Which of the following is NOT TRUE about heat
stroke?
a. 175 Americans die annually from it.
b. Peer pressure may increase risk.
c. Immediate medical treatment will reverse it,
d. Body temperature can reach 108 degrees.
e. It is more likely to occur on a humid day.
Answer: c
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Immature sperm pass through the ____, a coiled duct on top of the testes, where they mature
a. epididymis b. seminal vesicle c. prostate d. vas deferens e. prostate
Respond to items 161–165 in reference to the four cell types
listed below. a. sensory neurons b. interneurons c. motor neurons d. Schwann cells M 161. cells that carry signals to muscle cells M 162. a type of neuroglia cell E 163. cells that form myelin E 164. cells that are restricted to the brain and spinal cord E 165. cells that pick up environmental signals
The universal regulatory mechanism in eukaryotes for controlling gene expression includes
A. control of the processing of mRNA after it is transcribed from DNA but before it leaves the nucleus, and control of the rate it leaves the nucleus. B. control of the genes transcribed and the rate they are transcribed. C. control of mRNA in the cytoplasm after it leaves the nucleus, including changes to mRNA before translation begins. D. control of polypeptides after they have been synthesized but before they are functional. E. All of these mechanisms are used; there is no single universal mechanism.
The membrane potential in which there is no net movement of the ion across the membrane is called the _____
A) graded potential B) threshold potential C) equilibrium potential D) action potential