Player Size/ Speed Questions

Hello I am very new to the game but so far am enjoying it. Just had a quick question that relates to the height and weight of players.
First off does height and weight have anything to do with how well a player can guard other players? For instance if I have a 6'8 center who has good defensive ratings but he is guarding a 7 footer does the game model the 4 inch advantage the offensive player would have? Along the same lines if my center is outweighed by 50 pounds will that affect his ability to guard near the basket and on the flip side would my lighter center have an advantage on offense due to better mobility?
Secondly....are there any speed/athleticism ratings in the game? If not how does the game determine what players are good on the fast break? I have seen some scouting reports reference players being great athletes or being "high flyers". How does the game determine that or are those simply cosmetic to make scouting reports seem more interesting?
Thanks!
First off does height and weight have anything to do with how well a player can guard other players? For instance if I have a 6'8 center who has good defensive ratings but he is guarding a 7 footer does the game model the 4 inch advantage the offensive player would have? Along the same lines if my center is outweighed by 50 pounds will that affect his ability to guard near the basket and on the flip side would my lighter center have an advantage on offense due to better mobility?
Secondly....are there any speed/athleticism ratings in the game? If not how does the game determine what players are good on the fast break? I have seen some scouting reports reference players being great athletes or being "high flyers". How does the game determine that or are those simply cosmetic to make scouting reports seem more interesting?
Thanks!