The term used to describe the inadequate blood flow to a structure caused by obstruction of the blood supply is ________.
Fill in the blank(s) with the appropriate word(s).
ischemia
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Mary is 50 years old and has entered menopause. During a checkup, a bone scan reveals the beginnings of osteoporosis. Her physician suggests hormone therapy. What hormone might she prescribe for Mary?
A) thyroid hormone B) growth hormone C) estrogen D) parathyroid hormone E) calcitonin
Answer the following statements true (T) or false (F)
1. Neurons in the CNS are organized into functional groups. 2. Strong stimuli cause the amplitude of action potentials generated to increase. 3. The oligodendrocytes can myelinate several axons. 4. Enkephalins and endorphins are peptides that act like morphine. 5. In myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier.
The P wave on the ECG indicates __________.
a. the contraction of the atria b. the electrical events spreading out over both atria c. the spread of the electrical events down the interventricular septum d. the spread of the electrical events over both ventricles
Retrograde transport ________.
A. moves membranes, vesicles, and viruses B. uses molecular motor proteins of dynein C. moves toward the cell body D. All of the choices are correct.