What does a human neuron use to send a signal to the brain in response to a stimulus such as touch?

A. myosin and actin

B. contraction and relaxation

C. respiration and absorption

D. electrical signals and chemical neurotransmitters

Why is dna the molecule of inheritance

When the ventricles contract, the bicuspid (mitral) valve prevents blood from flowing from the: * ?

A key objective in this chapter is to identify the major enzymes in the digestion of carbohydrates, proteins, and fats as well as the organs that secrete them. This activity requires you to match the enzyme with the secreting organ.

Which statements explain ways that minerals form? Select 2 choices. They are mined from rocks. They are produced from molten minerals. They are grown in a laboratory. They are washed up on seashore. They are crystalized from a solution.

Producers are autotrophic. That is, they are able to feed themselves by converting carbon dioxide from the air and light energy from the Sun into food. Consumers and decomposers are heterotrophic.

What is the polymer of lipids

Suppose you look at a microscope to look at a cell from leaf of a tree. What structure will you see that would not be found in a cell from you finger nail. A) cilia B) mitochondria C) ribosomes D) chloroplasts

Write the equation for photosynthesis using both words and the chemical symbols

Which change shows a tenfold increase in concentration of H + ions?

Which valve prevents backflow into the right atrium?