Select the incorrect statement related to sarcomere structure and function.
A. Two Z lines form the opposite borders of one sarcomere.
B. Thin filaments are not present in the H band of a sarcomere.
C. I bands consist of both thin and thick filaments.
D. Stacks of thick filaments produce dark bands, called the A band.
E. Sacromeres are the smallest subunits of muscle contraction.
C. I bands consist of both thin and thick filaments.
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If the number of chromosomes in an animal's gametes is 20, then a somatic cell from that animal
would contain ____ chromosomes.
a. 5 b. 10 c. 20 d. 40 e. 80
Which of the following is false regarding age-related
macular degeneration? a. It results in progressive destruction of photoreceptors in the fovea and surrounding region. b. It clouds the center of the visual field. c. It has no genetic basis. d. Smoking, high blood pressure, and obesity increase its risk. e. It cannot be cured, but its progression can be slowed.
Which of the following does NOT distinguish mitosis in plant cells from mitosis in animal cells?
A. production of a cell plate B. production of a furrow C. presence of centrioles D. presence of centromeres
The somatosensory cortex _____.
A. maps the distribution of somatic receptors on the body B. consists of gray matter C. involves only the spinal cord D. responds to all signals equally E. is not responsive to mechanoreceptors