Afferent and efferent axons travel together in spinal nerves, but they separate into different bundles when they leave and enter the spinal cord. The afferent axons enter the spinal cord via the root and efferent axons leave the spinal cord via the root.

1. Dorsal root

2. Ventral root

Explanation:

The afferent nerves are the neurons that transmit the signals from the sensory receptors to the central system that is the brain and the spinal cord.

These afferent nerves are known as the sensory nerves and they enter the spinal cord through the dorsal root from where it enters the gray matter of the spinal cord.

The efferent nerves are the neurons that transmit the signals from the brain to the effector's muscle and so is known as the motor neuron. The neuron exits the spinal cord from the ventral root of the spinal cord.

Thus, the dorsal and ventral root is the correct options.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.