Exam 1

Question 1

Conformer

Answer 1

Organism whose internal environment is influenced by external factors

Question 2

Homeostasis

Answer 2

State of steady internal conditions maintained by living organisms

Question 3

Hormone

Answer 3

Secreted into the bloodstream through the endocrine system. Have long-lasting effects

Question 4

Negative Feedback

Answer 4

Product of that reaction leads to a decrease in that reaction. Brings a system closer to homeostasis

Question 5

Acclimation/Acclimatization

Answer 5

Chronic response to a change in environment where organism becomes accustomed to new conditions

Question 6

The term _____ refers to the physiological components of animals that enable them to perform as they do.

Answer 6

Mechanism

Question 7

Referring to the graph: y=2.98x + 0.23
Assuming the relationship depicted above is isometric, you can likely infer that the type of units being compared are the following

Answer 7

y=mass, x=length

Question 8

Referring to the graph: y=2.98x + 0.23
Given the graph above, what feature would indicate a positively allometric relationship?

Answer 8

b>2.98

Question 9

A change in a synapse that would be categorized as synaptic plasticity include:

Answer 9

Long-term potentiation

Question 10

Sweating in response to heat is an example of a(n)

Answer 10

Acute change

Question 11

The electrochemical ion gradient, differential permeability to different ions, and the operation of sodium-potassium ATPase pumps together determine

Answer 11

The resting membrane potential

Question 12

_____ channels are responsible for the brief period of hyperpolarization at the end of an action potential.

Answer 12

Voltage-gated potassium

Question 13

The iodothyronines include hormones such as

Answer 13

Thyroxine

Question 14

In a chemical synapse, the main component responsible for transmission of an impulse from presynaptic to postsynaptic cell is ______

Answer 14

Any generic excitatory current

Question 15

Which of the following could not be the postsynaptic membrane mechanism during an inhibitory postsynaptic potential?

Answer 15

Increase in the permeability of Na+

Question 16

In a neuromuscular junction, which ion enters the axon terminal in response to a presynaptic action potential?

Answer 16

Ca2+

Question 17

The glial cells forming myelin sheaths in the CNS are ______

Answer 17

Oligodendrocytes

Question 18

Receptors for steroid hormones are typically found _____ because these hormones are ______

Answer 18

Inside cells; lipid soluble

Question 19

The time period during which a second action potential cannot be generated at a location on a cell membrane is referred to as the

Answer 19

Absolute refractory period

Question 20

Inhibitory post-synaptic potentials can be caused by the influx of which ion?

Answer 20

Chloride