Depolarization occurs because...
What will be an ideal response?
more Na+ diffuse into the cell than K+ diffuse out of it.
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The total number of bones in the bilateral upper extremities and shoulder girdles is 64.
Answer the following statement true (T) or false (F)
Which type of epithelial tissue is found lining the heart, blood vessels and lymphatic vessels?
a) Simple squamous epithelium b) Simple cuboidal epithelium c) Stratified squamous epithelium d) Stratified cuboidal epithelium e) Simple columnar epithelium
Since there are no genes coding for carbohydrates, nucleic acids, or lipids, how do cells produce them?
A. Enzymes encoded by genes synthesize these products. B. Cells import these products from older cells. C. Cells absorb these products by endocytosis. D. Cells are born with all the products they need. E. Cells can produce carbohydrates, nucleic acids, and lipids out of proteins.
Answer the following statements true (T) or false (F)
1. In expiration, the size of the chest cavity is reduced. 2. In the lung, diffusion moves oxygen from the alveoli to the blood. 3. In the lung, hemoglobin becomes oxyhemoglobin. 4. Most of the carbon dioxide in the blood is carried as carbaminohemoglobin. 5. In order for external respiration to take place, the alveoli must have a higher oxygen concentration and a lower carbon dioxide concentration than the blood in the lung capillaries.