A person with type A blood can successfully donate blood to a person with type ________ blood.
A. A
B. B
C. C
D. O
Answer: A
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Cholinergic synapses release the neurotransmitter
A) norepinephrine. B) adrenalin. C) serotonin. D) acetylcholine. E) GABA.
Describe the structures and functions of the enteric nervous system
What will be an ideal response
The epiglottis covers the laryngeal opening when you swallow. What is the significance of this action?
A) The epiglottis prevents food and beverages from "going down the wrong pipe" by blocking the entrance to the larynx. B) The epiglottis prevents backflow of food and beverage into the pharynx. C) The epiglottis has no known function. D) The epiglottis allows food and beverages to enter the larynx.
Covalent bonds form when
A. atomic nuclei fuse. B. electrons are shared between two atoms. C. neutrons are transferred from one atom to another. D. molecules become ionized. E. protons are lost from atoms.