The muscles that are found at openings of the body are collectively called ________.

A) convergent muscles
B) circular muscles
C) parallel muscles
D) divergent muscles


Ans: B) circular muscles

Anatomy & Physiology

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You conduct an experiment on twenty 18-year-old male subjects to see how various intensities of exercise influence heart rate. Which of the following is/are considered an independent variable?

A) heart rate B) age of subjects C) intensity of exercise D) sex of subjects E) More than one of the answers is correct.

Anatomy & Physiology

Plasma is ________ while formed elements are ________.

A. mostly protein; the matrix B. the liquid portion of blood; the cells C. a blood gas; blood clots D. lacking in protein; regulators of blood osmolality E. the cellular portion of blood; acellular components

Anatomy & Physiology

Compared to the normal plasma osmolarity, the tubular fluid is ________ as it enters Bowman's space, ________ at the beginning of the loop of Henle, ________ at the tip of the loop, and ________ at the beginning of the distal convoluted tubule

A. isosmotic; hyperosmotic; hyperosmotic; isosmotic B. isosmotic; isosmotic; hypoosmotic; hypoosmotic C. isosmotic; isosmotic; hyperosmotic; hypoosmotic D. isosmotic; isosmotic; hypoosmotic; hyperosmotic E. isosmotic; isosmotic; hyperosmotic; isosmotic

Anatomy & Physiology

After eating, _________ signals the hypothalamus to suppress appetite

A) neuropeptide Y B) leptin C) pepsin D) ghrelin

Anatomy & Physiology