Which of the following is NOT true about the muscular system?
A) Muscles are classified as voluntary and involuntary.
B) Muscles are named based on their location and function.
C) There are 650 skeletal muscles.
D) Muscles can be controlled by a subconscious part of the brain.
Answer: C
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If the SA node fails to discharge, an electrical impulse will originate from the:
a. AV node. b. bundle of His. c. Purkinje network. d. ventricles.
Calcium, phosphorus, and magnesium all have which of the following in common?
A. They all exist in circulation as only free or ionized forms. B. They all exist as free or ionized forms, bound to proteins and complexes to radicals to form salts. C. Calcium exist as bound and free only, phosphorus exits only as bound and complexes to radical to form salts and magnesium exists as free or ionized forms, bound to proteins and complexes to radicals to form salts. D. Calcium blood levels are regulated by parathyroid hormones, phosphorus is regulated by testosterone, and magnesium is regulated by insulin.
Which organ secretes gastric juices necessary for digestion but also regulates blood sugar levels through the release of the hormone insulin?
A) gallbladder B) liver C) pancreas D) small intestine
Which of the following is NOT done when using clippers?
A. Hold the clipper blade flat against the hair B. Use a clipper guard when clipping or shaving C. Use cool lube to prevent over-heating D. Clip against the hair