Acetylcholinesterase, monoamine oxidase (MAO), and catechol-O-methyltransferase are
A) neurotransmitters.
B) enzymes that break down neurotransmitters.
C) enzymes that act as neuromodulators.
D) enzymes that could produce an EPSP.
E) substances that could produce an IPSP.
Answer: B) enzymes that break down neurotransmitters.
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Myasthenia gravis is a disease that is believed to be caused by autoimmune disorder, resulting in the loss of ACh receptors at the motor end plate of muscle fibers. Which of the following is likely to be a symptom of myasthenia gravis?
A) dehydration with headache B) weakness of muscle C) seizures and uncontrollable muscle movement D) coma and loss of voluntary muscle movement
Which of the following is an autoimmune disorder that leads to the destruction of acetylcholine receptors?
A. Myasthenia gravis B. Crush syndrome C. Atrophy D. Duchenne muscular dystrophy E. Rhabdomyoma
Which type of receptor binds norepinephrine on cardiac muscle, thus increasing cardiac activity?
a. cholinergic. b. nicotinic. c. alpha. d. beta1. e. beta2.
The biogenic amino hormones include __________.
a. leukotrienes, prostaglandins, and thromboxanes b. androgens, estrogens, corticosteroids, and calcitriol c. oxytocin, ADH, GH, and prolactin d. E, NE, dopamine, melatonin, and thyroid hormones