While playing softball, Sid pulls his hamstring muscle. As a result of the injury, he has difficulty extending and medially rotating his thigh. Which muscle(s) of the hamstring group did he probably injure?


Sid probably injured the semimembranosus and/or the semitendinosus, since both of these muscles have these actions.

Anatomy & Physiology

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The ________ semilunar valve is found between the right ventricle and pulmonary trunk.

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

Anatomy & Physiology

Steroid hormones act through the second-messenger system

Indicate whether the statement is true or false

Anatomy & Physiology

Most of the lymph returns to the venous circulation by way of the

A) right lymphatic duct. B) thoracic duct. C) cisterna chyli. D) hepatic portal vein. E) dural sinus.

Anatomy & Physiology

Which type of taste has the lowest threshold?

A. sweet B. bitter C. salty D. sour E. umami

Anatomy & Physiology