Before the discovery of these glands, thyroid surgery often led to a rapid drop in blood calcium levels, which triggered muscle contractions and cardiac arrhythmias. What glands are these and which hormone is lacking?
A) thyroid glands; calcitonin
B) parathyroid glands; calcitonin
C) parathyroid glands; parathyroid hormone
D) thyroid glands; levothyroxine
E) parathyroid glands; levothyroxine
C
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Low-frequency vibrations occurring during early diastole and late diastole are _________________________
Fill in the blank(s) with correct word
The spontaneous opening of Na+ channels marks the beginning of ________ of a cardiac muscle cell.
A. depolarization B. repolarization C. hyperpolarization D. afterpolarization E. isopolarization
Which of the following is not normally found in plasma?
A. Fibrinogen B. Glycogen C. Albumin D. Glucose E. Urea
Which of the following would not have an effect on synaptic function?
A) interfering with neurotransmitter synthesis B) interfering with neurotransmitter reuptake C) preventing neurotransmitter inactivation D) interfering with chemically gated sodium channels E) interfering with voltage-gated sodium channels