In which type of muscle contraction does the load exceed the muscle’s peak capacity?
a. isotonic
b. isometric
c. isocentric
d. eccentric
e. concentric
ANSWER: b
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Match the following items with the correct phrases.
_______1. Capable of producing antibody-secreting plasma cells after clone formation. _______2. They help regulate the immune response by turning off certain activities. _______3. Phagocytic cells that act as “antigen-presenting cells” in the immune response to (processing of) T-dependent antigens. _______4. The major target of human immunodeficiency virus (HIV). _______5. The only cells required in the immune response to T-independent antigens. a. B lymphocytes (B cells) b. macrophages c. mast cells d. TH lymphocytes (THcells) e. TSlymphocytes (TScells)
Within a single cell, which of the following is physically the smallest?
A. Nuclear envelope B. Phospholipid molecule C. Cell membrane D. Mitochondrion
Swollen lymph nodes signal infection and result from increased numbers of ________ that build up in the lymph nodes
Fill in the blank(s) with correct word
The classic "beads-on-a-string" structure is the most decondensed chromatin structure possible and is produced experimentally. Which chromatin components are not retained when this structure is generated?
(a) linker histones (b) linker DNA (c) nucleosome core particles (d) core histones