The only means by which an extracellular chemical messenger can bring about a desired intracellular response is to activate a second messenger system
Indicate whether the statement is true or false
F
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As a venous pathway moves closer to the heart, the veins
A. get smaller. B. get larger. C. show no change in their lumen size.
What is the inner, gelatinous region of each intervertebral disc called?
A. Lamella B. Annulus fibrosus C. Chondral ring D. Nucleus pulposus E. Articular ring
What is the best description of the efferent pathway of a reflex arc?
A. signals from the integrating center to receptors B. the route by which receptors send signals to effectors C. signaling pathway for receptors to influence the integrating center D. the route by which effector organs send signals to receptors E. the route by which signals from an integrating center reach effector organs
The femur articulates with the tibia at the
a. linea aspera. b. medial and lateral condyles. c. head of the femur. d. greater trochanter of the femur.