Why are slow-twitch muscles dark?
A. They are designed for strength and explosions of energy.
B. They have fewer mitochondria.
C. They have many more myofibrils per motor unit than fast-twitch fibers.
D. They contain myoglobin.
E. They need less blood than fast-twitch fibers.
Answer: D
You might also like to view...
Methane, which is composed of carbon and hydrogen, lacks functional groups and is a gas at room temperature. Upon
replacing one of the hydrogen atoms with a hydroxyl group, methane is converted to methanol, which is a liquid at room temperature. Explain the reason behind this difference in physical properties. What will be an ideal response?
The pigment most involved with photoperiodism is ____.
A. chlorophyll B. xanthophyll C. anthocyanin D. phytochrome E. phycoerythrin
A technique used in dating a rock can be used to accurately predict the age of the fossils occurring in the rocks. This technique involves
A. fossil dating. B. developmental geology. C. structural geology. D. radioactive isotope decay. E. successive rock layering.
Luminol interferes with DNA testing and, therefore, should not be applied directly to a bloodstain.
a. true b. false