Some muscle and nerve cells in humans may approach a meter in length.
Answer the following statement true (T) or false (F)
True
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The smallest stimulus strength that triggers a contraction in a muscle fiber is called a(n) ______ stimulus.
Neural stem cells can be harvested from autopsies and stored, alive, in banks, whereas
neurons cannot, because A) neural stem cells have lower oxygen and energy requirements than neurons. B) neural stem cells have higher oxygen and energy requirements than neurons. C) neural stem cells have more globular shapes than neurons. D) people do not will them to science.
What tissue forms the model for endochondral ossification?
fascia membranes bone cartilage
The link between a first messenger and a second messenger in a cell that responds to peptide hormones is usually
A) cAMP. B) cGMP. C) ATP. D) a G protein. E) calcium ion levels.