Transverse tubules and sarcoplasmic reticulum are well developed in
A. skeletal muscle fibers.
B. cardiac muscle fibers.
C. skeletal and cardiac muscle fibers.
D. smooth muscle fibers.
Answer: C
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A term meaning away from the midline of the body is ___________________.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1. A passive process wherein carrier molecules transport materials down concentration gradients across a membrane is called osmosis. 2. Endocytosis is an energy-requiring process where vesicles containing fluid or solid materials from the extracellular environment are formed. 3. Active transport is an energy-requiring process whereby ions and possibly other materials are moved across a membrane by carrier molecules, which work regardless of any concentration gradients. 4. Vesicles that contain oxidases and catalase are called peroxisomes. 5. Structures responsible for essential cleanup and recycling functions inside the cell are called lysosomes.
How can the impact of a temporary or even permanent occlusion (blockage) of a single blood vessel be reduced?
A) by increasing blood flow B) through the presence of anastomoses C) by increasing vessel length D) by increasing blood viscosity E) through decreasing body temperature
What type of cells make up about 90% of the alveolar surface?
A. ciliated simple squamous epithelial cells B. Type I pneumocytes C. Type II pneumocytes D. macrophages