Answer:
Venoconstriction reduces the amount of blood within the venous system, which increases the volume in the arterial and capillary systems
Step-by-step explanation:
Reflex venoconstriction is characterized as a smooth muscle neurogenically induced contraction in the walls of the veins; it causes a decrease in vascular ability that is seen as a decrease in the amount of blood kept at the same pressure, an increase in the amount of blood pressure at the same volume, or a combination of both.
The vasoconstriction mechanism results from increased calcium concentration (Ca2 + ions) within vascular smooth muscle cells. The basic mechanisms for generating higher intracellular calcium concentrations, however, depend on the vasoconstrictor.
Hence , the first answer is reduces and the second one is increases.