Neurons in the hypothalamus secrete thyroid-releasing hormone (trh). trh stimulates cells in the anterior pituitary to secrete thyroid-stimulating hormone (tsh). tsh binds to receptors on epithelial cells in the thyroid gland, stimulating synthesis and secretion of thyroid hormones (ths). when the concentration of ths reaches 8 ng/ml, the neurons in the hypothalamus are inhibited from producing trh. if a person was given an injection of 52 ng/ml tsh, what effect would it have on trh production?
it would double.
it would quadruple.
it would remain the same.
it would slow or stop.

Immature bone cells, or osteoblasts, manufacture a protein called osteoid as well as several hormones. because of this, we would expect osteoblasts to contain numerous a) nuclei. b) ribosomes. c) lysosomes. d) golgi bodies.

Question 1 which of the following allows cells to take in fluids? a. phagocytosis b. pinocytosis c. exocytosis d. receptor-mediated endocytosis question 2 molecules move along their concentration gradient (from areas of high concentration to low concentration) using active transport mechanisms. a. true b. false question 3 which of the following powers active transport (ie. provides the energy for)? a. glucose b. transport proteins c. atp d. phospholipids question 4 what type of lipid is a major component of the plasma membrane? a. cholesterol b. phosopholipids c. proteins d. triglycerides

How does the fossil record provide evidence that the modern whale evolved from the anthracotheres? a) the modern whale looks like their ancestor the anthracotheres. b) the modern whale has all of the same structures as their ancestor. c) there is not enough evidence to suggest the the modern whale evolved from the anthracotheres. d) the anthracotheres has a structure that is still present in the modern whale, but is no longer of use to the modern whale.