Thick filaments within the myofibril are composed of

A) actin.
B) myosin.
C) titin.
D) sarconin.


Ans: B) myosin.

Anatomy & Physiology

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When adenyl cyclase is activated,

A) ATP is consumed. B) cAMP is formed. C) cAMP is broken down. D) ATP is produced. E) ATP is consumed and cAMP is formed.

Anatomy & Physiology

Decreased liver protein synthesis would cause the amount of ________ and ________ in the blood to be decreased.

A. RBCs; WBCs B. albumin; fibrinogen C. thromboplastin; RBCs D. platelets; albumin

Anatomy & Physiology

Spermatozoa may remain viable in the female reproductive tract for as long as

A. 24 hours. B. 48 hours. C. 72 hours. D. 96 hours. E. 144 hours.

Anatomy & Physiology

A depression in a bone, shaped like a narrow groove, is called a ________.

A. tubercle B. fissure C. sulcus D. sanal E. fossa

Anatomy & Physiology