A&P week 2 quiz 22-23

The horizontal plane within the human body is called the ...

• Frontal

• Oblique

• Transverse

• Parasagittal

Which is NOT a primary tissue in the human body?

• Endothelial

• Connective

• Muscle

• Nerve

The plasma membrane...

• is composed primarily of phospholipids and proteins arranged in a fluid mosaic structure

• has a trilaminar appearance under the electron microscope

• both of the previous are correct

Which statement best describes phospholipids

• They consist of a polar, hydrophilic, phosphate-bearing head and two non-polar hydrophobic, fatty acid tails

• Are aligned in a lipid trilayer forming the plasma membrane

• Serve as carrier molecules for membrane transport

Select which option best summarises carrier-mediated transport.

• Involves a specific membrane protein that serves as a carrier molecule 

• Always moves substances against a concentration gradient 

• Require energy expenditure from the cell to function 

Which of the following is an example of a positive feedback loop?

• Decreasing post-prandial rise in blood glucose level

• Coagulation

• Increasing blood pH following acidosis

Which of the following solutes is most likely to passively diffuse across the plasma membrane (lipid soluble)?

• A cation

• An anion

• A non-polar molecule

• A polar molecule

Which phrase describes information being sent away from the control centre during homeostasis?

• Afferent

• Receptor

• Effector

• Efferent

Glucose enters the cell by simple diffusion?

• True

• False

Carrier proteins are transmembrane proteins?

• True

• False