Can some one help me in decribe filtration and reabsorbtion in capillary bed

The neurohypophysis, or pars nervosa, originates as neural tissue that grows down from the hypothalamic region of the brain. The hypothalamus has two important clusters of neurons, one called the supraoptic nuclei and the other, the paraventricular nuclei. The axons from these cell bodies project down the infundibulum stalk and terminate in the posterior pituitary where there respective hormones are stored in vesicles, awaiting release. The embryonic origin of the adrenal medulla is also from neural tissue, arising much like an enlarged ganglion at the end of preganglionic sympathetic neurons that emerge from the spinal cord. Autonomic nerve activity regulates both of these glands. Sensory information sent to the hypothalamus (for example, from infant suckling) or the activation of receptors within the hypothalamus (for example, osmoreceptors by osmolality changes) stimulate reflex secretion of oxytocin and ADH hormones, respectively, which are released from vesicles into the posterior pituitary blood supply. Activation of the adrenal medulla (such as during stress) also starts from the hypothalamus as sympathetic nerve impulses that stimulate the release of epinephrine and norepinephrine catecholamine hormones into the bloodstream. This is part of the “fight-or-flight” response.

Thank you!

Tell me what you've gotten for 1) so far

well I know that the capillary is where the exchange of fluids, gasses, nutrients and so on takes place between the blood and the tissues. And that the filtration is mostly at the arterial end of the capillary bed where then water is forced out of the blood.

is it when the BHP decreases along Capillary, BCOP doesn't change much, and the net filtration between BHP and BCOP is moved into lymph capillaries?