Which of the primary tissue types is most widely distributed throughout the body?
A. Epithelium
B. Connective
C. Nervous
D. Muscle
Answer: B
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Which of these would increase the tension generated in a skeletal muscle?
A. Stretching the muscle to very long lengths B. Switching off fast-glycolytic motor units and activating an equal number of slow-oxidative motor units C. Increasing the frequency of firing in alpha motor neurons innervating the muscle D. Resting the muscle for several weeks E. Increasing the amplitude of action potentials in the alpha motor neurons that innervate the muscle
Assuming all other values are normal, calculate the net filtration pressure in a patient with a drop in capsular hydrostatic pressure to 8 mmHg.
A. 50 mm Hg out B. 30 mm Hg out C. 20 mm Hg out D. 40 mm Hg out E. 10 mm Hg out
Sinoatrial node cells:
A. reach threshold only when action potentials generated by the AV node arrive through gap junctions. B. exhibit spontaneous depolarization that is speeded by activation of their cholinergic receptors. C. exhibit spontaneous depolarization that is speeded by activation of their beta-adrenergic receptors. D. exhibit a steep upstroke due to the presence of the same type of Na+ channels found in neuronal membranes. E. are in-between atrial muscle cells and cells of the bundle of His.
Which four factors are believed to be responsible for acne? Check the four that apply
What will be an ideal response?