Which of the following is TRUE? The site of communication between two neurons is called an axon hillock. Dendrites are the receiving or input portion of a neuron. The cytoplasm of an axon is called the axolemma. The presynaptic neuron carries a nerve impulse away from a synapse. The plasma membrane of an axon is called the axoplasm.

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.

As a result of climate change earths temperature is rising and sea ice is melting what is a likely effect? answer : populations of walruses and polar bears will decline

Match each phylum or class to its correct characteristic