Rhodopsin is found in the ________.
A. pigmented retina
B. cones
C. choroid
D. rods
E. amacrine cells
Answer: D
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The Na+ and K+ channels that open and close during an action potential are voltage-gated channels
Indicate whether the statement is true or false
Calcium turns on cross bridges by physically repositioning the troponin-tropomyosin complex to uncover the actin cross-bridge binding sites in
a. skeletal muscle. b. cardiac muscle. c. smooth muscle. d. both skeletal and cardiac muscle. e. all of these answers.
Decreased blood flow to the kidneys would not lead to which of the following?
A) increased blood levels of renin B) elevated blood levels of angiotensin C) increased blood levels of erythropoietin D) increased release of ADH E) increased release of natriuretic peptide
After 3 days, a pre-embryo becomes a solid ball of cells known as a
A) chorion. B) blastomere. C) lacuna. D) morula. E) blastocyst.