The first animals to show true tissues were

A) Sponges.
B) Placozoans.
C) Cnidarians.
D) Ctenophores.


Answer: C

Anatomy & Physiology

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Epithelial cells that are adapted for membrane transport of materials, such as ions and nutrients, usually have ________ on their apical surface.

A) junctional complexes B) microvilli C) cilia or flagella D) vesicles E) mitochondria

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The negative feedback control of HCl secretion in the gastric phase of gastric regulation is mainly by ________ secretion.

A. increase in somatostatin B. increase in gastrin C. decline in gastrin D. Both decrease in gastrin secretion and increase in somatostatin secretion are correct.

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The large cartilaginous external portion of the ear is called the:

A) ossicle. B) cochlea. C) auricle. D) oval window.

Anatomy & Physiology

Which portion of the kidney delivers urine to the ureter?

A) renal sinus B) renal medulla C) renal cortex D) renal pelvis

Anatomy & Physiology