Which of the following is an example of passive transport across the cell membrane?
A. the stimulation of a muscle cell
B. the uptake of glucose by the microvilli of cells lining the stomach
C. the movement of insulin across the cell membrane
D. the movement of carbon dioxide across the cell membrane
E. the selective uptake of hormones across the cell membrane

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

the answer is c. altitude. hope this ! #brainiac

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.