The human body's arterial blood pH is tightly maintained around 7.4 by buffering agents that bind hydrogen ions to stop any change in pH. If an acid-base imbalance overcomes the buffer system, the body changes the ventilation rate, or the rate at which gas enters or leaves the lungs. Changing the ventilation rate changes the concentration of CO2 in the blood, which alters the pH of the blood. In this case, the muscles that control the ventilation rate are acting as the:
A. homeostatic challenge.
B. sensor.
C. effector.
D. integrator.
E. set point.
C. effector.
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Sister chromatids are joined by a common centromere and each carries identical ____________________
Fill in the blank(s) with correct word
In the summer, temperatures in the native range for black widowbirds are exceedingly hot. To
cool themselves, the birds undergo a type of panting known as gular fluttering. This leads to evaporative water loss that cools the birds. This cooling is essential for __________.
a. meiosis b. adaptive radiation c. homeostasis d. heterotrophy
If you pick up a handful of soil from your garden, everything you are holding in your hand
represents a(n) __________.
a. organism b. population c. community d. ecosystem
During the polymerization of nucleic acids, covalent bonds are formed between neighboring nucleotides. Which carbons are involved in such bonds?
What will be an ideal response?