What types of movements are demonstrated by your arms and legs when you perform jumping jacks in physical education class? Describe these movements
What will be an ideal response?
Abduction and adduction are antagonistic actions performed during jumping jacks. Abduction is moving a limb away from the midline of the body. When you jump and move your arms and legs away, you are performing abduction. Adduction is the movement of a limb toward the body midline. When you return your arms and legs and add them back to your body, you are performing adduction.
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A) has all of the above characteristics. B) provides a barrier to water-soluble substances. C) maintains the integrity of the cell. D) controls the entry and exit of various substances.
Which of the following is an example of a pivot joint?
A) atlanto-occipital B) sacroiliac C) atlanto-axial D) vertebrocostal E) intervertebral
One effect of ADH is to:
A) decrease urine volume. B) increase blood osmolality. C) decrease blood volume. D) all of these
Which is not a function of the blood-brain barrier?
A. It protects brain neurons from exposure to abnormal hormone levels. B. It protects brain neurons from exposure to abnormal ion levels. C. It prevents brain neurons from being exposed to waste products in the blood. D. It prevents nicotine and alcohol from entering brain interstitial fluid. E. It prevents brain neurons from being exposed to drugs.