Which statements correctly describe the digestive system? Select four options.

A) Food is cut into pieces in the mouth.
B) Food becomes dry in the mouth.
C) Proteins are broken down in the stomach.
D) Carbohydrates are first broken down in the stomach.
E) Food becomes mostly solid in the large intestine.
F) Fat is broken down into smaller droplets in the small intestine.

HELLL AND FASTT HEHEH

Which group of chordates does  notpossess true backbones?                 a.  birds      b.  frogs and toads      c.  lampreys      d.  crocodilians

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1