This is an image of an electrocardiogram Which statement describes the condition of the heart at the point indicated in the electrocardiogram?
(The arrow is pointed at the left slant of the peak)
The muscles of the atria depolarize.
The muscles of the ventricles depolarize.
The muscles of the atria repolarize.
The muscles of the ventricles repolarize.

1. watermelon, papaya, oranges, bananas, and lemons are included in this food group. vitamin c 2. you need 6 or more servings of this food group each day vitamins d and a 3. found in fruit and keeps blood vessels healthy calcium 4. vitamins found in milk bread and grain 5. a mineral that strengthens bones fruit

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.

What is the name of the group of elements that are a good conductor of heat? (5 points) select one: a. alkali metals b. halogens c. noble gases d. nonmetals