Answer the following statements true (T) or false (F)
1. At the site of an injury, platelets become sticky and form a platelet plug.
2. Vitamin K stimulates the liver to produce more fibrinogen, which helps the blood clot more efficiently.
3. A thrombus is a clot that stays in the place where it was formed.
4. An embolus is part of a clot that has become dislodged and circulates through the bloodstream.
5. If a patient were having a heart attack caused by a blood clot, heparin would be an effective treatment in dissolving the clot.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. FALSE
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When stress is applied to a bone,
A) the minerals in the bone produce a weak electrical field that attracts osteoblasts. B) osteoclast activity increases and osteoblast activity decreases. C) the bone becomes thin and brittle and ultimately fractures. D) the bone compensates by becoming thinner in the region of stress. E) blood supply through the nutrient artery diminishes and thus remodeling proceeds at a much slower rate.
Which statement is the most correct regarding transcription/translation?
A) The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it. B) The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine. C) The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it. D) The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine.
The fimbriae and their cilia usually guide the secondary oocyte into the oviduct following ovulation
Indicate whether the statement is true or false
In what ways is muscle myosin II the same as the myosin used in vesicle travel?
A) They have the same unitary displacement. B) They have the same length of duty cycle. C) Myosin attaches to actin. D) There is a chance myosin can drift away from actin.