When the voltage of a plasma membrane shifts from +35 mV towards 0 mV, the cell is ________.

A. depolarizing
B. reaching the threshold
C. hyperpolarizing
D. repolarizing
E. exiting the threshold


Answer: D

Anatomy & Physiology

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If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells ________.

A) it would be much longer before cardiac cells could respond to a second stimulation B) contractions would last as long as the refractory period C) tetanic contractions might occur, which would stop the heart's pumping action D) it would be less than 1?2 ms

Anatomy & Physiology

Anaphylaxis is the most serious potential side effect of ________________________________________

Fill in the blank(s) with correct word

Anatomy & Physiology

The only role of modulator molecules is to enhance the binding affinity of the functional site of an allosteric protein

Indicate whether the statement is true or false.

Anatomy & Physiology

High-quality ________ proteins are those that provide all the essential amino acids

A) fibrous B) complete C) globular D) net E) incomplete

Anatomy & Physiology