When you stand for a long period of time, why should you "lock" your knee in extended position? How does the knee lock?
What will be an ideal response?
Locking the knee allows you to stand for prolonged periods without using (and tiring knee joint can lock in the extended position by a slight external rotation of the tibia, which tightens the anterior
cruciate ligament and jams the menisci between the femur and tibia.
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After a particularly bad forearm break, a person loses motor function and feeling in their 4th and 5th phalanges, along with the side of the hand directly above these fingers. Which nerve(s) has/have been damaged?
A. The obturator nerves B. The axillary nerve C. The musculocutaneous nerves D. The ulnar nerve
Inability to move one side of the body is called ________________________________________
Fill in the blank(s) with correct word
Carbon dioxide is considered a/an ________.
A. element B. Both molecule and compound are correct. C. molecule D. ion E. compound
Answer the following statements true (T) or false (F)
1. The pH of a solution indicates the solution’s hydrogen ion concentration. 2. An acid solution has a pH above 7.0. 3. An acid solution has more hydroxide ions than hydrogen ions. 4. As the pH value of a solution goes up, the hydrogen ion concentration goes up. 5. A neutral solution has an equal number of hydroxide and hydrogen ions.