During an action potential of a neuron, the type of ion that enters the cell and causes depolarization is the _______ ion.
Fill in the blank(s) with the appropriate word(s).
Na+
Anatomy & Physiology
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Ruby is 77 years old and can no longer control her urination. What changed in the reflex pathway that used to control her urination?
What will be an ideal response?
Anatomy & Physiology
Which pigment secreted by specialized cells in the skin is capable of absorbing ultraviolet light?
a) Keratin b) Melanin c) Melatonin d) Carotene e) Collagen
Anatomy & Physiology
The group of pacemaker cells near the entrance of the superior vena cava forms the ________
A) Bundle of His B) Atrioventricular node C) Sinoatrial node D) Myocardium
Anatomy & Physiology
The major cation in extracellular fluid is
A) sodium. B) potassium. C) calcium. D) magnesium. E) iron.
Anatomy & Physiology