Human Physiology: Top hat questions exam 1
Which of the following does not involve moving a substance down its concentration gradient? a) active transport b) simple diffusion c) facilitated diffusion d) osmosis
Active Transport
DNA (genes) directs the production of which of the following? A) proteins B) enzymes C) cytoskeleton D) all of the above
All of the above
When do voltage gated K+ channels open?
At the peak of the action potential
What is the process of fatty acid catabolism into Acetly CoA? A) beta oxidation B) transamination C) glycogenesis D) cori cycle
Beta oxidation
What is the central predominant metabolic pathway in living organisms? A) glycolysis B) cell respiration C) kreb's cycle D) photosynthesis
Cell respiration
The neuromuscular junction is an example of which of the following? a) chemical synapse b) electrical synapse c) adrenergic
Chemical synapse
What process converts lactic acid into glucose? A) glycogenesis B) beta oxidation C) deamination D) cori cycle
Cori cycle
An unpolarized membrane has potential? a) true b) false
False
How is homeostasis achieved in the human body? A) intrinsic control B) feedback loops C) energy and pH D) all of the above
Feedback loops
what can be used to calculate the rate of diffusion? a) Fick's Law b) Law of Mass Diffusion c) Brownian Law d) Law of mass confusion
Fick's Law
What are the components of a triglyceride?
Glycerol and 3 fatty acids
Which process is illustrated? (Start with glycogen and go to glucose) A) gluconeogenesis B) glycolysis C) glycogenesis D) glycogenolysis
Glycogenolysis
What component of the phospholipid is hydrophilic?
Head of phospholipid
A cell that has shriveled was placed in which solution? a) isotonic b) hypotonic c) hypertonic
Hypertonic
In a chemical synapse, there are _____ which facilitate the movement of _____ into the cell. a) gap junctions, ions b) tight junctions, ions c) ligand gated channels, ions d) gap junctions, neurotransmitters
Ligand gated channels, ions
What is the process of breaking down triglycerides into glycerol and fatty acids? A) beta oxidation B) lipogenesis C) ketogenesis D) lipolysis
Lipolysis
Which cytoskeleton component is the largest? A) microfilament B) intermediate filament C) microtubule
Microtubule
Why do action potentials travel towards the axon terminal and not towards the cell body? a) saltatory conduction b) Na+ channels become inactivated c) they don't d) microtubule motors do not move retrograde
Na+ channels become inactivated
Which of the following is not a homeostatic control mechanism? A) positive feedback B) neutral feedback C) negative feedback D) feed-forward
Neutral feedback
In the Kreb's cycle, what 4 carbon compound combines with AcetylCoA ? A) oxaloacetate B) pyruvate C) citrate D) fumarate
Oxaloacetate
Which process produces the greatest number of ATP? A) glycolysis B) reduction of puruvate C) oxidative phosphorylation D) kreb's cycle
Oxidative phosphorylation
What body system does not contribute to homeostasis? A) endocrine system B) reproductive system C) urinary system D) integumentary system
Reproductive system
Which cell organelle is continuous with the nucleus? A) Golgi apparatus B) peroxisome C) mitochondria D) rough ER
Rough ER
Which of the following describes the movement of molecules from high concentration to low concentration without a protein channel? a) Active Transport b) Cotransport c) Simple Diffusion d) Facilitated Diffusion
Simple Diffusion
What is the purpose of cell respiration? A) so the cell can get rid of waste B) so the cell can reproduce C) so the cell can obtain energy D) to release CO2
So the cell can obtain energy
In a resting neuron, ________ is found in high concentrations outside the cell, and ________ is found in high concentrations inside the cell. a) sodium, calcium b) potassium, sodium c) Sodium, Potassium d) Calcium, potassium
Sodium, Potassium
In response to an action potential, ______ enters the axon terminal and triggers the exocytosis of neurotransmitter. a) calcium b) sodium c) potassium d) chloride
calcium
Why does the resting membrane potential change? a) active transport of calcium ions b) controlled movement of sodium ions c) controlled movement of potassium ions d) controlled movement of sodium and potassium ions
controlled movement of sodium and potassium ions
which part of a neuron receives information from other neurons? a) dendrites b) cell body c) axon d) axon terminal
dendrites
Voltage gated Na+ channels will open when the membrane is...? a) hyperpolarized b) repolarized c) depolarized d) at resting potential
depolarized
which term describes a membrane at -90mV? a) repolarized b) hyperpolarized c) depolarized d) at resting potential
hyperpolarized
Which event happens when the membrane depolarizes to threshold? a) voltage gated Na+ channels open b) voltage gated K+ channels open c) voltage gated Na+ channels close d) voltage gated K+ channels close
voltage gated Na+ channels open
What would happen if a patient received a hypotonic solution in their IV? a) water would leave the patient's cells b) water would enter the patient's cells c) osmotic pressure would decrease in the patient's lymphatic system d) it would cause a decrease in urine output
water would enter the patient's cells