Discuss why an acidic pH is necessary for the stomach's activities to be accomplished
What will be an ideal response?
Hydrochloric acid makes the stomach contents acidic. Acid is necessary for the activation of pepsinogen into pepsin. Pepsin is the active protein-digesting enzyme that begins protein digestion in the stomach. Without the acidic environment, about half of the process of protein digestion would not be able to occur.
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Which of the following is not true of a hydrocele?
A) It can be distinguished from a hematocele by transillumination. B) It is typically associated with a direct inguinal hernia. C) It refers to excess fluid in a persistent processus vaginalis. D) It may be confined to the spermatic cord. E) It may be associated with inflammation of the epididymis.
Which of the following muscles are extensors of the leg?
A) vastus intermedius B) rectus femoris C) vastus lateralis D) vastus medialis E) All of the answers are correct.
Answer the following questions true (T) or false (F)
1. Fetal heart rate and respiratory rate are both lower than those of adults. 2. Breast milk also acts as a mild laxative and helps cleanse meconium, a tarry, green fecal material made up of bile and other wastes that is first excreted by the newborn. 3. A female will express the trait for an X-linked disorder only if she is homozygous for the recessive allele.
Answer the following questions true (T) or false (F)
1. The loss of potassium ions from the cell during the repolarization stage restores a membrane potential of -90 mV. 2. The entry of acetylcholine into a muscle cell through ligand-gated ion channels depolarizes the sarcolemma locally. 3. ATP is required for a power stroke to be repeated during the contraction cycle.