The period lasting from closure of the AV valve to opening of the aortic valve is known as
a. isovolumetric ventricular contraction
b. isovolumetric ventricular relaxation
c. the rapid ejection phase
d. the rapid filling phase
e. ventricular diastole
A
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During vagal stimulation of the frog heart, you observe which of the following?
A) The heart slows until it almost stops, then speeds up. B) The heart stops beating, and the frog dies. C) The heart slows, stops, and then begins to beat again. D) The heart slows down.
Fast-oxidative (type IIa) fibers
a. contain very few mitochondria b. can be converted into fast-glycolytic fibers by regular resistance activities c. are most abundant in muscles specialized for maintaining low-intensity contractions for long periods of time without fatigue d. have characteristics b and c e. have none of the above characteristics
The ligament that surrounds the ________ attaches to the tibial tuberosity
A) tibia B) calcaneus C) talus D) patella E) head of the fibula
Which of the following are a group of lipid-soluble hormones derived from cholesterol?
a) Steroids b) Thyroid hormones c) Nitric oxide d) Amine hormones e) Peptide hormones