What has to happen to the external urethral sphincter to allow urination?
A) it must be unconsciously stimulated to contract
B) it must be unconsciously stimulated to relax
C) it must be consciously stimulated to contract
D) it must be consciously stimulated to relax
Answer: D
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Which vessel in the diagram is the afferent arteriole?
a) C b) D c) E d) F e) L
From superficial to deep, order the transversus abdominis, external oblique and internal oblique muscles. Describe the orientation of the muscle fibers for each of these as well as for the rectus abdominis muscles
What will be an ideal response
Which of the following statements about cancer cells is/are incorrect?
a. They arise only when multiple independent mutations occur within the same cell. b. They lack the ability to perform the specialized functions of the normal cell-type from which they mutated. c. The body has no means by which to defend against them. d. They usually do not adhere well to neighboring cells, so some of them may break away from the parent tumor. e. Both a and d are incorrect
This figure shows an example of regulation of hormone secretion by a negative feedback loop. The large box labeled 1 represents the initial stimulus. Which could be the initial stimulus for this pattern of regulation?
A. Low RBC (red blood cell) count B. Low body temperature C. Low blood sugar level D. High blood calcium level E. High WBC (white blood cell) count