Which molecule blocks the myosin head from binding to actin in a relaxed muscle?

A. Troponin
B. Titin
C. Tropomyosin
D. Calcium


Answer: C

Anatomy & Physiology

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________ fibers are stronger than steel when stretched

A) Calcium B) Mineral C) Elastic D) Carbon E) Collagen

Anatomy & Physiology

Salt was added to a beaker of distilled water (the water was not stirred). A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours

A. the samples would still be 2% and 20% respectively. B. the difference in the percentage of salt between the top and bottom samples would increase. C. the salt would float to the top. D. the percentage of salt in the top and bottom samples would be approximately equal. E. None of the choices are correct.

Anatomy & Physiology

In which type of reaction are water molecules split off as peptide bonds are formed?

Hydrolysis Dehydration synthesis Glycolysis Lipolysis

Anatomy & Physiology

What is the correct order of structures through which air flows into the respiratory tract?

A. Larynx; pharynx; trachea; bronchioles; bronchi B. Pharynx; larynx; trachea; bronchi; bronchioles C. Larynx; pharynx; trachea; bronchi; bronchioles D. Larynx; pharynx; bronchi; trachea; bronchioles E. Pharynx; trachea; larynx; bronchi; bronchioles

Anatomy & Physiology