One brief stimulus of a skeletal muscle may result in a single isolated contractile event, which is called a twitch. in a living organism, one twitch can generate max tension in a whole muscle. are these statements true or false? a. both of these statements are false.
b. the first statement is false;
c. the second statement is true.
d. both statements are true.
e. the first statement is true;
f. the second statement is false.

Spherocytosis is an inherited blood disease in which the erythrocytes (red blood cells) are spherical instead of biconcave. this condition is inherited in a dominant fashion, with sph- dominant to sph+. in people with spherocytosis, the spleen "reads" the spherical red blood cells as defective, and it removes them from the bloodstream, leading to anemia. the spleen in different people removes the spherical erythrocytes with different efficiencies. some people with spherical erythrocytes suffer severe anemia and some mild anemia, yet others have spleens that function so poorly there are no symptoms of anemia at all. when 2400 people with the genotype sph- sph+ were examined, it was found that 2250 had anemia of varying severity, but 150 had no symptoms. does this description of people with spherocytosis represent incomplete penetrance, variable expressivity, or both? explain your answer. (3 points)

What creates an electric force field that moves electrons through a circuit? a. energy sourceb. loadc. metal wiresd. resistance

Yuan is a firefighter who provides basic first aid at accident scenes. yuan is an emergency medical