Which labeled structure in the diagram secretes glucagon?
a) A
b) B
c) C
d) D
e) E
b
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Answer the following statement(s) true (T) or false (F)
1. Locomotion is a function of the spinal cord. 2. Ascending signals in the spinal cord travel via gray matter, while descending signals travel via white matter. 3. The cervical and lumbar enlargements are wide points in the spinal cord marking the emergence of motor nerves. 4. Nerve fibers in a given white matter tract are similar in origin, destination, and function. 5. Voluntary motor signals typically begin in an upper motor neuron in the thalamus.
What are the main antigen-presenting cells in the body?
A. Neutrophils B. Fibroblasts C. Helper T cells D. Plasma cells E. Macrophages
Digitalis, A drug used to treat heart failure, increases the strength of heart contractions. On which phase of the cardiac cycle does this likely have the greatest effect?
Systole or diastole
Contrast the effects of a hypotonic solution and a hypertonic solution on a red blood cell
A) The hypotonic solution would not cause a change in the RBC, and the hypertonic solution would cause the RBC to swell and it may burst (hemolysis). B) The hypotonic solution would not cause a change in the RBC, and the hypertonic solution would cause the RBC to shrink (crenation). C) The hypotonic solution would cause the RBC to shrink (crenation), and the hypertonic solution would cause the RBC to swell and it may burst (hemolysis). D) The hypotonic solution would cause the RBC to swell and it may burst (hemolysis), and the hypertonic solution would cause the RBC to shrink (crenation). E) The hypotonic solution would cause the RBC to swell and it may burst (hemolysis), and the hypertonic solution would not cause a change in the RBC.