Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?

A) gamma aminobutyric acid

B) acetylcholine

C) cholinesterase

D) norepinephrine

Which of the following statements explains why the sugar glider and the flying squirrel both have the ability to glide? A) Both evolved at the same time in geologic history. B) Both interbred and blended their gene pools in the past.

Breifly explain the nitrogen cycle

How was cell theory developed?

If two proteins have the same molecular weight, are they necessarily the same protein? explain?

How did the Miller-Urey experiment impact the way scientists think about the origins of life? Use what you know about the Miller-Urey experiments to discuss the factors needed for life to arise, and speculate on whether life could arise on another

The nurse is educating the parents of a 5-year-old girl with infectious conjunctivitis about the disorder. which information is most important to provide to prevent the spread of the disorder

Which is an example of the way matter cycles through the bodies of living things? A) A fish swims in the ocean. B) The sun heats up a rock. C) One animal eats another animal. D) Trees convert sunlight to energy.

Which of the following substances is used up during photosynthesis? Oxygen Sugar Sulfur dioxide Water

What is the role of mouth

Which atoms are found in all carbohydrates?