Manganese ions block the calcium channels in the cardiac muscle membrane. How would the presence of manganese in the extracellular fluid affect the contraction of the heart muscle?
A) The refractory period would be shorter.
B) The plateau phase of contraction would be longer.
C) The contraction phase would be prolonged.
D) The heart rate would increase.
E) The heart would beat less forcefully.
E) The heart would beat less forcefully.
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The figure illustrates bones of the right upper limb. What does "D" represent?
A. Ulna B. Carpals C. Metacarpals D. Phalanges E. Radius
An emulsion is a combination of water and a nonpolar liquid that have been forcibly mixed.
Answer the following statement true (T) or false (F)
Which of the following activities would be altered by damage to the olfactory nerve?
A) using your eyes to follow the movements of a dancer B) smiling at your lab partner C) tasting a salty dill pickle D) smelling roses
Matching
A) Neural stimulus B) Hormonal stimulus C) Humoral stimulus 31) Testosterone production. 32) Epinephrine production. 33) Aldosterone production. 34) Parathyroid hormone production.