Animal Phys Quiz questions

How would you express the product of 48,000 and .0002 (to 3 significant digits) in scientific notation?

9.60 X 10⁰

A histogram represents:

the frequency distribution of a data set

Precision refers to:

How closely two or more repeated measures will agree

A hypothesis must be ________________ to be scientifically valid.

falsifiable

If a difference between two groups of measurements is found to be the result of some effect other than random sampling, that difference is said to be:

significant

Osmosis is the passive movement of water across a semi-permeable membrane from an area of _____ solute concentration to an area of _____ solute concentration

low; high

T/F about osmosis: It requires energy.

FALSE

T/F about osmosis: Movement against concentration gradient of water

FALSE

T/F about osmosis: Type of diffusion

TRUE

When water moves out of an animal cell the cell goes through?

Crenation

If you double the concentration of a non-diffusible solute that is on one side of the membrane, the osmotic pressure will:

double

True or False: Larger, more hydrophilic solutes penetrate the cell membrane faster than small, hydrophobic solutes.

False

T/F  Shrinkage of a plant cell in a hypertonic solution is called crenation.

False

plasmolysis

Which of the following occurs when cells are placed in a hypertonic solution?

cell shrink

When diffusion stops, we say the solution has reached

equilibrium

Diffusion can be:

a. simple

b. facilitated

c. osmosis

d. all of the above

All of the above

Avogadro’s number is a constant for the number of:

molecules

Catabolic reactions _____ molecules.

Break down

What three treatments are we using on the crickets today?

Temperature, Food, and Noise Stress

Overall metabolic rate is closely tied to the rate of ______.

Respiration

Crickets are ___?

poikilitherms

Which of these is/are not a method used to measure metabolic rate?

a. Direct Calorimetry

b. Discontinuous gas exchange

c. Respirometry

d. Observation

e. Both b and d

both b (Discontinuous gas exchange) & d (Observation)

Ion channels can be gated by

Ligand or voltage

Each segment of the earthworm has a median giant fiber. These segments are coupled electrically via _______

Gap Junctions

Why are gap junctions important?

they facilitate rapid conduction between cells which allows the giant fiber to behave as a single axon

As the interval between stimuli decreases, the depolarization needed to generate a second action potential:

increases.

What was used to anesthetize the earthworms?

15% Ethanol in earthworm saline