Which of the following cells and fragments in the blood lack a nucleus, and therefore, cannot reproduce?
A. All types of white blood cells
B. Red blood cells and platelets
C. Platelets only
D. Red blood cells only
E. Lymphocytes and monocytes
Answer: B
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Answer the following statements true (T) or false (F)
1. Dislocations in the TMJ almost always dislocate posteriorly with the mandibular condyles ending up in the infratemporal fossa. 2. Symphyses are synarthrotic joints designed for strength with flexibility. 3. A Colle's fracture is a break in the distal end of the radius 4. All of the bones of the skull, except the mandible, are united by sutures and are therefore immovable 5. The foramen magnum goes through the occipital bone.
Which of the following is NOT a disorder of water balance?
A) hypotonic hydration, in which sodium content is normal but water content is high B) excessive hydration due to excess atrial natriuretic peptide (ANP) secretion C) edema or tissue swelling, which is usually due to an increased capillary hydrostatic pressure D) excess water in interstitial spaces due to a low level of plasma proteins
People who work in factories that package buttered popcorn can develop a disorder
caused by inhaling organic dust. This disorder is called A) extrinsic allergic alveolitis. B) asbestosis. C) emphysema D) berylliosis
Select the statements about blood pressure regulation that are true?
A. Parasympathetic activity at synapses with arteriolar smooth muscle is a primary means of regulating MAP B. During the gain in adipose (fat) tissue associated with obesity, the overall length of blood vessels in the systemic circuit increases; this would tend to decrease MAP C. Decreased vagal nerve activity at the SA node will tend to increase cardiac output and MAP D. Decreases in CO2 and increases in O2 around arterioles in active muscle will produce vasodilation E. Increases in CO2 and decreases in O2 around arterioles in active muscle will produce vasodilation F. Long-term regulation of MAP is primarily due to changes in blood volume G. Increased activity of the skeletal and respiratory pumps during exercise tends to increase stroke volume H. Most baroreceptors are located in the limbs in order to closely regulate blood pressure to the periphery I. Sympathetic neurons innervate the smooth muscle layer of many arterioles J. In response to a sudden decrease in MAP, parasympathetic activity will be decreased and sympathetic activity increased K. The sympathetic NS is an important regulator of minute-to-minute changes in blood flow to organs and MAP