Question

33. Ms. Evil is trying to develop a toxin that would affect the nervous system of her neighbor's dog, Boof. muscle bands that are the vocal cords necessary for barking, she could get som compound that causes Na+ gates in axons to stay open. You correctly predict that when Ms. Evil injects for hours at a time. She hypothesizes that if she could develop a toxin that would just affect the e sleep. She developsa Boof with this compound (through a hole in the fence). a) action potentials in presynaptic neurons could still be measured Boofs vocal cords would continue to contract normally c) transmission of an action potential across the synapses would continue d) Nat concentrations inside and outside the cell membrane of the axon would become approximately equal e) (a), (c) and (d) would all occur 34. The next morning, Ms. Evil is surprised to see that Boof is quietly stretched out on the ground next to the fence. Alas, Boof is now silent and dead. You would correctly predict that Boof died of a) barking to exhaustion b) seizures c) paralysis of breathing muscles d) fear of Ms. Evil e) a life-threatening heat gradient between the dog and the fence 35. BoTox is a protein toxin obtained from the bacterium Clostridium botulinum. BoTox is used in small quantities in the cosmetic industry to lessen frown lines and certain wrinkles by injecting it directly into the muscles that cause frowning or wrinkles. It has also been used to reduce sweating in people with the condition of hyperhidrosis (excessive sweating). In large quantities it is potentially lethal to humans. It causes general paralysis and respiratory failure followed by death. Which of the following mechanisms would you correctly predict for the action of botulism poisoning? ) Inhibiting the enzyme acetylcholinesterase in the synapse b) Blocking the release of a neurotransmitter c) Mimicking a neurotransmitter (e.g., acetylcholine) d) Stimulating the release of a neurotransmitter

Answer 1

36: Since the Sapindaceae population genetic variation was higher in Asia, the introduced population represented Founder's effect that refers to reduction of the genetic variations when the small number of individuals from a large population inhabit the new location.
Option C is the correct answer.