Which of the following gases does endothelium release?
A. Methane
B. Nitrogen
C. Nitric oxide
D. Oxygen
Answer: C
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Johanna is significantly shorter than normal for her age. Her doctor recommends treatment with a hormone before her growth plates ossify in her long bones. Which hormone is recommended?
A) cortisol B) thyroid stimulating hormone C) parathyroid hormone D) growth hormone
Cerebrospinal fluid of the central nervous system and synovial fluid of joint capsules are both examples of
A. extracellular fluid. B. intracellular fluid.
What are the two major methods by which cells communicate to coordinate their functions?
A) positive feedback loops and negative feedback loops B) chemical messengers and/or electrical signals C) effectors and responses D) temperature gradients and pressure gradients
Detection of the frequency of a sound above 5 kHz is based upon:
A. the number of fibers discharging in cranial nerve VIII B. the phase difference between the sound waves at the two ears C. the direction of deflection of the hair cell cilia D. the location along the cochlea of the most intensely stimulated hair cells E. the frequency of action potentials in cranial nerve VIII