Humans have a thyroid gland that uses lodine to produce hormones for the body. Since our bodies do NOT make lodine the cells have to pump lodine in from the blood stream against the concentration gradient from low concentration to high. Which type of transport would the
cell use to get this necessary nutrient?
Active Transport
Osmosis
Exocytosis
Simple Diffusion

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

How do living things obtain phosphorus

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes