What is the function of the umbilical cord?
What will be an ideal response?
To transport wastes and nutrients in the blood between mother and fetus. Specifically, the arteries of the umbilical cord carry blood with metabolic wastes and carbon dioxide from the fetus to the placenta of the mother, and the umbilical veins carry oxygenated blood from the placenta of the mother to the fetus.
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Our normal blood pH should be in a fairly narrow range. Imagine you sit down to eat a large meal with cola, tomato-based sauce, and a salad with many citrus fruit slices. Identify the one statement that does not apply as one of the likely outcomes of your meal.
A. Your blood and body fluids will likely become more basic, with a higher pH than the normal range.
B. The cola, tomato, and citrus fruits will add hydrogen (H+) to your blood and body fluids.
C. All of the answer choices are correct.
D. Your body will produce buffer molecules to help neutralize acids you ate, so your blood pH doesn't change much.
E. Your blood and body fluids will likely become more acidic, with a lower pH than the normal range.
Reaction rates can be altered by all of the following EXCEPT
A) temperature B) concentration of water C) pH D) amount of enzyme E) amount of substrate.
Freshwater is most likely to become contaminated or polluted by ________ from urban and rural environments
Fill in the blank(s) with correct word
The principle that energy cannot be created or destroyed is known as ________
A) cellular respiration B) conservation of energy C) conservation of heat D) entropy