The innermost region of the kidney is called the ________.
A. renal pelvis
B. renal medulla
C. renal cortex
D. calyx
Answer: A
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Which of the following conditions can be the result of prolonged physical activity, excessive fluid/electrolyte loss, or menstruation?
A) Fibromyalgia syndrome B) Tetanus C) Cramps/spasms D) Strains/tendinitis
The anions in highest concentration in the extracellular fluid are
A) sodium, chloride, and bicarbonate. B) sodium, potassium, and bicarbonate. C) sodium, potassium, and chloride. D) proteins, bicarbonate, and chloride. E) sodium, potassium, and phosphate.
True flight first arose in
A) Bats. B) Birds. C) Insects. D) Reptiles.
Answer the following statements true (T) or false (F)
1. A motor neuron and all the muscle cells it stimulates are called a motor unit. 2. The point of contact between the nerve and muscle is called a motor unit. 3. The minimum level of stimulation required to cause a muscle fiber to contract is called the threshold stimulus. 4. When a muscle fiber is exposed to a greater-than-threshold stimulus, it contracts completely. This is called an all-or-none response. 5. All motor units in a given muscle have the same threshold stimulus.