What term describes the ectoderm, mesoderm, and endoderm?
A) Inner cell mass
B) Extraembryonic membranes
C) Primary germ layers
D) Blastomeres
Ans: C) Primary germ layers
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The perceived pitch of a sound depends on _____
A) which part of the tympanic membrane is being vibrated by sound waves B) which part of the oval window produces waves in the cochlear fluid C) which region of the basilar membrane was set in motion D) whether or not the sound moves the incus, malleus, and stapes E) whether or not the listener has had training in music
Memory cells may inhibit the immune response after an antigen has been neutralized.
a. true b. false
What blood type would a child with the genotype IAi have?
A) A B) B C) AB D) O
What happens if a neuron is stimulated enough midway in an axon to trigger an action potential?
A) The nerve impulse would go both directions from the stimulus point, but only the axon end could transfer the message trough neurotransmitters to another neuron. B) Since neuron transmission is one-way, the nerve impulse would only be transmitted to the end of the axon and then through neurotransmitters to the next neuron. C) The nerve impulse could not be transmitted because it must be initiated at the dendrite end of a neuron. D) The nerve impulse would go both directions and the dendrite end would be stimulated to send a second message through this neuron.