General Physiology Quiz: Cell Membrane and Organelles

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What is the most important characteristic of a water-insoluble substance in governing its diffusibility through a cell membrane?

Electrical charge

Molecular weight

Hydrated diameter

Lipid solubility (correct)

Why are mitochondria usually the most abundant organelles in the cell?

Mitochondrion is the control center of the cell

Digestive enzymes are contained within the mitochondria

These structures shuttle proteins and other substances between the E.R. and Golgi apparatus

Practically all cellular processes require ATP as an energy (correct)

How are simple diffusion and facilitated diffusion alike?

Can work in the absence of ATP

Require some carrier mechanism for transport (correct)

Can transport material against a concentration gradient

Display saturation kinetics

Which one of the following accomplishes secondary active transport?

The secretion of H ions by the renal distal tubule Signup and view all the answers

Which of the following is NOT part of the extracellular fluid compartment?

Cerebrospinal fluid Signup and view all the answers

Which body fluid compartment would represent about 40% of the body weight?

Intracellular Signup and view all the answers

In a muscle fiber, what is the main function of tropomyosin?

Normally covers the binding site for myosin Signup and view all the answers

In smooth muscle, which of the following plays a role in the regulation of contraction?

Troponin Signup and view all the answers

As the Na-K pump functions in a neuron membrane, how many Na ions are pumped out for every K ion pumped in?

<ol start="2"> <li>1</li> </ol> Signup and view all the answers

Stimulation of the parasympathetic portion of the autonomic nervous system causes:

Increase gastrointestinal function Signup and view all the answers

The neuronal centers for regulating visceral functions particularly coughing, respiration, blood pressure, and heart rate are in the:

Medulla oblongata Signup and view all the answers

Which play an important role in determining the orientation of the head?

Vestibular system Signup and view all the answers

General Physiology Quiz: Cell Membrane and Organelles

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Questions and Answers

What is the most important characteristic of a water-insoluble substance in governing its diffusibility through a cell membrane?

Why are mitochondria usually the most abundant organelles in the cell?

How are simple diffusion and facilitated diffusion alike?

Which one of the following accomplishes secondary active transport?

Which of the following is NOT part of the extracellular fluid compartment?

Which body fluid compartment would represent about 40% of the body weight?

In a muscle fiber, what is the main function of tropomyosin?

In smooth muscle, which of the following plays a role in the regulation of contraction?

As the Na-K pump functions in a neuron membrane, how many Na ions are pumped out for every K ion pumped in?

Stimulation of the parasympathetic portion of the autonomic nervous system causes:

The neuronal centers for regulating visceral functions particularly coughing, respiration, blood pressure, and heart rate are in the:

Which play an important role in determining the orientation of the head?

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