Microscopes, micropipettes, orientations

Question 1

Microscope parts.

Answer 1

Question 2

Calculating total magnification.

Answer 2

TM = (ocular lens) x (objective lens).

Typically, the ocular lens has a magnification of x10.

Question 3

Micropipette parts.

Answer 3

When you turn the plunger, you’re changing the volume setting.

Question 4

Explain the difference between the first stop and the second stop of the micropipette plunger.

Answer 4

Use the first stop to collect fluid.

Use the second stop - the blowout - to expel liquid.

Question 5

Body orientations.

Answer 5

Medial: toward the midline.

Lateral: away from the midline.

Ventral: toward the anatomical chest.

Dorsal: toward the anatomical back.

Anterior: toward the front of the body.

Posterior: toward the rear of the body.

Superior: higher up.

Inferior: lower down.

Proximal: closer to the origin of the body part in question.

Distal: farther from the origin of the body part in question.

In bipedal humans, ventral/dorsal and anterior/posterior refer to the same directions.

In quadrupedal animals, ventral/dorsal and superior/inferior refer to the same directions.