Growth of hair is:
a. constant
b. cyclic with periods of growth and periods of inactivity
c. only occurs on the head
d. the same on all parts of the body
Answer: b. cyclic with periods of growth and periods of inactivity
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As the concentration of red blood cells increases in the blood, the viscosity of the blood increases
Indicate whether the statement is true or false
Developing sperm cells are protected by a blood-testis barrier formed by
A. sustentacular cells. B. interstitial spaces. C. leukocytes. D. Leydig cells. E. connective tissue septa.
Which is true regarding the process of meiosis?
A. Most growth in the body is accomplished through meiosis. B. Meiosis results in identical sex cells. C. Meiosis forms haploid daughter cells from a diploid cell. D. Meiosis begins in a haploid state and concludes in the diploid condition. E. Meiosis is represented by the notation: n ? 2n.
The figure illustrates a detailed drawing of the neuromuscular junction. What does "D" represent?
A. Postsynaptic membrane B. Synaptic cleft C. Synaptic vesicles D. Sarcolemma E. Presynaptic terminal