People use light therapy to treat seasonal affective disorder (SAD), which is depression related to shorter days and reduced sunlight exposure during the fall and winter months. Most people with SAD feel better after they use light therapy.
Answer:
I believe it's C
Explanation:
The pulmonary artery channels oxygen-poor blood from the right ventricle into the lungs, where oxygen enters the bloodstream. The pulmonary veins bring oxygen-rich blood to the left atrium.
Answer:
It is most likely A.
Explanation:
All of the others have to do with emotion.
Answer:
B
Explanation:
A cell maintaining a recommended state of homeostasis means that it is balanced, so it must take in that same amount it takes out.
Cardiac-muscle cells are striated<span>, and are a lot like skeletal-muscle </span>cells<span> except that in cardiac muscle, the fibers are </span>interconnected<span>. The </span>sarcoplasmic reticulum<span> of cardiac-muscle cells is not as well-developed as that of skeletal-muscle cells. Cardiac-muscle contraction is </span>actin-regulated<span>, meaning that the calcium ions come both from the sarcoplasmic reticulum (as in skeletal muscle) and from outside the cell (as in smooth muscle). Otherwise, the chain of events that occurs in cardiac-muscle contraction is similar to that of skeletal muscle.</span>
