If a person were unable to form saliva, what type of gland could be missing or malfunctioning?
A. Apocrine
B. Holocrine
C. Merocrine
Answer: C
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What explains the dramatic acceleration in lengthwise bone growth at puberty?
A. Increased rate of calcium deposition occurs due to high blood calcium levels. B. Increased physical activity causes lengthwise growth in response to bone stress. C. Increased secretion of sex hormones promotes epiphyseal plate growth. D. Increased activity of osteoclasts occurs in response to parathyroid hormone stimulation. E. Increased absorption of dietary vitamins and minerals strengthens the matrix.
The sensor in tubuloglomerular feedback is a group of cells called the ________.
A. macula lutea B. glomerulus C. macula densa D. vasa recta
An organelle is
A. a small structure within a cell. B. a structure composed of several tissue types. C. the basic structural unit of all living organisms. D. a group of organs with a common set of functions. E. a group of cells with similar structure and function.
Completion of cytokinesis does not lead to
A) production of two blastomeres. B) division of the cytoplasm into two portions. C) initiation of interphase. D) completion of cleavage. E) formation of a polar body.