Sensory nerves that detect changes in a variable that is being regulated comprise the ________ of the control mechanism.
Fill in the blank with correct word.
receptor or ?receptors
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What role do micelles and chylomicrons play in fat absorption?
What will be an ideal response?
When are radian-based units essential?
A. when measuring linear velocity B. when measuring angular velocity C. when converting between linear and angular velocity D. all of the above
In mammals, heart size tends to be proportional to body weight while heart rate is inversely proportional to body weight. What is the most probable explanation for pygmy shrews having unusually large hearts but an unusually slow heart rate?
A) Pygmy shrews are very active so they need large hearts. B) It is possible that the heart rate of shrews has reached its absolute limitation, so a large heart can pump more blood with each beat. C) Since pygmy shrews are tiny, their heart size differs from other mammals and their heart rate is slow when they are at rest. D) The heart size of pygmy shrews varies depending on latitude.
The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on ________.
A) the location of the tissue or organ with respect to the circulatory path B) the membrane potential of the cells of the target organ C) the presence of the appropriate receptors on the cells of the target tissue or organ D) nothing?all hormones of the human body are able to stimulate any and all cell types because hormones are powerful and nonspecific