A simple carbohydrate
A) has only one nucleotide.
B) is a building block of protein.
C) has a molecular formula of C6H12O6.
D) consists of several joined chains.
C
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The pulse of a long-distance runner is measured by a doctor. Their heart rate is 53 bpm. This heart rate demonstrates a type of arrhythmia called ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following two organs function as the most important physiological buffer systems?
A) the lungs and the kidneys B) the adrenal glands and the testes C) the thyroid gland and the heart D) the stomach and the liver
Sensory neurons that maintain their firing as long as the stimulus is present are called ________.
Fill in the blank(s) with the appropriate word(s).
Most of the calcium that triggers contraction of cardiac muscle comes
A. into the cell through leakage channels in the sarcolemma. B. from the Golgi apparatus of the cell. C. into the cell through voltage-gated channels in the sarcolemma. D. from the sarcoplasmic reticulum of the cell.