A fistula is a crater-like lesion in the skin or mucous membrane.
a. true
b. false
b. false
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Which hormone is correctly paired with its action?
A) oxytocin â€" stimulates uterine contractions during childbirth B) thyroxine â€" affects biological rhythms, seasonal reproduction C) insulin â€" stimulates glycogen breakdown in the liver D) adrenocorticotropic hormone (ACTH) â€" stimulates metabolic processes E) melatonin â€" stimulates the release of glucocorticoids by the adrenal cortex
Chloramphenicol, a bacteriostatic antimicrobial agent, is an inhibitor of:
A) nucleic acid synthesis B) cell wall synthesis C) cell membrane function D) protein synthesis
To answer the following questions refer to the four items listed below.
A. This is any DNA made from mRNA transcripts. B. This is a nuclease whose function is to cut apart foreign DNA entering a cell. C. This is from a viral source and catalyzes reactions to construct DNA strands from mRNA. D. This is an enzyme used to produce DNA without introns. E. This is a collection of host cells that house cloned genomic DNA.
Hyperthyroidism treatment in cats usually involves antithyroid medication or the use of radioactive iodine to destroy the abnormal (overactive) tissue growing in the thyroid gland. Surgery to remove the abnormal tissue is generally not advised, as the
surgery could also accidentally destroy parathyroid tissue. The parathyroid gland releases a hormone called PTH that increases blood calcium levels. Based on your knowledge of homeostasis, predict why surgery is ill-advised. A) Blood calcium levels would reach abnormally low levels if there is a lack of PTH. B) Blood calcium levels would reach abnormally high levels if there is a lack of PTH. C) Positive feedback will not be able to compensate for any problems caused by negative feedback. D) A lack of PTH disrupts positive feedback control of blood calcium levels.