In the fast block to polyspermy, binding of sperm opens up __________ channels, which depolarizes the egg membrane and prevents the entrance of any more sperm.
A. Na+
B. K+
C. Cl-
D. Mg2+
E. Ca2+
A. Na+
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What do all glial cells have in common?
A. They help to transmit the nerve signals. B. They transfer blood to the various neurons. C. They all attack pathogens. D. They assist neurons in their respective functions. E. They absorb extra blood and cerebrospinal fluid.
Plasma electrolytes include
A) urea and uric acid. B) bicarbonate, magnesium, chloride, and potassium ions. C) monocytes, basophils, and eosinophils. D) fibrinogen, globulins, and albumin.
The bundle of collagen fibers at the end of a skeletal muscle that attaches the muscle to bone is called a(n)
A) Fascicle. B) Tendon. C) Ligament. D) Epimysium. E) Myofibril
The left border of the heart is formed by the
A) left atrium and right atrium. B) right atrium and right ventricle. C) left atrium and left ventricle. D) right ventricle and left ventricle. E) None of the answers is correct.