Which is characteristic of a person chronically suffering from hypoxic hypoxia?
A. Lower-than-normal blood flow through tissues
B. Lower-than-normal lactic acid production
C. Higher-than-normal alveolar PO2
D. Higher-than-normal arterial PO2
E. Higher-than-normal hematocrit
Answer: E
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Dancers will use a technique called "spotting" when they perform spins of the body. By holding their head and eyes on a fixed point in front of them as their body spins they reduce the amount of head spinning and this prevents dizziness
Which of the following is the most likely explanation for why this works? A) This will help to reduce the lateral flection of the head and will prevent hyper polarization or depolarization of the hair cells in the macula. B) This helps keep the motions detected by the eyes congruent (aligned) with the motions sensed by the vestibular apparatus. C) Reducing the inertia of head spin will reduce the flow of endolymph that deflects the hair cells of the crista ampullaris. D) When the eyes send a static vision of stability to the brain, it is tricked into believing the body is still and therefore dizziness will not occur.
Nerve fibers in the phrenic nerves that innervate the diaphragm arise primarily from what plexuses?
A) brachial B) cervical C) lumbar D) sacral
Within the kidney, several nephrons merge and empty their forming urine into a common
A. distal convoluted tubule. B. collecting duct. C. renal pelvis. D. nephron loop. E. minor calyx.
The following are important steps in the process of endochondral ossification
1. Blood vessels grow around the edges of the cartilage and perichondrium differentiates into osteoblasts. 2. Capillaries and osteoblasts migrate to the epithyses forming the secondary ossification centers. 3. Chondrocytes enlarge and the surrounding matrix begins to calcify. 4. Remodeling continues and the shaft becomes thicker. 5. Blood vessels penetrate the cartilage and invade the central region forming the primary ossification center. What is the correct order for these events? A) 3, 1, 5, 4, 2 B) 1, 3, 5, 4, 2 C) 1, 5, 3, 4, 2 D) 2, 3, 1, 5, 4 E) 3, 1, 4, 5, 2