Prevention of osteoporosis includes adequate intake of ________
A) potassium and vitamin D
B) vitamin D and chloride
C) calcium, and vitamin E
D) calcium and vitamin D
D
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The heart is found at what level of organization of the cardiovascular system?
A) chemical B) tissue C) organ D) cellular
Which of the following is not true of inspiration?
A. Inspiratory reserve volume is much lower than expiratory reserve volume. B. Enlargement of the thoracic cavity reduces the pressure in the lungs, leading to air entering the thoracic cavity. C. Inspiration results from contraction of the diaphragm and the external intercostal muscles. D. The anatomic dead space is about 30% of the inhaled tidal volume. E. All of these are true of inspiration.
These muscles increase thoracic cavity dimensions by elevating the first and second ribs during forced inhalation
A. External intercostals B. Scalenes C. Transversus thoracis D. Internal intercostals E. Serratus posterior inferior
Which statement correctly explains why hair appears the way it does?
A) Kinky hair has flat, ribbonlike hair shafts. B) Perfectly round hair shafts result in wavy hair. C) Air bubbles in the hair shaft cause straight hair. D) Gray hair is the result of hormonal action altering the chemical composition of melanin.