________ is motion that causes molecules in gases and liquids to bump into adjacent molecules
A) Diffusion
B) Brownian movement
C) Osmosis
D) Concentration gradient
B
Explanation:
A) Diffusion is the net movement of substances from a region of greater concentration to a region of lesser concentration.
C) Osmosis is the net movement of water through a selectively permeable membrane, from a region of greater water concentration to a region of lesser water concentration.
D) Concentration gradients form if a substance is unequally distributed.
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A) calcitonin. B) thyroid hormone. C) parathyroid hormone. D) growth hormone. E) testosterone.
An advantage of innate immunity is ________
A) its barriers that prevent pathogens from entering into the body B) the specificity of its individual cells which specialize in the removal on one type of antigen C) the numerous steps in the activation of its cells that can prevent autoimmune disease D) the use of antibodies to cause cell lysis and kill invading cells
________ sweat glands are widely distributed across the body surface, ________ glands are located wherever hair follicles exist, and ________ sweat glands are found only in a few areas
A) Sebaceous; merocrine; apocrine B) Apocrine; merocrine; sebaceous C) Merocrine; sebaceous; apocrine D) Merocrine; apocrine; sebaceous E) Apocrine; sebaceous; merocrine
Label component "B" on the reflex arc
A. sensory receptor B. effector organ C. sensory neuron D. motor neuron E. interneuron