The openings of the urethra and the two ureters mark an area on the internal surface of the urinary bladder called the __________.

internal urethral sphincter
renal sinus
external urethral sphincter
trigone


trigone

Anatomy & Physiology

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The contractile response of a muscle fiber to a single action potential is called a(n) ____________________

Fill in the blank(s) with correct word

Anatomy & Physiology

Short cylinders with a 9 + 0 pattern that form the spindle apparatus during cell division are

A. flagella. B. centrioles. C. basal bodies. D. actin filaments.

Anatomy & Physiology

Which structure of the stomach allows greater distension for food storage?

a) Cardia b) Fundus c) Pylorus d) Rugae e) Sphincter

Anatomy & Physiology

Which muscle is not essential to taking a bite of food and chewing it?

A. Masseter B. Palatoglossus C. Temporalis D. Genioglossus E. Zygomaticus major

Anatomy & Physiology