Once threshold is reached, the rising phase of the action potential in pacemaker cells is brought about by the opening of ____-type ____ channels

Fill in the blank(s) with correct word


L, Ca2+

Anatomy & Physiology

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Describe the pelvic adaptations to childbearing in the female

Anatomy & Physiology

The ______ hair cells enhance the response of the _______ hair cells

a. inner/outer b. upper/lower c. lower/upper d. outer/inner

Anatomy & Physiology

Melatonin is an antioxidant that

a. accelerates metabolism b. defends against free radicals c. lowers the concentration of blood sugar d. serves as a secondary messenger e. stimulates reduction reactions

Anatomy & Physiology

Which of the following vitamins is essential for the production of clotting factors?

a) vitamin C b) vitamin K c) vitamin D d) vitamin A

Anatomy & Physiology