Which system would include neurons that trigger glands to secrete?
A. Autonomic motor system
B. Visceral sensory system
C. Somatic motor system
D. Somatic sensory system
E. All apply
Answer: A
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Active bone marrow is red because of the presence of ________ whereas inactive marrow is ________ because of an abundance of adipocytes.
Fill in the blank(s) with the appropriate word(s).
Rods
a. are more sensitive to light than cones b. have low acuity compared to cones c. provide vision in shades of gray d. exhibit all of the above e. exhibit only characteristics a and c
A skeletal muscle produces motion by pulling the origin toward its insertion
Indicate whether the statement is true or false
During gastrulation,
A) the blastomeres fuse. B) the placenta penetrates the endometrium. C) three germ layers are formed. D) blastomeres form. E) the neural tube closes.