Which structures are formed from neural crest cells?
A. Pigmented body cells
B. Facial bones
C. Sensory, autonomic, and enteric neurons
D. Adrenal medulla
E. All of the choices are correct.
Answer: E
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Describe the symptoms of muscular dystrophy
What will be an ideal response?
Which of the following produces tears?
A. The tarsal glands B. The lacrimal glands C. The puncta lacrimalia D. The lateral canthi E. The lacrimal sac
Fenestrae are structures that:
a. Allow communication between smooth muscle cells otherwise separated by an elastic lamina in the tunica media b. Allow for the diffusion of molecules between the cytoplasm of the endothelium and underlying smooth muscle cells c. Anchor the bases of valves to the endothelium of lymphatic vessels d. Carry electrical impulses in the endocardium of the heart e. Penetrate through the cytoplasm of endothelial cells of capillaries
Increased ____ permeability of nodal cells hyperpolarizes the SA node
a. chloride b. iodide c. potassium d. sodium e. zinc