True or False? Rats and humans share over 90% of the same genes.
Answer the following statement true (T) or false (F)
True
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Dorsal root ganglia contain the cell bodies of efferent neurons.
Answer the following statement true (T) or false (F)
The ________ tightens the neck and draws the corners of the mouth downward as in expressing horror
A) platysma B) mentalis C) sternocleidomastoid D) sternohyoid
During spermiogenesis ________
A) the acrosome migrates towards the posterior end of the spermatid because its hydrolytic enzymes will be needed for digestion of the excessive cytoplasm around the flagella of the developing sperm B) the acrosome migrates towards the anterior end of the spermatid because its hydrolytic enzymes will be needed for penetration when the sperm contacts the egg during fertilization C) the acrosome migrates towards the anterior end of the spermatid because its pointy shape helps the sperm to move more efficiently D) the acrosome migrates towards the posterior end of the spermatid because of its ability to propel the flagella moving the sperm through the female reproductive system towards the egg
Stroke volume is determined by the extent of venous return and parasympathetic activity
Indicate whether the statement is true or false