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