The ____________________ is the normal pacemaker of the heart
Fill in the blank(s) with correct word
SA node
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The cranial nerve responsible for movement of the medial rectus, superior rectus, inferior rectus and inferior oblique eye muscles is the ________ nerve.
A. hypoglossal B. oculomotor C. trochlear D. abducens E. trigeminal
Urine is carried to the urinary bladder by
A) blood vessels. B) lymphatics. C) the ureters. D) the urethra. E) the calyces.
Match the following:
A) Osteoblasts B) Osteoclasts C) Endosteum D) Lamellae E) Canaliculi 1) The lining of the marrow cavity. 2) Cells that can dissolve the bony matrix. 3) Layers of bone matrix. 4) Small channels that radiate through the matrix of bone. 5) Cells that can build bony matrix.
Which applies to the classical complement pathway, but NOT to the alternative complement pathway?
A. Activation of C3 results in the formation of C3b. B. There is a cascade of proteins activated, which results in the killing of microbes. C. Complement proteins serve as opsonins that facilitate phagocyte binding to microbes. D. Antibodies activate the first complement protein (C1). E. Complement activation leads to the development of a multiunit protein called the membrane attack complex (MAC).