A decrease in the amount of white blood cells is called
leukocytosis.
leukopenia.
differential white blood cell count.
hemostasis.
The Correct Answer is B
A. leukocytosis: This refers to an abnormally high white blood cell count, often indicating infection.
B. leukopenia: The suffix "-penia" means deficiency or poverty. Leukopenia is a decrease in the number of white blood cells.
C. differential white blood cell count: This is a lab test that counts the percentage of each specific type of white blood cell (neutrophils, lymphocytes, etc.).
D. hemostasis: This is the physiological process that stops bleeding.
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Related Questions
Correct Answer is C
Explanation
A. thalamus: This is a structure in the brain that acts as a relay station for sensory information.
B. thyroid: This is an endocrine gland in the neck that regulates metabolism.
C. thymus: The thymus is considered a primary lymphoid organ because it is the site where T-lymphocytes (T cells) mature and become immunocompetent.
D. spleen: The spleen is a secondary lymphoid organ; it filters blood but is not where lymphocytes are "born" or matured.
Correct Answer is A
Explanation
A. Latent period: This is the brief delay between the stimulus and the start of contraction. During this time, the action potential travels down the T-tubules and triggers the release of Ca2+ from the sarcoplasmic reticulum.
B. Contraction phase: This is when the actual cross-bridge cycling and muscle shortening occur (after calcium has already been released).
C. Relaxation phase: This is when calcium is actively pumped back into the sarcoplasmic reticulum.
D. None of the above: Incorrect, as the latent period specifically accounts for these excitation-contraction coupling events.
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