Hormones act through binding to their receptors. Which of following hormones only binds to a receptor located on the cell membrane?
A. thyroid hormone
B. catecholamine
C. estrogen
D. progesterone
E. vitamin D
ANS: B
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If a myocardial infarction results in the formation of scar tissue along the pathway of the left bundle branch,
A) blood flow to the lungs will decrease. B) the ventricle will contract more forcefully. C) the right ventricle will fail to contract. D) cardiac arrhythmias may occur. E) conduction through the left ventricle would remain normal.
A fossa is a(n) ________.
A. a small depression B. rounded or knucklelike process for forming joints C. small, rounded process for attachment of ligaments or tendons D. opening or passageway through a bone
The alpha rhythm is the most prominent EEG pattern when an adult is
A. awake and thinking hard about something. B. in non-REM sleep. C. in REM sleep. D. awake and relaxed with eyes open.
Developmentally, the most significant growth in the skull occurs
A. between the ages of 5 and 10. B. between the ages of 10 and 15. C. before age 5. D. between the ages of 15 and 20. E. between the ages of 20 and 25.