Identify the cell from which all the cells of your body are descendants
A) the sperm cell
B) the oocyte
C) the fertilized ovum
D) the amnion
E) the trophoblast
Answer: C
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The energy to drive the myosin movement during skeletal muscle contraction is provided by ATP.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. Arteries always carry blood away from the heart. 2. Arteries always carry oxygen-rich blood. 3. Every blood vessel in the body has the tunica media layer. 4. Every blood vessel in the body has the tunica intima layer. 5. Veins have one-way valves that are not present in arteries.
________ of the nephron loop is/are impermeable to salt.
A. The ascending limb B. The descending limb C. Both limbs D. Neither limb
Which of the following describes the process of breathing?
A. Movement of air into and out of lungs B. Delivery of oxygen to cells C. Delivery of carbon dioxide to cells D. Forcible movement of oxygen molecules into the bloodstream