How is Chaga’s disease transmitted?
a. The Anopheles mosquito bites the victim and passes Trypanosoma gambiense via the saliva.
b. The Glossina tsetse fly bites the victim and passes Trypansoma brucei in the feeding tube.
c. The kissing bug (Triatoma) bites the victim, defecates in the wound, and passes Trypanosoma cruzi to the victim in the feces.
d. The victim drinks water contaminated by the feces of an organism with an active infection and Giardia lamlia is in the water.
c. The kissing bug (Triatoma) bites the victim, defecates in the wound, and passes Trypanosoma cruzi to the victim in the feces.
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All genes on all human chromosomes are subject to imprinting. Indicate whether the statement is true or false
Two fundamental concepts about the ion channels of a "resting" neuron are that the channels _____
A) are always open, but the concentration gradients of ions frequently change B) are always closed, but ions move closer to the channels during excitation C) open and close depending on stimuli, and are specific as to which ion can traverse them D) open in response to stimuli, and then close simultaneously, in unison
Use the basic steps of the scientific method to describe Pasteur's experiments to investigate spontaneous generation
What will be an ideal response?
Prevention of low back pain is a benefit of increased flexibility.
a. true b. false