of the following is closest to a micrometer in size?
A) the width of a strand of DNA B) the length of a plant cell C) the length of a chicken egg D) a typical prokaryotic cell E) the size of a ribosome