Why does a sarcomere appear to be banded, and of what are the bands composed?

What will be an ideal response?


The differences in the size and density of thick filaments and thin filaments account for the banded appearance of the sarcomere. The A band contains the thick filaments, and includes the M line. The H band has thick filaments only and the zone of overlap has both thick and thin filaments. Between the A band and the Z line is the I band (thin filaments only

Anatomy & Physiology

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All of the chemical reactions within a cell are known as cell ________.

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Which of the following is a potent mineralocorticoid that helps increase blood volume and pressure?

A. Hydrocortisone B. Norepinephrine C. Antidiuretic hormone D. Aldosterone

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Oxygen is transported in the blood as ________

A) bicarbonate ion B) oxyhemoglobin C) carbonic acid D) deoxyhemoglobin E) carbonic anhydrase

Anatomy & Physiology

Paranasal sinuses warm, cleanse, and humidify air entering the nasal cavity

Indicate whether the statement is true or false

Anatomy & Physiology