Which muscle(s) of respiration is(are) innervated by the phrenic nerve?
A. Diaphragm
B. Innermost intercostals
C. External intercostals
D. Pectoralis major
E. Internal intercostals
Answer: A
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The bones of the pectoral girdle are part of the axial skeleton.
Answer the following statement true (T) or false (F)
Which of the following is NOT a characteristic of connective tissues in general?
A. The cells are packed tightly together, as they are in epithelial tissues. B. Most connective tissues are well-supplied with blood vessels. C. The ground substance can vary from liquid to solid. D. Connective tissues contain an abundance of extracellular matrix. E. All of these are characteristics of connective tissues in general.
Female accessory sex organs develop because of the increase in estrogen from the ovaries during puberty.
Answer the following statement true (T) or false (F)
Microtubules are composed of protein subunits known as:
A) myosin. B) keratin. C) tubulin. D) actin.