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Home Q & A Board Biology-Related Homework Help General Biology
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EmpressDina EmpressDina
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6 years ago
Which of the following is the largest lymphoid organ, and filters pathogens, worn-out red blood cells, and platelets from blood vessels?
 
  a. spleen
 b. thymus gland
 c. lymph nodes
 d. tonsils

Question 2

Which neurotransmitter is responsible for causing muscle contraction?
 
  a. ACh
 b. ATP
 c. Calcium
 d. Potassium
 e. Sodium
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oliverb1oliverb1
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6 years ago
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EmpressDina Author
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6 years ago
You make an excellent tutor!
Cdfields
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Yesterday
Thanks
asd454512
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2 hours ago
Thanks for your help!!
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