The immediate energy system fuels muscle cells
a. with ATP only.
b. with ATP and creatine phosphate.
c. by glycolysis alone.
d. by the Krebs cycle alone.
e. by the electron transport system alone.
B
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The middle layer of the skin
(a) is called the dermis. (b) is primarily connective tissue. (c) contains collagen fibers. (d) is all of the above.
Match the following items with the correct phrases.
_______1. The immunity that a fetus acquires in utero, as a result of receiving protective antibodies from Mom's blood, is called ____________________. _______2. The immunity that someone acquires as a result of an infection is called ____________________. _______3. The immunity that someone acquires after receiving a shot of gamma globulin is called ____________________. _______4. The immunity that someone acquires as a result of receiving a vaccine is called ____________________. _______5. The immunity that an infant acquires as a result of breast-feeding is called ____________________. a. artificial active acquired immunity b. artificial passive acquired immunity c. natural active acquired immunity d. natural passive acquired immunity
Starting with citrate, how many of the following would be produced with three turns of the citric acid cycle?
A) 1 ATP, 2 CO2, 3 NADH, and 1 FADH2 B) 2 ATP, 2 CO2, 1 NADH, and 3 FADH2 C) 3 ATP, 3 CO2, 3 NADH, and 3 FADH2 D) 3 ATP, 6 CO2, 9 NADH, and 3 FADH2 E) 38 ATP, 6 CO2, 3 NADH, and 12 FADH2
The main decomposers on Earth are the:
A) viruses and protists. B) plants and fungi. C) plants and animals. D) bacteria and fungi.