Which of the following does not directly influence motor neurons?
a. primary motor cortex
b. cerebellum
c. brain stem
d. afferent neurons (through intervening interneurons)
e. None of the above
B
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In bone, osteoblasts serve mainly to dissolve bone and mobilize Ca2+.
Answer the following statement true (T) or false (F)
The superior __________ arteries supply the diaphragm.
Fill in the blank(s) with the appropriate word(s).
The energy for cross bridge cycling during muscle contraction is provided by
a. acetylcholine. b. Ca2+. c. ATP. d. myosin. e. actin.
Why is articular cartilage an important part of long bone structure?
A) Articular cartilage lines all inner surfaces of the bone. B) Articular cartilage allows bones to rub together with reduced friction at joints. C) Articular cartilage is the site of lengthwise growth in young children and adolescents. D) Articular cartilage houses red bone marrow for hematopoiesis.