The multiple nuclei in skeletal muscle cells are the result of the
A. action of testosterone on mesenchyme cell.
B. fusion of myoblasts.
C. cytokinesis of embryonic satellite cells.
D. stimulation of fibroblasts by hormones.
E. spontaneous development of nuclei in embryonic cells.
Answer: B
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Sperm carry
A) only one X sex chromosome, exclusively. B) only one Y sex chromosome, exclusively. C) no sex chromosomes. D) two Y sex chromosomes. E) one X or one Y sex chromosome.
The pulmonary arteries carry blood to the
A) heart. B) lungs. C) brain. D) intestines. E) liver.
Where does the axon of a primary neuron project?
A. To a secondary neuron B. To a muscle or a gland for appropriate action C. To the axon of a tertiary neuron D. Directly to the appropriate region of the brain E. To another primary neuron
The primary mechanism for exchange of individual solutes across the capillary wall is ________________ down individual __________ gradients
Fill in the blank(s) with correct word