Sort of, but not reliably. The best way is to pop off the access panel and see.
Just to note, they will be mini PCI-e if anything, usually you'll have one for the WiFI/Bluetooth adapter.
You can download the free software HWiNFO which can list your available slots on the motherboard and whether they are 'In-Use'. As you can see in my screenshot:
(I believe this first screenshot is actually the interface for my dedicated graphics adapter, as I don't think mini PCI-e comes in anything but 1x varieties)
I believe this one is legit, and contains my WiFi/BT card.
That said, I don't actually trust this output, and it's impossible to say for certain as it may list available mini PCI-e slots, but no actual socket is available or soldered to the board. You will need to physically check or look at the service manual for the laptop.