WSU Biology 251 Exam 1 EXAM Questions & Answers | 100% Verified
solutions |Questions with Correct Answers 2025 latest update!!
1. Which of the following statements about homeostasis d.) The primary mecha-
is FALSE? nism to maintain home-
a.) Homeostasis is the maintenance of the internal ostasis is positive feedback
environment
b.) The organ systems work together to maintain
homeostasis
c.) Illness can result if homeostasis is disrupted
d.) The primary mechanism to maintain homeostasis
is positive feedback
e.) The extracellular fluid is maintained in a state com-
patible for life
2. What type of cell produces myelin sheaths around ax- oligodendrocyte
ons of neurons in the central nervous system?
3. In a neuron, where are voltage-gated calcium channels axon termnial
located?
4. The body fluid compartment with a high potassium intracellular fluid
and protein concentration is _________.
5. In most homeostasis mechanisms, a ________ detects sensor; integrating; cen-
a change in a regulated variable and sends that in- ter; effector
formation to a(n) _________ which relays signals to a(n)
_________.
6. The function of a second messenger system is to amplify the response of
the first messenger
7. Parasympathetic preganglionic neurons release the acetylcholine; acetyl-
neurotransmitter _______; sympathetic preganglionic choline
neurons release the neurotransmitter ______.
1/8
, WSU Biology 251 Exam 1 EXAM Questions & Answers | 100% Verified
solutions |Questions with Correct Answers 2025 latest update!!
8. The electrochemical gradient for sodium across the inward; positive
membrane is such that the net flux for sodium move-
ment is directed ________, thereby causing the cell's
membrane potential to become more _______.
9. Which of the following cells would have a greater elec- c.) cell with membrane po-
trical attraction for sodium ions to enter the cell? tential =-90mV
a.) cell with membrane potential =-70mV
b.) cell with membrane potential = 0mV
c.) cell with membrane potential =-90mV
d.) cell with membrane potential =+20mV
e.) cell with membrane potential =-50mV
10. As the number of receptors on the cell membrane decrease
decreases, the response of the target cell will ________.
11. Which of the following transport mechanisms requires both primary and sec-
energy? ondary active transport
12. True or False. Synaptic communication to a skeletal False
muscle cell via a somatic motor neuron can be excita-
tory or inhibitory
13. Based solely upon its negative electrical charge, the cations
inside of a typical cell will tend to attract extracellular
_____ to move inward
14. Parasympathetic postganglionic neurons release the acetylcholine; norepi-
neurotransmitter ________; sympathetic postganglionic nephrine
neurons release the neurotransmitter ________.
15.
2/8
solutions |Questions with Correct Answers 2025 latest update!!
1. Which of the following statements about homeostasis d.) The primary mecha-
is FALSE? nism to maintain home-
a.) Homeostasis is the maintenance of the internal ostasis is positive feedback
environment
b.) The organ systems work together to maintain
homeostasis
c.) Illness can result if homeostasis is disrupted
d.) The primary mechanism to maintain homeostasis
is positive feedback
e.) The extracellular fluid is maintained in a state com-
patible for life
2. What type of cell produces myelin sheaths around ax- oligodendrocyte
ons of neurons in the central nervous system?
3. In a neuron, where are voltage-gated calcium channels axon termnial
located?
4. The body fluid compartment with a high potassium intracellular fluid
and protein concentration is _________.
5. In most homeostasis mechanisms, a ________ detects sensor; integrating; cen-
a change in a regulated variable and sends that in- ter; effector
formation to a(n) _________ which relays signals to a(n)
_________.
6. The function of a second messenger system is to amplify the response of
the first messenger
7. Parasympathetic preganglionic neurons release the acetylcholine; acetyl-
neurotransmitter _______; sympathetic preganglionic choline
neurons release the neurotransmitter ______.
1/8
, WSU Biology 251 Exam 1 EXAM Questions & Answers | 100% Verified
solutions |Questions with Correct Answers 2025 latest update!!
8. The electrochemical gradient for sodium across the inward; positive
membrane is such that the net flux for sodium move-
ment is directed ________, thereby causing the cell's
membrane potential to become more _______.
9. Which of the following cells would have a greater elec- c.) cell with membrane po-
trical attraction for sodium ions to enter the cell? tential =-90mV
a.) cell with membrane potential =-70mV
b.) cell with membrane potential = 0mV
c.) cell with membrane potential =-90mV
d.) cell with membrane potential =+20mV
e.) cell with membrane potential =-50mV
10. As the number of receptors on the cell membrane decrease
decreases, the response of the target cell will ________.
11. Which of the following transport mechanisms requires both primary and sec-
energy? ondary active transport
12. True or False. Synaptic communication to a skeletal False
muscle cell via a somatic motor neuron can be excita-
tory or inhibitory
13. Based solely upon its negative electrical charge, the cations
inside of a typical cell will tend to attract extracellular
_____ to move inward
14. Parasympathetic postganglionic neurons release the acetylcholine; norepi-
neurotransmitter ________; sympathetic postganglionic nephrine
neurons release the neurotransmitter ________.
15.
2/8
