1. what is the function of cholesterol in the cell membrane? a. to allow substances to pass through b. to prevent the hydrophobic tails from sticking together c. to make more room inside the cell membrane d. to the cell recognize 'self' and 'non-self' 2. which of the following is a function of the nucleus? select all that apply a. breaks down macromolecules into particles the cell can use b. contains the information needed to make proteins c. directs the activities of the cell d. stores dna

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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

What is the term for a water wave that is created by an underwater earthquake?