Lymphatic capillaries are permeable to proteins
Indicate whether the statement is true or false
TRUE
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In which of the following activities do the biceps brachii function as antagonists?
A. straightening the elbow during a push-up B. straightening the elbow during a pull-up C. curling a barbell from the floor to waist height D. both A and B
Vasoconstriction of the blood vessels to the skin
a. is coordinated by the sympathetic nervous system. b. lowers heat exchange with the environment. c. occurs when core body temperature is elevated. d. both (a) and (b) above e. all of these answers.
Tetanic muscle contractions don't occur in a normal cardiac muscle because
A) cardiac muscle tissue contracts on its own. B) neural stimulation is lacking. C) the refractory period lasts until the muscle relaxes. D) the refractory period ends before the muscle reaches peak tension. E) potassium channels outnumber sodium channels.
What is the correct chronological sequence of events for hearing?a: The tympanic membrane vibrates.b: Ossicles vibrate.c: Spiral organ hair cells convert stimulus to nerve impulse.d: Pressure waves from oval window travel through the scala vestibuli.
A. a, b, c, d B. c, b, a, d C. b, c, d, a D. a, b, d, c E. e, c, , a, b