Release of energy from many biological molecules requires oxygen, and yet some species are able to survive in conditions having little or no oxygen (hypoxia or anoxia). What adaptations allow them to do this?
What will be an ideal response?
Answer: The most obvious means is to decrease the energy requirements by slowing metabolic reactions in all or part of the tissues. This extends the supply of fuel that can be utilized without oxygen. Animals can also store more of their energy as glycogen, which can be metabolized by anaerobic glycolysis. Lastly, some animals have modified glycolytic pathways that produce end products other than lactate. These end products are less toxic, or can be removed easily from the body so they do not stop glycolysis.
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The ________ vein is formed by the fusion of the greater saphenous vein, femoral vein, and deep femoral vein
A) internal iliac B) external iliac C) common iliac D) inferior vena cava E) azygos
Compared to skeletal muscle, cardiac muscle ________.
A) has gap junctions that allow it to act as a functional syncytium B) lacks striations C) has more nuclei per cell D) cells are larger than skeletal muscle cells
What is the unit within each skeletal muscle fiber?
a. Microfilaments. b. Bursae. c. Myofilaments. d. Actin.
The tissue that connects muscles to bone is called __________
Fill in the blank(s) with correct word