Umaine Bio 200 Old exam 2 questions

Why do we see so many differently shaped cells in animals but not in plants?

Plants have cell walls

. Which of the following are incorrectly paired?

Fibrous connective tissue - chondrocytes embedded in chondroitin sulfate

Negative feedback circuits are...

Mechanisms that most commonly maintain homeostasis

Food moves along the digestive tract as the result of contractions by...

Smooth muscles

If you gently twist your earlobe it does not remain distorted because it contains...

Elastic fibers

Tricksy panting after running around on a very hot day is an example of...

Evaporative cooling

Compared with a smaller cell, a larger cell of the same shape has...

Less surface area per unit volume

Which of the following is not descriptive of endotherms?

Energetically efficient and relatively inexpensive

Which of the following would have the highest basal metabolic rate?

Elephant shrew

Which of the following osmoregulatory features is shared by BOTH marine and

freshwater bony fish?

They both regulate salts using their cells in their gills

Transport epithelia are responsible for...

The exchange of solutes for osmoregulation or excretion

Antidiuretic hormone (ADH) increases water reabsorption, and respondings

differently to osmoregulatory problems. Which of the following statements is FALSE?

ADH will be released in response to high alcohol consumption

b. ADH is released when osmoregulatory cells in the hypothalamus sense an

increase in blood osmolarity

c. ADH will be decreased through a negative feedback process in response to

consuming water

d. ADH will decrease in response to consuming food

ADH will be released in response to high alcohol consumption

The high osmolarity of the renal medulla is maintained by all of the following except...

Diffusion of salt from the descending limb of the loop of Henle

A human is lost at sea with no access to freshwater, and decides to drink seawater

instead. This person...

Will excrete more water molecules than taken in, because of the high load of ion ingestion

What form of nitrogenous waste do organisms with shelled eggs excrete, and why?

Uric acid because it precipitates out of solution into a solid

Which of the following processes releases soluble nitrogen as the result of the

breakdown of nitrogen-rich organic compounds?

Mineralization

Where do the nitrogenous wastes in animal bodies come from?

Nucleic acids and proteins

The 3 broad classes of plant tissues are...

Dermal, ground and vascular

Rhizomes, stolons, and tubers are all examples of...

Stems

Transcription and translation can occur in all the following cell types when mature,

except...

Xylem

Which of the following is incorrectly paired?

Sclerenchyma - bring air down to water-logged root cells

The Casparian strip is...

A ring of cells that prevents water from entering vascular tissues without first

crossing the cell membrane

Which of the following could increase the amount of water a plant could bring into its

vascular system?

Increase the concentration of solutes inside the cells of the root hairs