What factor affects hair texture?
A. The length of the shaft
B. The amount of keratin in the hair shaft
C. The color of the hair shaft
D. The shaft's cross-sectional shape
Answer: D
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Which of these pathways involves brain structures?A) The corticospinal pathwayB) The extrapyramidal systemC) The Golgi tendon organsD) The knee-jerk reflexE) All of these
What will be an ideal response?
The endoplasmic reticulum is an example of a(n) ________ organelle
A) filamentous B) extracellular C) interstitial D) membranous E) bound
The urethra contains an internal sphincter of smooth muscle
Indicate whether the statement is true or false
In the science fiction movie The Abyss, a diver is able to breathe while his head is immersed in a specially prepared liquid pumped into a water-tight helmet attached to a suit, thus allowing him to dive without an air tank and at greater depths than possible for scuba divers. Is this purely fiction, or is it at least theoretically possible? Explain, considering the nature of alveoli and alveolar
gas exchange. Assuming it is possible, describe the composition and nature of the liquid in terms of its oxygen pressure and concentration. What will be an ideal response?