Nicotine is a drug found in cigarettes that causes blood vessels to constrict. why would a person with a family history of hypertension want to avoid smoking? nicotine increases blood pressure to unsafe levels. nicotine decreases blood pressure to unsafe levels. nicotine increases blood volume to unsafe levels. nicotine decreases blood volume to unsafe levels.

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

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.