When you go outside on a hot summer day, your body temperature heats up above the normal range. Receptors in your brain detect the change in body temperature. The brain activates nerve cells that send messages to sweat glands, causing the body temperature to fall as the sweat evaporates from the skin. What part of this feedback loop is the stimulus?
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In an x-ray film of the skeletal system, the dense tissue ar…
In an x-ray film of the skeletal system, the dense tissue areas appear ________ because they ________ the x-rays; and the less dense tissues appear ________ because they ________ the x-rays.
Which of the following chemical reactions best represents th…
Which of the following chemical reactions best represents the decomposition of ATP?
“Cutting off your nose” would be a section in the ________ p…
“Cutting off your nose” would be a section in the ________ plane.
An electrolyte is
An electrolyte is
The fluid-mosaic model of the plasma membrane suggests that
The fluid-mosaic model of the plasma membrane suggests that
The four most abundant elements in the human body are
The four most abundant elements in the human body are
In the process of diffusion, net movement of substances is a…
In the process of diffusion, net movement of substances is always from a region
Magnetic resonance imaging is based on the movement of
Magnetic resonance imaging is based on the movement of
The innermost serous membrane attached to the heart muscle i…
The innermost serous membrane attached to the heart muscle is called the: