What provides toughness to the dermis and holds water in this skin layer?
A) Merkel cells
B) collagen fibers
C) melanocytes
D) elastic fibers
E) epidermis dendritic cells
B
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Activation of the parasympathetic nervous system triggers renin release from the JG apparatus of the kidneys
Indicate whether this statement is true or false.
Which of the following is not true about a positive Babinski reflex?
A) normal in newborns B) abnormal in adults C) a sign of injury to descending spinal tracts D) clinicians test this when a peripheral nerve injury is suspected E) flaring of the toes when the sole is stroked
What is the embryological origin of the superior vena cava?
A. The umbilical veins B. The pharyngeal arches C. The aortic sac D. The cardinal veins E. The vitelline veins
What is the difference between a micelle and a chylomicron?
A) Micelles are lipid-bile salt complexes, whereas chylomicrons are lipoproteins. B) Micelles are lipoproteins, whereas chylomicrons are lipid-bile salt complexes. C) Micelles are found only in adipocytes, whereas chylomicrons are found in the bloodstream. D) Micelles are produced in the liver, whereas chylomicrons are produced in the intestinal lumen. E) Micelles are also known as high-density lipoproteins, whereas chylomicrons are also known as low-density lipoproteins.