Which structure allows the action potential to travel deep into the interior of the cell to each contractile organelle?

A) Myofibril
B) T-tubule
C) Sarcolemma
D) Sarcoplasm


Answer: B

Anatomy & Physiology

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When two or more graded potentials arrive at the trigger zone within a short period of time, their effects are additive and ________ occurs.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

The epiglottis is a malignant tumor, which sometimes grows in the throat

Indicate whether the statement is true or false

Anatomy & Physiology

The flexor muscles in the anterior arm (biceps brachii and brachialis) are innervated by what nerve?

A) radial B) median C) ulnar D) musculocutaneous

Anatomy & Physiology

Which is not true about spermatogenesis?

A. The process includes two meiotic divisions. B. The final stage of the process is called spermiogenesis. C. Mature spermatozoa are haploid (n=23). D. Spermatogenesis begins at birth and continues throughout a man's life. E. The process takes place in the walls of the seminiferous tubules.

Anatomy & Physiology