Deep inward extensions of the sarcolemma form a tunnel-like network inside the muscle cell known as:
A) myofibrils. B) transverse tubules (T-tubules).
C) myofilaments. D) the sarcoplasmic reticulum.
Answer: B
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Individuals with type O blood are considered universal donors:
1.because they are usually very caring people. 2.because their red blood cells carry neither A nor B antigens. 3.because their plasma contains both A and B antibodies. 4.and are also called the universal recipients because they can receive any type of blood.
When does puberty begin in girls?
A. Between 10 and 12 B. Between 8 and 10 C. Between 7 and 9 D. Between 6 and 18
A functional group is best described as reoccurring clusters of
A) elements that occur in a salt. B) atoms that greatly influence the chemical properties of molecules they are part of. C) atoms that function in the body. D) elements that form at high pH. E) amino acids in a globular protein.
Much of the filtration, warming, and humidification of the air that enters the respiratory system occurs in the
A) lungs. B) trachea. C) nasal passages. D) bronchi. E) tertiary bronchi.