By the end of 8 weeks, the individual is considered a fetus because ________
A) all of the organ systems are present
B) the amniotic cavity has formed
C) the mesoderm has formed
D) the neural tube and yolk sac have formed
E) all the primary germ layers are formed
A
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The action that the iliopsoas, sartorius, and rectus femoris perform on the femur is ____________________.
Fill in the blank(s) with the appropriate word(s).
During the absorptive state, insulin release is
A. inhibited. B. stimulated.
What is the function of the basal nuclei in normal motor control?
A. They provide a perceptual awareness related to specific sensory inputs from the eyes, nose, and mouth. B. They provide a general perceptual awareness associated with somatosensory inputs from the skin, muscles, and joints. C. They provide a sense of the cause-and-effect relationships between muscle actions and the consequences of taking these actions before executing them. D. They participate in a looping neuronal circuit through which motor impulses are sent to facilitate or suppress movements. E. They form an initial intention to move, such as when you decide to pick up an object.
What is the importance of reciprocal innervation in muscular reflexes?
A. It prevents simultaneous activity of antagonistic muscle groups that would impede limb movement. B. It ensures that limbs on the contralateral side of the body perform the same movements as those on the ipsilateral side. C. It maintains signaling along afferent neurons from stretch receptors, even when a muscle shortens rapidly. D. It prevents excessive force on a muscle from resulting in tearing of fibers, or damage to the tendon. E. It recruits synergistic muscles to come to the aid of a muscle that help it generate force and limb motion.