Contraction of skeletal muscle in response to an action potential requires:
A. Ca++ influx through L-type Ca++ channels
B. Ca++ binding to troponin C
C. phosphorylation of a myosin light chain
D. phosphorylation of troponin I
E. Ca++ extrusion through the Na+-Ca++ antiporter
ANS: B
You might also like to view...
In response to low blood ________, the kidneys secrete __________
A. calcium; renin B. oxygen; erythropoietin C. sodium; calcitriol D. potassium; erythropoietin E. glucose; calcitriol
The airways that carry air to and from the exchange surfaces of the lungs are collectively called the ________.
Fill in the blank(s) with the appropriate word(s).
When correctly situated in anatomical position, where are your feet in relation to your knees?
A) proximal B) medial C) superior D) distal E) deep
The appearance of the external genitalia determines an individual's
A. genotypic sex. B. phenotypic sex. C. gender identity. D. genetic sex.