Which is true about mediated transport across cell membranes?
A. It refers to the movement of ions through protein channels.
B. It refers both to simple diffusion and to the active transport of molecules.
C. It is characterized by saturable carriers and a maximum velocity of transport.
D. As the concentration gradient across a membrane increases, the transport rate always increases.
E. It is nonspecific; any transporter can transport any molecule across the cell membrane.
C
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Receptors classified as __________ respond to heat and cold.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1. When blood plasma 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.
A(n) ________ pig is about 40 to 100 pounds
A) finisher B) opener C) grower D) starter
What is a scar?
A. A large amount of granulation tissue converted to dense irregular collagenous connective tissue during tissue repair B. Necrotic tissue that is avascular and consists of a mixture of dead cells and fluid C. The product of the drying out of a blood clot that occurs during primary union