Males who have an extra X chromosome (47,XXY) have ____
a. Tay-Sachs disease
b. Down syndrome
c. carcinoma
d. Klinefelter's syndrome
d
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State three rules that should be followed to ensure safety when tying horses
What will be an ideal response?
A water solution that contains equal numbers of hydrogen ions and hydroxide ions is
A. acidic. B. alkaline. C. basic. D. neutral.
What action is most responsible for the resting membrane potential in cardiac muscle cells?
A. movement of K+ through voltage-gated K+ channels B. movement of Na+ through open Na+ channels C. movement of Ca2+ through voltage-gated Ca2+ channels. D. closing of Na+ and K+ voltage-gated channels
Compared to a somatic reflex, an autonomic reflex utilizes
A. two motor neurons plus skeletal muscles as effectors. B. one motor neuron plus cardiac and smooth muscle and glands as effectors. C. two motor neurons plus cardiac and smooth muscle and glands as effectors. D. three motor neurons plus skeletal muscles as effectors. E. one motor neuron plus skeletal muscles as effectors.