Which ions are critical for the activation of some enzymes?

A) magnesium ions B) fluorine ions C) potassium ions D) chlorine ions


Answer: A

Anatomy & Physiology

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Which is not a membrane-bound organelle?

A. Ribosome B. Endoplasmic reticulum C. Peroxisome D. Golgi apparatus E. Lysosome

Anatomy & Physiology

Placental functions are concentrated in a disc-shaped area in the endometrium called the

A) trophoblast. B) allantois. C) capsular decidua. D) basal decidua. E) parietal decidua.

Anatomy & Physiology

The respiratory membrane is a combination of ________

A) respiratory bronchioles and alveolar ducts B) alveolar and capillary walls and their fused basement membranes C) respiratory bronchioles and alveolar sacs D) atria and alveolar sacs

Anatomy & Physiology

Of the following muscles of the head, which one wraps around the mouth?

A) orbicularis oris B) nasalis C) frontalis D) zygomaticus major

Anatomy & Physiology