After earning an a in your biology course, your instructor gives you a firm handshake. you can feel the deep pressure of the handshake, and it is so strong it even starts to hurt a little. what type(s) of receptor was (were) activated by the handshake?

Mechanoreceptors and nociceptors are the types of receptors that were activated by the handshake.

Explanation:

Sensory receptors are specialized cells that can sense and respond to various types of stimulus such as sound, pressure, odor, touch, light, and temperature. Sensory receptors are usually found near the surface of different part an organism’s body. Mechanoreceptors are a type of sensory receptors that detect and respond to mechanical pressure (such as when pressure is applied during hand shake), while nociceptors sense and respond to potential injury or damage in the body.

It made it possible to actually see cells.

Explanation: With the development and improvement of the light microscope, the theory created by Sir Robert Hooke that organisms would be made of cells was confirmed as scientist were able to actually see cells in tissues placed under the microscope.