The transmission of information from one neuron to another has been found to occur by all of the
following mechanisms EXCEPT
a. neurotransmitters released from vesicles.
b. components of a membrane can act as neurotransmitters.
c. electrical connections.
d. chemical signals transmitted through electrical connections.
e. a gas that diffuses through a cell membrane.
D
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The barrier between the intracellular and extracellular fluid compartments in an animal or plant is the
A. plasma membrane. B. walls of capillaries. C. nuclear membrane. D. membrane of the endoplasmic reticulum. E. membrane of the Golgi apparatus.
Which of the following happens right after the acrosomal reactions to prevent additional sperm from entering the egg?
a. The blastocyst is formed. b. The trophoblast is formed. c. The blastula is formed. d. Cleavage happens immediately.
The ____ would most likely contain blood that needs to be cleansed
a. renal vein b. renal artery c. nephron d. kidney e. bladder
Typical ratios resulting from epistatic interactions in dihybrid crosses would be ________
A) 3:1, 1:1 B) 9:3:3:1, 1:2:1 C) 1:2:2:4:1:2:1:2:1, 1:2:1 D) 1:1:1:1, 1:4:6:4:1 E) 9:3:4, 9:7