Practice Exam (Exam 1) Flashcards
1
Q
- Physiological changes that occur in anticipation of a future change to a homeostatic variable are called ____ processes
a) Negative Feedback
b) Forward Feedback
c) Feedforward Regulation
d) Dynamic Constancy
e) Positive Feedback
A
C) feedforward regulation
2
Q
- Which ONE of the following statements is TRUE?
a) Cystic fibrosis is caused by defective aquaporins
b) A lack of vasopressin will increase the volume of extracellular fluid (ECF)
c) The Na+/K+ pump is powered by cAMP
d) Iron uptake by cells depends on phagocytosis
e) Cholesterol increases the viscosity of a membrane
A
cholesterol increases the viscosity of a membrane
3
Q
- Preventing the interaction of glucose-6-phosphate back on hexokinase will result in _____
a) inhibition of the Krebs cycle
b) cell lysis
c) decreased PKA activation
d) proteolysis
e) glycogen synthase activation
A
B) cell lysis
4
Q
- For one cycle of beta-oxidation, __________ goes in and _________ comes out
a) Pyruvate; 3 NADH, 1 FADH, 1 ATP
b) 1 Carbon; 6 NAHD, 1 Acetyl CoA, 2 ATP
c) 2 Pyruvate; 1 NADH, 1 FADH, 1 Acetyl CoA
d) 2 Carbons; 6 NADH, 2 FADH, 2 Acetyl CoA
e) 2 Carbons; 1 NADH, 1 FADH, 1 Acetyl CoA
A
e) 2 carbons, 1 nadh, 1 fadh, 1 acetyl coa
5
Q
- Which ONE of the following statements is FALSE?
An Action Potential ___________
a) Can be generated in the axon hillock
b) Does not occur in the dendrites of most neurons
c) Involves a two-gated voltage-dependent Na+ channel
d) Can be depolarizing or hyperpolarizing
e) Can involves salutatory conduction
A
d) can be depolarizing or hyperpolarizing
6
Q
- Which one of the following is rich at the axon hillock?
a) Leak K+ channel
b) Leak Na+ channel
c) Voltage-gated Na+ channel
d) Mechanically-gated Na+ channel
e) Ligand-gated Na+ channel
A
c) VG Na+ channel
7
Q
if someone has diabetes insipidus, they have a ____ hydration state
A
hypertonic dehydration
8
Q
if someone is excreting excessive ADH (aldesterone) they have a ____ hydration state
A
isotonic overhydration
