During the common pathway, what turns fibrinogen into fibrin?

A) thrombin B) prothrombin C) plasmin D) tissue factor


Answer: A

Anatomy & Physiology

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The absolute refractory period of an action potential

A) ensures one-way travel down an axon and allows a neuron to ignore a second signal sent that closely follows the first. B) only allows a neuron to ignore a second signal sent that closely follows the first. C) only ensures one -way travel down an axon. D) only prevents summation of action potentials. E) ensures one-way travel down an axon, allows a neuron to ignore a second signal sent that closely follows the first, and prevents summation of action potentials.

Anatomy & Physiology

Which part of the urinary system is not completely retroperitoneal?

a)kidneys b)ureters c)bladder d)nephrons

Anatomy & Physiology

The folds of the internal membrane within mitochondria are called

A) cristae. B) cytosol. C) cisternae. D) matrix. E) histones.

Anatomy & Physiology

The mesoderm forms

A) muscle. B) epidermis. C) the brain. D) the lining of the digestive tract. E) respiratory epithelium.

Anatomy & Physiology