Which of the following is false about the human
nervous system?
a. Cranial nerves attach directly to the brain.
b. There are twelve pairs of cranial nerves.
c. There are twelve pairs of thoracic spinal nerves.
d. Spinal nerves attach directly to the spinal cord.
e. There are two sciatic nerves in each leg
Answer: e
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Why is it a good strategy for a microbe to adhere to a receptor that plays a critical function for a host cell?
A. It ISN'T a good strategy-host cells could shift to a backup receptor and shut down production of the main receptor, preventing infection. B. If it's a receptor the cell MUST use, it doesn't have a backup system in place to switch to-so, even though it makes it susceptible to infection, it HAS to put that target out there. This benefits the microbe. C. Microbes need to evade detection and elimination by the immune system-if they adhere to a receptor that plays a critical function, they are less likely to trigger destructive immune responses. This would be similar to using a hostage as a shield in a police-standoff situation. D. It ISN'T a good strategy-by binding to receptors, microbes will be phagocytosed by cells and destroyed within them.
Which of the following options lists the stages in cellular respiration in the correct order?
A) oxidative Phosphorylation, the citric acid cycle, and glycolosis B) The citric acid cycle, oxidative Phosphorylation, and glycolosis C) glycolosis, oxidative Phosphorylation, the citric acid cycle D) glycolosis, the citric acid cycle, oxidative Phosphorylation E) oxidative Phosphorylation, glycolosis, The citric acid cycle
A genetic condition in which abnormal hemoglobin forms, red blood cells become crescent shaped, and cells get stuck together is called ________
Fill in the blank(s) with correct word
A diabetic, who does not utilize insulin properly, will metabolize fats instead of glucose. A condition called diabetic ketoacidosis is a common result of excessive fat metabolism, causing blood pH values of 7.1 or less (normal range is 7.35-7.45). What
has happened to the blood pH and why? A) The pH is above normal (basic) because the ketones are too basic. B) The pH is below normal (acidic) because the buffering capacity was exceeded. C) The pH is not affected because the blood buffers can absorb the excess H+. D) The pH is below normal because buffers can donate OH+.