What protein is involved in the formation of a blood clot?
A) keratin
B) actin
C) myosin
D) fibrin
D
Explanation:
A) Keratin is a protein formed by epithelia tissue.
B) Actin is a contractile protein found in muscle tissue.
C) Myosin in a contractile protein found in muscle tissue.
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Which of the following events in the menstrual cycle occur at the same time?
A. maximal LH secretion and menstruation (menstrual flow) B. early follicular development in the ovaries and maximum thickening of the uterus C. ovulation and menstruation (menstrual flow) D. uterine wall begins to thicken and increased estrogen production by the follicles E. proliferation and secretion
Which heart chamber receives blood from the pulmonary veins?
What will be an ideal response?
The stomach is considered part of the upper gastrointestinal tract
Indicate whether this statement is true or false.
The mechanism(s) underlying the development of cardiac hypertrophy is(are) complex, though relaxation abnormalities resulting in a chronic elevation of cytosolic Ca++ level appear to promote the development of hypertrophy through:
A. stimulation of the sarcolemmal Ca++ pump B. Ca++ binding to troponin I C. activation of calcineurin D. inhibition of Ca++-calmodulin-dependent protein kinase E. opening Ca++-activated K+ channels