Imagine you are trying to create a living, artificial cell in a lab. Considering their role in human cells, explain how you would try to use each of the four types of biological molecules in your artificial cell. For example, explain how you would use one type of molecule to establish a boundary between the water in your test tube and the inside of your artificial cell.
What will be an ideal response?
Answers should describe how classes of macromolecules are used in living systems. Lipids are useful in establishing relatively impermeable barriers to water. Carbohydrates are excellent sources of quick fuel. Nucleic acids provide a chemical substance for transmission of heritable information in reproduction. Proteins are crucial functional molecules in many ways, including enzymatic catalysis and cell motility. Membrane proteins will also be crucial in maintaining solute concentrations inside the cell at appropriate levels.
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Thyroid-stimulating hormone (TSH) is secreted by the
A. hypothalamus, and it targets cells of the posterior pituitary gland B. hypothalamus, and it targets cells of the anterior pituitary gland. C. anterior pituitary, and it targets follicular cells of the thyroid gland. D. posterior pituitary, and it targets parafollicular cells of the thyroid gland. E. thyroid gland, and it targets cells of the parathyroid gland.
The diaphragm separates the thoracic and the abdominopelvic cavities
Indicate whether the statement is true or false
Why does blood velocity decrease as it flows into a capillary bed?
A. The diameter of the capillaries is smaller than that of the arterioles and arteries. B. The cross-sectional area of the capillary beds is approximately 2000 than that of the aorta. C. The arteries are constricted. D. The pressure is much higher in the capillaries.
The visceral layer of Bowman's capsule
A. is part of the filtration membrane. B. is called endothelium. C. contains podocytes. D. is part of the filtration membrane and is called endothelium. E. is part of the filtration membrane and contains podocytes.