In saltatory conduction, nerve impulses jump from one exposed region of the axon to another. This exposed region is called the ________
A) motor end plate
B) node of Ranvier
C) Schwann cell gap
D) interneurons
B
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What is the name of the enzyme that adds CCA to the 3' end of tRNAs?
A. tRNA nucleotidyltransferase B. Aminoacyl-tRNA synthetase C. RNA polymerase D. Peptidyl transferase
Your mother has albinism, which is a recessive trait. Your father has cystic fibrosis, which is also a
recessive trait. You just got married and discover that your new father-in-law has albinism and cystic fibrosis. What are the odds that your first child will have neither albinism nor cystic fibrosis?
a. 1/16 b. 3/8 c. 1/8 d. 9/16 e. 0
You are working with a patient who thinks they have been poisoned. Their blood pressure is elevated and tissue biopsies of the patient's liver show extra sodium channels in the kidneys. You suspect that the patient has been given
A. epinephrine. B. aldosterone. C. follicle-stimulating hormone (FSH). D. insulin. E. testosterone.
Which of the following is not true about Methylococcus and Methylomonas?
A. Most species are capable of forming cysts. B. They are strict anaerobes. C. They contain complex arrays of intracellular membranes when using methane. D. All of the choices are correct.