Movement of which protein directly causes exposure of the active sites on the actin molecule?

A) troponin
B) tropomyosin
C) myosin
D) acetylcholine


Ans: B) tropomyosin

Anatomy & Physiology

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Sleep-wake cycles are produced by interactions of nuclei in the brainstem.

Answer the following statement true (T) or false (F)

Anatomy & Physiology

Pulmonary arteries are wider than systemic arteries. Therefore, pulmonary circuit blood pressure is

A. high and blood flows very rapidly through pulmonary capillaries, maximizing gas exchange. B. high and blood flows very slowly through pulmonary capillaries, maximizing gas exchange. C. low and blood flows very rapidly through pulmonary capillaries, maximizing gas exchange. D. low and blood flows very slowly through pulmonary capillaries, maximizing gas exchange.

Anatomy & Physiology

List and describe the three filtration barriers that substances leaving the plasma must pass through before entering the tubule lumen.

What will be an ideal response?

Anatomy & Physiology

What is the relationship between the accuracy of a subject's tactile localization and the results of the two-point discrimination test?

A) Areas with the most accurate touch localization have the largest two-point thresholds. B) Areas with the most accurate touch localization have the smallest two-point thresholds. C) Areas with the most accurate touch localization have the largest two-point thresholds, and areas with the least accurate touch localization have the smallest two-point thresholds. D) Areas with the least accurate touch localization have the smallest two-point thresholds.

Anatomy & Physiology