Ryan accidentally drops a very heavy object on his foot. in a matter of just a few seconds, he feels a tremendous amount of pain. he experienced the pain quickly because neurons rapidly carries the impulse to the brain. which structure of the neuron is responsible for the quick transmission of a nerve impulse?

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens

Pulmonary arteries carry highly oxygenated blood. true or false?