The upper midportion of the abdomen is called the ________ region

Binding of ________ to myosin permits cross-bridge _____________ between actin and myosin in skeletal muscle cells

A. ATP; attachment B. ATP; detachment C. calcium; attachment D. calcium; detachment E. actin; detachment

Eczema is a disorder that results primarily from an allergic reaction

Indicate whether the statement is true or false.

Answer the following statements true (T) or false (F)

1. When blood serum enters a lymph node it is called lymph. 2. It is easier for substances to move into a lymph node than into a blood capillary. 3. Lymph does not circulate through the lymph system the same way blood circulates through the circulatory system. 4. Thymosins are hormones released by the thymus gland, which influence the development of B lymphocytes. 5. The spleen can hold about 100 mL of blood.

What does the hormone produced by the heart do?

A. Increase sodium absorption in the kidney B. Decrease urine output C. Increase sodium excretion in the kidney D. Increase potassium excretion in the kidney E. Increase the heart rate and force