Which of the following statements is true of connective tissue?
A) Reticular fibers form thick, ropelike structures.
B) Elastin fibers are sometimes called white fibers.
C) Collagen fibers provides high tensile strength.
D) When connective tissue is stretched, collagen gives it the ability to snap back.
C
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Physiologists use chemistry to understand the workings of the body's organ systems.
Answer the following statement true (T) or false (F)
A little over 50% of the total amount of DNA in a human cell consists of genes
Indicate whether this statement is true or false.
Match the following:
A) Conducting region B) Secretory region C) Trigger zone E) Secretory zone E) Secretory zone 1) Area where nerve impulse is generated. 2) Receives stimuli. 3) Plasma membrane exhibits voltage-gated Na+ and K+ channels. 4) Plasma membrane exhibits voltage-gated Ca2+ channels. 5) Axon terminals release neurotransmitters. 6) Plasma membrane exhibits chemically gated ion channels.
Which of the following is NOT true of the cranial nerves?
A. There are 12 pairs of cranial nerves. B. Most arise from the brainstem. C. Most, but not all, are mixed nerves. D. They are part of the CNS. E. All of these are true of the cranial nerves.