What is the function of the arrector pili muscle?
A. Strength
B. Movement
C. Nourishment
D. Pigmentation
Answer: B
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Tetanic muscle contractions don't occur in a normal cardiac muscle because
A) cardiac muscle tissue contracts on its own. B) neural stimulation is lacking. C) the refractory period lasts until the muscle relaxes. D) the refractory period ends before the muscle reaches peak tension. E) potassium channels outnumber sodium channels.
Functions of the liver include ________.
A. production of many blood proteins B. interconversion of nutrients C. bile production D. detoxification of harmful chemicals E. All of the choices are correct
In the ovarian cycle, the dominant follicle
A. is selected on day 1 of the cycle, and no other follicles develop beyond that day. B. undergoes atresia. C. continues to grow beyond day 7 of the cycle, while the other developing follicles degenerate. D. is selected to continue growing at about the middle of the luteal phase. E. ruptures during ovulation on day 21 of the cycle.
Branches that sometimes occur along the length of an axon are called
A) axon terminals. B) dendrites. C) axon hillocks. D) synapses. E) collaterals.