Which of the following is not true of the SA node?
A) It is located at the junction of the superior vena cava and right atrium near the superior end of the sulcus terminalis.
B) It is the pacemaker of the heart.
C) It sends impulses directly to the interventricular bundle of subendocardial branches (fibers).
D) It receives sympathetic impulses from the first five to six thoracic segments that accelerate its basal rate.
E) It receives parasympathetic impulses from the vagus nerve that decrease its basal rate.
Ans: C
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Which component of the TMJ secretes synovial fluid?
A. Mandibular condyle B. Disc of the joint C. Membrane lining the capsule D. Temporomandibular ligament E. Retrodiscal tissue
Colony-stimulating factors are produced by ________________ and target cells in the _____________________, which results in _______________
A. macrophages; bone marrow; stimulation of proliferation of neutrophils and monocytes B. B cells; thymus; conversion of B cells to T cells C. NK cells; blood vessel walls; vasodilation D. monocytes; blood vessel walls; vasoconstriction E. basophils; bone marrow; release of histamine
________ synthesize(s) carbohydrates and put(s) finishing touches on proteins synthesized at ________
A) The Golgi complex; smooth ER B) The Golgi complex; rough ER C) Smooth ER; rough ER D) Ribosomes; smooth ER E) Smooth ER; the Golgi complex
Presence of pus
What will be an ideal response?